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3396184ff3
The documentation refers to a deprecated get document API call (it uses document `type`). Co-authored-by: Thiago Souza <thiago@elastic.co>
1133 lines
36 KiB
Plaintext
1133 lines
36 KiB
Plaintext
[[docs-reindex]]
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=== Reindex API
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++++
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<titleabbrev>Reindex</titleabbrev>
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++++
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Copies documents from a _source_ to a _destination_.
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The source and destination can be any pre-existing index, index alias, or
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<<data-streams,data stream>>. However, the source and destination must be
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different. For example, you cannot reindex a data stream into itself.
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[IMPORTANT]
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=================================================
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Reindex requires <<mapping-source-field,`_source`>> to be enabled for
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all documents in the source.
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The destination should be configured as wanted before calling `_reindex`.
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Reindex does not copy the settings from the source or its associated template.
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Mappings, shard counts, replicas, and so on must be configured ahead of time.
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=================================================
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[source,console]
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--------------------------------------------------
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POST _reindex
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{
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"source": {
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"index": "my-index-000001"
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},
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"dest": {
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"index": "my-new-index-000001"
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}
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}
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--------------------------------------------------
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// TEST[setup:my_index_big]
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////
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[source,console-result]
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--------------------------------------------------
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{
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"took" : 147,
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"timed_out": false,
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"created": 120,
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"updated": 0,
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"deleted": 0,
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"batches": 1,
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"version_conflicts": 0,
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"noops": 0,
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"retries": {
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"bulk": 0,
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"search": 0
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},
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"throttled_millis": 0,
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"requests_per_second": -1.0,
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"throttled_until_millis": 0,
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"total": 120,
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"failures" : [ ]
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}
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--------------------------------------------------
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// TESTRESPONSE[s/"took" : 147/"took" : "$body.took"/]
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////
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[[docs-reindex-api-request]]
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==== {api-request-title}
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`POST /_reindex`
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[[docs-reindex-api-desc]]
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==== {api-description-title}
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// tag::docs-reindex-api-desc-tag[]
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Extracts the <<mapping-source-field,document source>> from the source index and indexes the documents into the destination index.
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You can copy all documents to the destination index, or reindex a subset of the documents.
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// end::docs-reindex-api-desc-tag[]
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Just like <<docs-update-by-query,`_update_by_query`>>, `_reindex` gets a
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snapshot of the source but its destination must be **different** so
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version conflicts are unlikely. The `dest` element can be configured like the
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index API to control optimistic concurrency control. Omitting
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`version_type` or setting it to `internal` causes Elasticsearch
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to blindly dump documents into the destination, overwriting any that happen to have
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the same ID.
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Setting `version_type` to `external` causes Elasticsearch to preserve the
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`version` from the source, create any documents that are missing, and update
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any documents that have an older version in the destination than they do
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in the source.
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Setting `op_type` to `create` causes `_reindex` to only create missing
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documents in the destination. All existing documents will cause a version
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conflict.
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IMPORTANT: Because data streams are <<data-streams-append-only,append-only>>,
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any reindex request to a destination data stream must have an `op_type`
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of`create`. A reindex can only add new documents to a destination data stream.
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It cannot update existing documents in a destination data stream.
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By default, version conflicts abort the `_reindex` process.
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To continue reindexing if there are conflicts, set the `"conflicts"` request body parameter to `proceed`.
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In this case, the response includes a count of the version conflicts that were encountered.
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Note that the handling of other error types is unaffected by the `"conflicts"` parameter.
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[[docs-reindex-task-api]]
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===== Running reindex asynchronously
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If the request contains `wait_for_completion=false`, {es}
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performs some preflight checks, launches the request, and returns a
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<<tasks,`task`>> you can use to cancel or get the status of the task.
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{es} creates a record of this task as a document at `.tasks/_doc/${taskId}`.
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When you are done with a task, you should delete the task document so
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{es} can reclaim the space.
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[[docs-reindex-from-multiple-sources]]
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===== Reindex from multiple sources
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If you have many sources to reindex it is generally better to reindex them
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one at a time rather than using a glob pattern to pick up multiple sources. That
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way you can resume the process if there are any errors by removing the
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partially completed source and starting over. It also makes
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parallelizing the process fairly simple: split the list of sources to reindex
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and run each list in parallel.
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One-off bash scripts seem to work nicely for this:
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[source,bash]
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----------------------------------------------------------------
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for index in i1 i2 i3 i4 i5; do
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curl -HContent-Type:application/json -XPOST localhost:9200/_reindex?pretty -d'{
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"source": {
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"index": "'$index'"
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},
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"dest": {
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"index": "'$index'-reindexed"
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}
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}'
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done
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----------------------------------------------------------------
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// NOTCONSOLE
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[[docs-reindex-throttle]]
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===== Throttling
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Set `requests_per_second` to any positive decimal number (`1.4`, `6`,
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`1000`, etc.) to throttle the rate at which `_reindex` issues batches of index
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operations. Requests are throttled by padding each batch with a wait time.
