Expand `/_cat/nodes` with already present information about available disk space `diskAvail` (alias: `d`, `disk`) by:
* `diskTotal` (alias `dt`): total disk space
* `diskUsed` (alias `du`): used disk space (`diskTotal - diskAvail`)
* `diskUsedPercent` (alias `dup`): used disk space percentage
Note: The available disk space is the number of bytes available to the node's Java virtual machine. The size might be smaller than the real one. That means the used disk space (percentage) is larger.
Closes#21679
Converts docs for `_cat/segments`, `_cat/plugins` and `_cat/repositories`
from `curl` to `// CONSOLE` so they are tested as part of the build and
are cleaner to use in Console. They should work fine with `curl` with
the `COPY AS CURL` link.
Also swaps the `source` type of the response from `js` to `txt` because
that is more correct. The syntax highlighter doesn't care. It looks at
the text to figure out the language. So it looks a little funny for `_cat`
responses regardless.
Relates to #18160
_cat/nodes used to return `c` for client node or `d` for data node as part of the node.role column. This commit changes it to return `m` for master eligible, `d` for data and/or `i` for ingest. A node with no explicit roles will be a coordinating only node and marked with `-`. A node can obviously have multiple roles. The master column has been adapted to return only whether a node is the current master (`*`) or not (`-`).
This commit adds basic support to track the number of times scripts are
compiled and compiled scripts are evicted from the script cache. These
statistics are tracked at the node level.
Closes#12673
cat/nodes currently does not report any details related to file descriptors. This adds the current number in use, the maximum number available as well as their ratio (percentage) to cat/nodes as hidden-by-default metrics. In addition, this also adds current heap usage (as a non-percentage of ts max) and ram usage (as a non-percerntage of its max) to allow tools to provide more granularity.
Closes#7652
Adds a table with the exhaustive list of all available headers with a brief description (mostly from `org.elasticsearch.rest.action.cat.RestNodesAction`) so that people do not need to go searching for them in the code like I did, or search through `nodes?help`.
Clinton Gormley
Andreas Gebhardt
Andreas Roussos
Patryk Krawaczyński
Nik Everett
Tanguy Leroux
Mike McCandless
javanna
Alexander Kazakov
Henrik Nordvik
Jason Tedor
Martijn van Groningen
Erik Ringsmuth
Chris Earle
mikemccand
Areek Zillur
Chris Earle
Andrew Raines