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To disable throttling, set `requests_per_second` to `-1`.
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The throttling is done by waiting between batches so that the `scroll` that `_reindex`
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uses internally can be given a timeout that takes into account the padding.
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The padding time is the difference between the batch size divided by the
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`requests_per_second` and the time spent writing. By default the batch size is
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`1000`, so if `requests_per_second` is set to `500`:
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[source,txt]
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--------------------------------------------------
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target_time = 1000 / 500 per second = 2 seconds
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wait_time = target_time - write_time = 2 seconds - .5 seconds = 1.5 seconds
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--------------------------------------------------
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Since the batch is issued as a single `_bulk` request, large batch sizes
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cause Elasticsearch to create many requests and then wait for a while before
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starting the next set. This is "bursty" instead of "smooth".
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[[docs-reindex-rethrottle]]
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===== Rethrottling
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The value of `requests_per_second` can be changed on a running reindex using
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the `_rethrottle` API:
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[source,console]
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--------------------------------------------------
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POST _reindex/r1A2WoRbTwKZ516z6NEs5A:36619/_rethrottle?requests_per_second=-1
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--------------------------------------------------
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The task ID can be found using the <<tasks,tasks API>>.
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Just like when setting it on the Reindex API, `requests_per_second`
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can be either `-1` to disable throttling or any decimal number
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like `1.7` or `12` to throttle to that level. Rethrottling that speeds up the
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query takes effect immediately, but rethrottling that slows down the query will
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take effect after completing the current batch. This prevents scroll
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timeouts.
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[[docs-reindex-slice]]
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===== Slicing
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Reindex supports <<slice-scroll>> to parallelize the reindexing process.
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This parallelization can improve efficiency and provide a convenient way to
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break the request down into smaller parts.
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NOTE: Reindexing from remote clusters does not support
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<<docs-reindex-manual-slice, manual>> or
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<<docs-reindex-automatic-slice, automatic slicing>>.
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[[docs-reindex-manual-slice]]
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====== Manual slicing
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Slice a reindex request manually by providing a slice id and total number of
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slices to each request:
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[source,console]
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----------------------------------------------------------------
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POST _reindex
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{
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"source": {
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"index": "my-index-000001",
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"slice": {
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"id": 0,
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"max": 2
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}
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},
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"dest": {
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"index": "my-new-index-000001"
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}
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}
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POST _reindex
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{
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"source": {
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"index": "my-index-000001",
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"slice": {
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"id": 1,
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"max": 2
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}
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},
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"dest": {
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"index": "my-new-index-000001"
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}
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}
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----------------------------------------------------------------
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// TEST[setup:my_index_big]
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You can verify this works by:
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[source,console]
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----------------------------------------------------------------
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GET _refresh
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POST my-new-index-000001/_search?size=0&filter_path=hits.total
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----------------------------------------------------------------
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// TEST[continued]
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which results in a sensible `total` like this one:
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[source,console-result]
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----------------------------------------------------------------
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{
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"hits": {
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"total" : {
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"value": 120,
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"relation": "eq"
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}
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}
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}
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----------------------------------------------------------------
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[[docs-reindex-automatic-slice]]
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====== Automatic slicing
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You can also let `_reindex` automatically parallelize using <<slice-scroll>> to
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slice on `_id`. Use `slices` to specify the number of slices to use:
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[source,console]
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----------------------------------------------------------------
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POST _reindex?slices=5&refresh
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{
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"source": {
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"index": "my-index-000001"
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},
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"dest": {
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"index": "my-new-index-000001"
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}
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}
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----------------------------------------------------------------
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// TEST[setup:my_index_big]
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You can also this verify works by:
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[source,console]
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----------------------------------------------------------------
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POST my-new-index-000001/_search?size=0&filter_path=hits.total
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----------------------------------------------------------------
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// TEST[continued]
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which results in a sensible `total` like this one:
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[source,console-result]
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----------------------------------------------------------------
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{
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"hits": {
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"total" : {
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"value": 120,
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"relation": "eq"
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}
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}
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}
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----------------------------------------------------------------
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Setting `slices` to `auto` will let Elasticsearch choose the number of slices to
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use. This setting will use one slice per shard, up to a certain limit. If there
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are multiple sources, it will choose the number of
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slices based on the index or <<data-streams,backing index>> with the smallest
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number of shards.
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Adding `slices` to `_reindex` just automates the manual process used in the
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section above, creating sub-requests which means it has some quirks:
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* You can see these requests in the <<docs-reindex-task-api,Tasks APIs>>. These
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sub-requests are "child" tasks of the task for the request with `slices`.
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* Fetching the status of the task for the request with `slices` only contains
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the status of completed slices.
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* These sub-requests are individually addressable for things like cancelation
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and rethrottling.
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* Rethrottling the request with `slices` will rethrottle the unfinished
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sub-request proportionally.
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* Canceling the request with `slices` will cancel each sub-request.
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* Due to the nature of `slices` each sub-request won't get a perfectly even
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portion of the documents. All documents will be addressed, but some slices may
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be larger than others. Expect larger slices to have a more even distribution.
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* Parameters like `requests_per_second` and `max_docs` on a request with
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`slices` are distributed proportionally to each sub-request. Combine that with
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the point above about distribution being uneven and you should conclude that
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using `max_docs` with `slices` might not result in exactly `max_docs` documents
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being reindexed.
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* Each sub-request gets a slightly different snapshot of the source,
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though these are all taken at approximately the same time.
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[[docs-reindex-picking-slices]]
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====== Picking the number of slices
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If slicing automatically, setting `slices` to `auto` will choose a reasonable
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number for most indices. If slicing manually or otherwise tuning
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automatic slicing, use these guidelines.
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Query performance is most efficient when the number of `slices` is equal to the
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number of shards in the index. If that number is large (e.g. 500),
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choose a lower number as too many `slices` will hurt performance. Setting
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`slices` higher than the number of shards generally does not improve efficiency
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and adds overhead.
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Indexing performance scales linearly across available resources with the
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number of slices.
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Whether query or indexing performance dominates the runtime depends on the
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documents being reindexed and cluster resources.
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[[docs-reindex-routing]]
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===== Reindex routing
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By default if `_reindex` sees a document with routing then the routing is
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preserved unless it's changed by the script. You can set `routing` on the
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`dest` request to change this:
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`keep`::
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Sets the routing on the bulk request sent for each match to the routing on
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the match. This is the default value.
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`discard`::
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Sets the routing on the bulk request sent for each match to `null`.
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`=<some text>`::
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Sets the routing on the bulk request sent for each match to all text after
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the `=`.
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For example, you can use the following request to copy all documents from
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the `source` with the company name `cat` into the `dest` with
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routing set to `cat`.
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[source,console]
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--------------------------------------------------
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POST _reindex
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{
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"source": {
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"index": "source",
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"query": {
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"match": {
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"company": "cat"
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}
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}
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},
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"dest": {
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"index": "dest",
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"routing": "=cat"
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}
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}
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--------------------------------------------------
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// TEST[s/^/PUT source\n/]
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By default `_reindex` uses scroll batches of 1000. You can change the
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batch size with the `size` field in the `source` element:
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[source,console]
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--------------------------------------------------
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POST _reindex
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{
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"source": {
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"index": "source",
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"size": 100
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},
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"dest": {
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"index": "dest",
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"routing": "=cat"
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}
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}
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--------------------------------------------------
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// TEST[s/^/PUT source\n/]
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Reindex can also use the <<ingest>> feature by specifying a
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`pipeline` like this:
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[source,console]
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--------------------------------------------------
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POST _reindex
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{
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"source": {
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"index": "source"
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},
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"dest": {
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"index": "dest",
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"pipeline": "some_ingest_pipeline"
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}
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}
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--------------------------------------------------
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// TEST[s/^/PUT source\n/]
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[[docs-reindex-api-query-params]]
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==== {api-query-parms-title}
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include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=refresh]
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include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=timeout]
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include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=wait_for_active_shards]
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include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=wait_for_completion]
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include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=requests_per_second]
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include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=scroll]
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include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=slices]
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include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=max_docs]
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[[docs-reindex-api-request-body]]
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==== {api-request-body-title}
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`conflicts`::
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(Optional, enum) Set to `proceed` to continue reindexing even if there are conflicts.
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Defaults to `abort`.
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`source`::
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`index`:::
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(Required, string) The name of the data stream, index, or index alias you are copying _from_.
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Also accepts a comma-separated list to reindex from multiple sources.
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`max_docs`:::
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(Optional, integer) The maximum number of documents to reindex.
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`query`:::
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(Optional, <<query-dsl, query object>>) Specifies the documents to reindex using the Query DSL.
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`remote`:::
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`host`::::
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(Optional, string) The URL for the remote instance of {es} that you want to index _from_.
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Required when indexing from remote.
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`username`::::
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(Optional, string) The username to use for authentication with the remote host.
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`password`::::
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(Optional, string) The password to use for authentication with the remote host.
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`socket_timeout`::::
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(Optional, <<time-units, time units>>) The remote socket read timeout. Defaults to 30 seconds.
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`connect_timeout`::::
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(Optional, <<time-units, time units>>) The remote connection timeout. Defaults to 30 seconds.
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`size`:::
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{Optional, integer) The number of documents to index per batch.
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Use when indexing from remote to ensure that the batches fit within the on-heap buffer,
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which defaults to a maximum size of 100 MB.
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`slice`:::
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`id`::::
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(Optional, integer) Slice ID for <<docs-reindex-manual-slice, manual slicing>>.
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`max`::::
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(Optional, integer) Total number of slices.
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`sort`:::
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+
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--
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(Optional, list) A comma-separated list of `<field>:<direction>` pairs to sort by before indexing.
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Use in conjunction with `max_docs` to control what documents are reindexed.
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deprecated::[7.6, Sort in reindex is deprecated. Sorting in reindex was never guaranteed to index documents in order and prevents further development of reindex such as resilience and performance improvements. If used in combination with `max_docs`, consider using a query filter instead.]
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--
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`_source`:::
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(Optional, string) If `true` reindexes all source fields.
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Set to a list to reindex select fields.
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Defaults to `true`.
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`dest`::
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`index`:::
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(Required, string) The name of the data stream, index, or index alias you are copying _to_.
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`version_type`:::
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(Optional, enum) The versioning to use for the indexing operation.
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Valid values: `internal`, `external`, `external_gt`, `external_gte`.
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See <<index-version-types>> for more information.
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`op_type`:::
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(Optional, enum) Set to create to only index documents that do not already exist (put if absent).
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Valid values: `index`, `create`. Defaults to `index`.
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+
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IMPORTANT: To reindex to a data stream destination, this argument must be
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`create`.
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`type`:::
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(Optional, string)
|
|
deprecated:[6.0.0,Types are deprecated and in the process of being removed. See <<removal-of-types>>.]
|
|
<<mapping-type-field,Document type>> for reindexed documents.
|
|
Defaults to `_doc`.
|
|
+
|
|
[WARNING]
|
|
====
|
|
Types in source indices are always ignored, also when not specifying a
|
|
destination `type`. If explicitly specifying destination `type`, the specified
|
|
type must match the type in the destination index or be either unspecified or
|
|
the special value `_doc`. See <<removal-of-types>> for further details.
|
|
====
|
|
|
|
`script`::
|
|
`source`:::
|
|
(Optional, string) The script to run to update the document source or metadata when reindexing.
|
|
`lang`:::
|
|
(Optional, enum) The script language: `painless`, `expression`, `mustache`, `java`.
|
|
For more information, see <<modules-scripting>>.
|
|
|
|
|
|
[[docs-reindex-api-response-body]]
|
|
==== {api-response-body-title}
|
|
|
|
`took`::
|
|
|
|
(integer) The total milliseconds the entire operation took.
|
|
|
|
`timed_out`::
|
|
|
|
{boolean) This flag is set to `true` if any of the requests executed during the
|
|
reindex timed out.
|
|
|
|
`total`::
|
|
|
|
(integer) The number of documents that were successfully processed.
|
|
|
|
`updated`::
|
|
(integer) The number of documents that were successfully updated,
|
|
i.e. a document with same ID already existed prior to reindex updating it.
|
|
|
|
`created`::
|
|
|
|
(integer) The number of documents that were successfully created.
|
|
|
|
`deleted`::
|
|
|
|
(integer) The number of documents that were successfully deleted.
|
|
|
|
`batches`::
|
|
|
|
(integer) The number of scroll responses pulled back by the reindex.
|
|
|
|
`noops`::
|
|
|
|
(integer) The number of documents that were ignored because the script used for
|
|
the reindex returned a `noop` value for `ctx.op`.
|
|
|
|
`version_conflicts`::
|
|
|
|
(integer) The number of version conflicts that reindex hits.
|
|
|
|
`retries`::
|
|
|
|
(integer) The number of retries attempted by reindex. `bulk` is the number of bulk
|
|
actions retried and `search` is the number of search actions retried.
|
|
|
|
`throttled_millis`::
|
|
|
|
(integer) Number of milliseconds the request slept to conform to `requests_per_second`.
|
|
|
|
`requests_per_second`::
|
|
|
|
(integer) The number of requests per second effectively executed during the reindex.
|
|
|
|
`throttled_until_millis`::
|
|
|
|
(integer) This field should always be equal to zero in a `_reindex` response. It only
|
|
has meaning when using the <<docs-reindex-task-api, Task API>>, where it
|
|
indicates the next time (in milliseconds since epoch) a throttled request will be
|
|
executed again in order to conform to `requests_per_second`.
|
|
|
|
`failures`::
|
|
|
|
(array) Array of failures if there were any unrecoverable errors during the process. If
|
|
this is non-empty then the request aborted because of those failures. Reindex
|
|
is implemented using batches and any failure causes the entire process to abort
|
|
but all failures in the current batch are collected into the array. You can use
|
|
the `conflicts` option to prevent reindex from aborting on version conflicts.
|
|
|
|
[[docs-reindex-api-example]]
|
|
==== {api-examples-title}
|
|
|
|
[[docs-reindex-select-query]]
|
|
===== Reindex select documents with a query
|
|
|
|
You can limit the documents by adding a query to the `source`.
|
|
For example, the following request only copies documents with a `user.id` of `kimchy` into `my-new-index-000001`:
|
|
|
|
[source,console]
|
|
--------------------------------------------------
|
|
POST _reindex
|
|
{
|
|
"source": {
|
|
"index": "my-index-000001",
|
|
"query": {
|
|
"term": {
|
|
"user.id": "kimchy"
|
|
}
|
|
}
|
|
},
|
|
"dest": {
|
|
"index": "my-new-index-000001"
|
|
}
|
|
}
|
|
--------------------------------------------------
|
|
// TEST[setup:my_index]
|
|
|
|
[[docs-reindex-select-max-docs]]
|
|
===== Reindex select documents with `max_docs`
|
|
|
|
You can limit the number of processed documents by setting `max_docs`.
|
|
For example, this request copies a single document from `my-index-000001` to
|
|
`my-new-index-000001`:
|
|
|
|
[source,console]
|
|
--------------------------------------------------
|
|
POST _reindex
|
|
{
|
|
"max_docs": 1,
|
|
"source": {
|
|
"index": "my-index-000001"
|
|
},
|
|
"dest": {
|
|
"index": "my-new-index-000001"
|
|
}
|
|
}
|
|
--------------------------------------------------
|
|
// TEST[setup:my_index]
|
|
|
|
[[docs-reindex-multiple-sources]]
|
|
===== Reindex from multiple sources
|
|
|
|
The `index` attribute in `source` can be a list, allowing you to copy from lots
|
|
of sources in one request. This will copy documents from the
|
|
`my-index-000001` and `my-index-000002` indices:
|
|
|
|
[source,console]
|
|
--------------------------------------------------
|
|
POST _reindex
|
|
{
|
|
"source": {
|
|
"index": ["my-index-000001", "my-index-000002"]
|
|
},
|
|
"dest": {
|
|
"index": "my-new-index-000002"
|
|
}
|
|
}
|
|
--------------------------------------------------
|
|
// TEST[setup:my_index]
|
|
// TEST[s/^/PUT my-index-000002\/_doc\/post1?refresh\n{"test": "foo"}\n/]
|
|
|
|
NOTE: The Reindex API makes no effort to handle ID collisions so the last
|
|
document written will "win" but the order isn't usually predictable so it is
|
|
not a good idea to rely on this behavior. Instead, make sure that IDs are unique
|
|
using a script.
|
|
|
|
[[docs-reindex-filter-source]]
|
|
===== Reindex select fields with a source filter
|
|
|
|
You can use source filtering to reindex a subset of the fields in the original documents.
|
|
For example, the following request only reindexes the `user.id` and `_doc` fields of each document:
|
|
|
|
[source,console]
|
|
--------------------------------------------------
|
|
POST _reindex
|
|
{
|
|
"source": {
|
|
"index": "my-index-000001",
|
|
"_source": ["user.id", "_doc"]
|
|
},
|
|
"dest": {
|
|
"index": "my-new-index-000001"
|
|
}
|
|
}
|
|
--------------------------------------------------
|
|
// TEST[setup:my_index]
|
|
|
|
[[docs-reindex-change-name]]
|
|
===== Reindex to change the name of a field
|
|
|
|
`_reindex` can be used to build a copy of an index with renamed fields. Say you
|
|
create an index containing documents that look like this:
|
|
|
|
[source,console]
|
|
--------------------------------------------------
|
|
POST my-index-000001/_doc/1?refresh
|
|
{
|
|
"text": "words words",
|
|
"flag": "foo"
|
|
}
|
|
--------------------------------------------------
|
|
|
|
but you don't like the name `flag` and want to replace it with `tag`.
|
|
`_reindex` can create the other index for you:
|
|
|
|
[source,console]
|
|
--------------------------------------------------
|
|
POST _reindex
|
|
{
|
|
"source": {
|
|
"index": "my-index-000001"
|
|
},
|
|
"dest": {
|
|
"index": "my-new-index-000001"
|
|
},
|
|
"script": {
|
|
"source": "ctx._source.tag = ctx._source.remove(\"flag\")"
|
|
}
|
|
}
|
|
--------------------------------------------------
|
|
// TEST[continued]
|
|
|
|
Now you can get the new document:
|
|
|
|
[source,console]
|
|
--------------------------------------------------
|
|
GET my-new-index-000001/_doc/1
|
|
--------------------------------------------------
|
|
// TEST[continued]
|
|
|
|
which will return:
|
|
|
|
[source,console-result]
|
|
--------------------------------------------------
|
|
{
|
|
"found": true,
|
|
"_id": "1",
|
|
"_index": "my-new-index-000001",
|
|
"_type": "_doc",
|
|
"_version": 1,
|
|
"_seq_no": 44,
|
|
"_primary_term": 1,
|
|
"_source": {
|
|
"text": "words words",
|
|
"tag": "foo"
|
|
}
|
|
}
|
|
--------------------------------------------------
|
|
// TESTRESPONSE[s/"_seq_no": \d+/"_seq_no" : $body._seq_no/ s/"_primary_term": 1/"_primary_term" : $body._primary_term/]
|
|
|
|
[[docs-reindex-daily-indices]]
|
|
===== Reindex daily indices
|
|
|
|
You can use `_reindex` in combination with <<modules-scripting-painless, Painless>> to reindex
|
|
daily indices to apply a new template to the existing documents.
|
|
|
|
Assuming you have indices that contain documents like:
|
|
|
|
[source,console]
|
|
----------------------------------------------------------------
|
|
PUT metricbeat-2016.05.30/_doc/1?refresh
|
|
{"system.cpu.idle.pct": 0.908}
|
|
PUT metricbeat-2016.05.31/_doc/1?refresh
|
|
{"system.cpu.idle.pct": 0.105}
|
|
----------------------------------------------------------------
|
|
|
|
The new template for the `metricbeat-*` indices is already loaded into Elasticsearch,
|
|
but it applies only to the newly created indices. Painless can be used to reindex
|
|
the existing documents and apply the new template.
|
|
|
|
The script below extracts the date from the index name and creates a new index
|
|
with `-1` appended. All data from `metricbeat-2016.05.31` will be reindexed
|
|
into `metricbeat-2016.05.31-1`.
|
|
|
|
[source,console]
|
|
----------------------------------------------------------------
|
|
POST _reindex
|
|
{
|
|
"source": {
|
|
"index": "metricbeat-*"
|
|
},
|
|
"dest": {
|
|
"index": "metricbeat"
|
|
},
|
|
"script": {
|
|
"lang": "painless",
|
|
"source": "ctx._index = 'metricbeat-' + (ctx._index.substring('metricbeat-'.length(), ctx._index.length())) + '-1'"
|
|
}
|
|
}
|
|
----------------------------------------------------------------
|
|
// TEST[continued]
|
|
|
|
All documents from the previous metricbeat indices can now be found in the `*-1` indices.
|
|
|
|
[source,console]
|
|
----------------------------------------------------------------
|
|
GET metricbeat-2016.05.30-1/_doc/1
|
|
GET metricbeat-2016.05.31-1/_doc/1
|
|
----------------------------------------------------------------
|
|
// TEST[continued]
|
|
|
|
The previous method can also be used in conjunction with <<docs-reindex-change-name, changing a field name>>
|
|
to load only the existing data into the new index and rename any fields if needed.
|
|
|
|
[[docs-reindex-api-subset]]
|
|
===== Extract a random subset of the source
|
|
|
|
`_reindex` can be used to extract a random subset of the source for testing:
|
|
|
|
[source,console]
|
|
----------------------------------------------------------------
|
|
POST _reindex
|
|
{
|
|
"max_docs": 10,
|
|
"source": {
|
|
"index": "my-index-000001",
|
|
"query": {
|
|
"function_score" : {
|
|
"random_score" : {},
|
|
"min_score" : 0.9 <1>
|
|
}
|
|
}
|
|
},
|
|
"dest": {
|
|
"index": "my-new-index-000001"
|
|
}
|
|
}
|
|
----------------------------------------------------------------
|
|
// TEST[setup:my_index_big]
|
|
|
|
<1> You may need to adjust the `min_score` depending on the relative amount of
|
|
data extracted from source.
|
|
|
|
[[reindex-scripts]]
|
|
===== Modify documents during reindexing
|
|
|
|
Like `_update_by_query`, `_reindex` supports a script that modifies the
|
|
document. Unlike `_update_by_query`, the script is allowed to modify the
|
|
document's metadata. This example bumps the version of the source document:
|
|
|
|
[source,console]
|
|
--------------------------------------------------
|
|
POST _reindex
|
|
{
|
|
"source": {
|
|
"index": "my-index-000001"
|
|
},
|
|
"dest": {
|
|
"index": "my-new-index-000001",
|
|
"version_type": "external"
|
|
},
|
|
"script": {
|
|
"source": "if (ctx._source.foo == 'bar') {ctx._version++; ctx._source.remove('foo')}",
|
|
"lang": "painless"
|
|
}
|
|
}
|
|
--------------------------------------------------
|
|
// TEST[setup:my_index]
|
|
|
|
Just as in `_update_by_query`, you can set `ctx.op` to change the
|
|
operation that is executed on the destination:
|
|
|
|
`noop`::
|
|
|
|
Set `ctx.op = "noop"` if your script decides that the document doesn't have
|
|
to be indexed in the destination. This no operation will be reported
|
|
in the `noop` counter in the <<docs-reindex-api-response-body, response body>>.
|
|
|
|
`delete`::
|
|
|
|
Set `ctx.op = "delete"` if your script decides that the document must be
|
|
deleted from the destination. The deletion will be reported in the
|
|
`deleted` counter in the <<docs-reindex-api-response-body, response body>>.
|
|
|
|
Setting `ctx.op` to anything else will return an error, as will setting any
|
|
other field in `ctx`.
|
|
|
|
Think of the possibilities! Just be careful; you are able to
|
|
change:
|
|
|
|
* `_id`
|
|
* `_index`
|
|
* `_version`
|
|
* `_routing`
|
|
|
|
Setting `_version` to `null` or clearing it from the `ctx` map is just like not
|
|
sending the version in an indexing request; it will cause the document to be
|
|
overwritten in the destination regardless of the version on the target or the
|
|
version type you use in the `_reindex` request.
|
|
|
|
[[reindex-from-remote]]
|
|
==== Reindex from remote
|
|
|
|
Reindex supports reindexing from a remote Elasticsearch cluster:
|
|
|
|
[source,console]
|
|
--------------------------------------------------
|
|
POST _reindex
|
|
{
|
|
"source": {
|
|
"remote": {
|
|
"host": "http://otherhost:9200",
|
|
"username": "user",
|
|
"password": "pass"
|
|
},
|
|
"index": "my-index-000001",
|
|
"query": {
|
|
"match": {
|
|
"test": "data"
|
|
}
|
|
}
|
|
},
|
|
"dest": {
|
|
"index": "my-new-index-000001"
|
|
}
|
|
}
|
|
--------------------------------------------------
|
|
// TEST[setup:host]
|
|
// TEST[s/^/PUT my-index-000001\n/]
|
|
// TEST[s/otherhost:9200",/\${host}"/]
|
|
// TEST[s/"username": "user",//]
|
|
// TEST[s/"password": "pass"//]
|
|
|
|
The `host` parameter must contain a scheme, host, port (e.g.
|
|
`https://otherhost:9200`), and optional path (e.g. `https://otherhost:9200/proxy`).
|
|
The `username` and `password` parameters are optional, and when they are present `_reindex`
|
|
will connect to the remote Elasticsearch node using basic auth. Be sure to use `https` when
|
|
using basic auth or the password will be sent in plain text.
|
|
There are a range of <<reindex-ssl,settings>> available to configure the behaviour of the
|
|
`https` connection.
|
|
|
|
Remote hosts have to be explicitly allowed in elasticsearch.yml using the
|
|
`reindex.remote.whitelist` property. It can be set to a comma delimited list
|
|
of allowed remote `host` and `port` combinations. Scheme is
|
|
ignored, only the host and port are used. For example:
|
|
|
|
|
|
[source,yaml]
|
|
--------------------------------------------------
|
|
reindex.remote.whitelist: "otherhost:9200, another:9200, 127.0.10.*:9200, localhost:*"
|
|
--------------------------------------------------
|
|
|
|
The list of allowed hosts must be configured on any nodes that will coordinate the reindex.
|
|
|
|
This feature should work with remote clusters of any version of Elasticsearch
|
|
you are likely to find. This should allow you to upgrade from any version of
|
|
Elasticsearch to the current version by reindexing from a cluster of the old
|
|
version.
|
|
|
|
To enable queries sent to older versions of Elasticsearch the `query` parameter
|
|
is sent directly to the remote host without validation or modification.
|
|
|
|
NOTE: Reindexing from remote clusters does not support
|
|
<<docs-reindex-manual-slice, manual>> or
|
|
<<docs-reindex-automatic-slice, automatic slicing>>.
|
|
|
|
Reindexing from a remote server uses an on-heap buffer that defaults to a
|
|
maximum size of 100mb. If the remote index includes very large documents you'll
|
|
need to use a smaller batch size. The example below sets the batch size to `10`
|
|
which is very, very small.
|
|
|
|
[source,console]
|
|
--------------------------------------------------
|
|
POST _reindex
|
|
{
|
|
"source": {
|
|
"remote": {
|
|
"host": "http://otherhost:9200"
|
|
},
|
|
"index": "source",
|
|
"size": 10,
|
|
"query": {
|
|
"match": {
|
|
"test": "data"
|
|
}
|
|
}
|
|
},
|
|
"dest": {
|
|
"index": "dest"
|
|
}
|
|
}
|
|
--------------------------------------------------
|
|
// TEST[setup:host]
|
|
// TEST[s/^/PUT source\n/]
|
|
// TEST[s/otherhost:9200/\${host}/]
|
|
|
|
It is also possible to set the socket read timeout on the remote connection
|
|
with the `socket_timeout` field and the connection timeout with the
|
|
`connect_timeout` field. Both default to 30 seconds. This example
|
|
sets the socket read timeout to one minute and the connection timeout to 10
|
|
seconds:
|
|
|
|
[source,console]
|
|
--------------------------------------------------
|
|
POST _reindex
|
|
{
|
|
"source": {
|
|
"remote": {
|
|
"host": "http://otherhost:9200",
|
|
"socket_timeout": "1m",
|
|
"connect_timeout": "10s"
|
|
},
|
|
"index": "source",
|
|
"query": {
|
|
"match": {
|
|
"test": "data"
|
|
}
|
|
}
|
|
},
|
|
"dest": {
|
|
"index": "dest"
|
|
}
|
|
}
|
|
--------------------------------------------------
|
|
// TEST[setup:host]
|
|
// TEST[s/^/PUT source\n/]
|
|
// TEST[s/otherhost:9200/\${host}/]
|
|
|
|
[[reindex-ssl]]
|
|
===== Configuring SSL parameters
|
|
|
|
Reindex from remote supports configurable SSL settings. These must be
|
|
specified in the `elasticsearch.yml` file, with the exception of the
|
|
secure settings, which you add in the Elasticsearch keystore.
|
|
It is not possible to configure SSL in the body of the `_reindex` request.
|
|
|
|
The following settings are supported:
|
|
|
|
`reindex.ssl.certificate_authorities`::
|
|
List of paths to PEM encoded certificate files that should be trusted.
|
|
You cannot specify both `reindex.ssl.certificate_authorities` and
|
|
`reindex.ssl.truststore.path`.
|
|
|
|
`reindex.ssl.truststore.path`::
|
|
The path to the Java Keystore file that contains the certificates to trust.
|
|
This keystore can be in "JKS" or "PKCS#12" format.
|
|
You cannot specify both `reindex.ssl.certificate_authorities` and
|
|
`reindex.ssl.truststore.path`.
|
|
|
|
`reindex.ssl.truststore.password`::
|
|
The password to the truststore (`reindex.ssl.truststore.path`).
|
|
This setting cannot be used with `reindex.ssl.truststore.secure_password`.
|
|
|
|
`reindex.ssl.truststore.secure_password` (<<secure-settings,Secure>>)::
|
|
The password to the truststore (`reindex.ssl.truststore.path`).
|
|
This setting cannot be used with `reindex.ssl.truststore.password`.
|
|
|
|
`reindex.ssl.truststore.type`::
|
|
The type of the truststore (`reindex.ssl.truststore.path`).
|
|
Must be either `jks` or `PKCS12`. If the truststore path ends in ".p12", ".pfx"
|
|
or "pkcs12", this setting defaults to `PKCS12`. Otherwise, it defaults to `jks`.
|
|
|
|
`reindex.ssl.verification_mode`::
|
|
Indicates the type of verification to protect against man in the middle attacks
|
|
and certificate forgery.
|
|
One of `full` (verify the hostname and the certificate path), `certificate`
|
|
(verify the certificate path, but not the hostname) or `none` (perform no
|
|
verification - this is strongly discouraged in production environments).
|
|
Defaults to `full`.
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|
|
|
`reindex.ssl.certificate`::
|
|
Specifies the path to the PEM encoded certificate (or certificate chain) to be
|
|
used for HTTP client authentication (if required by the remote cluster)
|
|
This setting requires that `reindex.ssl.key` also be set.
|
|
You cannot specify both `reindex.ssl.certificate` and `reindex.ssl.keystore.path`.
|
|
|
|
`reindex.ssl.key`::
|
|
Specifies the path to the PEM encoded private key associated with the
|
|
certificate used for client authentication (`reindex.ssl.certificate`).
|
|
You cannot specify both `reindex.ssl.key` and `reindex.ssl.keystore.path`.
|
|
|
|
`reindex.ssl.key_passphrase`::
|
|
Specifies the passphrase to decrypt the PEM encoded private key
|
|
(`reindex.ssl.key`) if it is encrypted.
|
|
Cannot be used with `reindex.ssl.secure_key_passphrase`.
|
|
|
|
`reindex.ssl.secure_key_passphrase` (<<secure-settings,Secure>>)::
|
|
Specifies the passphrase to decrypt the PEM encoded private key
|
|
(`reindex.ssl.key`) if it is encrypted.
|
|
Cannot be used with `reindex.ssl.key_passphrase`.
|
|
|
|
`reindex.ssl.keystore.path`::
|
|
Specifies the path to the keystore that contains a private key and certificate
|
|
to be used for HTTP client authentication (if required by the remote cluster).
|
|
This keystore can be in "JKS" or "PKCS#12" format.
|
|
You cannot specify both `reindex.ssl.key` and `reindex.ssl.keystore.path`.
|
|
|
|
`reindex.ssl.keystore.type`::
|
|
The type of the keystore (`reindex.ssl.keystore.path`). Must be either `jks` or `PKCS12`.
|
|
If the keystore path ends in ".p12", ".pfx" or "pkcs12", this setting defaults
|
|
to `PKCS12`. Otherwise, it defaults to `jks`.
|
|
|
|
`reindex.ssl.keystore.password`::
|
|
The password to the keystore (`reindex.ssl.keystore.path`). This setting cannot be used
|
|
with `reindex.ssl.keystore.secure_password`.
|
|
|
|
`reindex.ssl.keystore.secure_password` (<<secure-settings,Secure>>)::
|
|
The password to the keystore (`reindex.ssl.keystore.path`).
|
|
This setting cannot be used with `reindex.ssl.keystore.password`.
|
|
|
|
`reindex.ssl.keystore.key_password`::
|
|
The password for the key in the keystore (`reindex.ssl.keystore.path`).
|
|
Defaults to the keystore password. This setting cannot be used with
|
|
`reindex.ssl.keystore.secure_key_password`.
|
|
|
|
`reindex.ssl.keystore.secure_key_password` (<<secure-settings,Secure>>)::
|
|
The password for the key in the keystore (`reindex.ssl.keystore.path`).
|
|
Defaults to the keystore password. This setting cannot be used with
|
|
`reindex.ssl.keystore.key_password`.
|