Commit Graph

654 Commits

Author SHA1 Message Date
Ioannis Kakavas 4f3548fbd7
Disable diagnostic trust manager in tests (#51501)
This commit sets `xpack.security.ssl.diagnose.trust` to false in all
of our tests when running in FIPS 140 mode and when settings objects
are used to create an instance of the SSLService. This is needed
in 7.x because setting xpack.security.ssl.diagnose.trust to true
wraps SunJSSE TrustManager with our own DiagnosticTrustManager and
this is not allowed when SunJSSE is in FIPS mode.
An alternative would be to set xpack.security.fips.enabled to
true which would also implicitly disable
xpack.security.ssl.diagnose.trust but would have additional effects
(would require that we set PBKDF2 for password hashing algorithm in
all test clusters, would prohibit using JKS keystores in nodes even
if relevant tests have been muted in FIPS mode etc.)

Relates: #49900
Resolves: #51268
2020-01-28 10:17:35 +02:00
Przemko Robakowski 919083decd
Don't overwrite target field with SetSecurityUserProcessor (#51454) (#51506)
* Don't overwrite target field with SetSecurityUserProcessor

This change fix problem with `SetSecurityUserProcessor` which was overwriting
whole target field and not only fields really filled by the processor.

Closes #51428

* Unused imports removed
2020-01-28 02:12:09 +01:00
Ioannis Kakavas ee202a642f
Enable tests in FIPS 140 in JDK 11 (#49485)
This change changes the way to run our test suites in 
JVMs configured in FIPS 140 approved mode. It does so by:

- Configuring any given runtime Java in FIPS mode with the bundled
policy and security properties files, setting the system
properties java.security.properties and java.security.policy
with the == operator that overrides the default JVM properties
and policy.

- When runtime java is 11 and higher, using BouncyCastle FIPS 
Cryptographic provider and BCJSSE in FIPS mode. These are 
used as testRuntime dependencies for unit
tests and internal clusters, and copied (relevant jars)
explicitly to the lib directory for testclusters used in REST tests

- When runtime java is 8, using BouncyCastle FIPS 
Cryptographic provider and SunJSSE in FIPS mode. 

Running the tests in FIPS 140 approved mode doesn't require an
additional configuration either in CI workers or locally and is
controlled by specifying -Dtests.fips.enabled=true
2020-01-27 11:14:52 +02:00
Tim Vernum 0981a469ae
Preserve ApiKey credentials for async verification (#51389)
The ApiKeyService would aggressively "close" ApiKeyCredentials objects
during processing. However, under rare circumstances, the verfication
of the secret key would be performed asychronously and may need access
to the SecureString after it had been closed by the caller.

The trigger for this would be if the cache already held a Future for
that ApiKey, but the future was not yet complete. In this case the
verification of the secret key would take place asynchronously on the
generic thread pool.

This commit moves the "close" of the credentials to the body of the
listener so that it only occurs after key verification is complete.

Backport of: #51244
2020-01-24 19:35:07 +11:00
Ioannis Kakavas d279b462f7
Fix flaky testCreateApiKey test (#51223) (#51349)
API Key expiration value has millisecond precision as we use
{@link Instant#toEpoqueMilli()} when creating the API key
document.
It could often happen that `Instant.now()` Instant in the testCreateApiKey
was close enough to the ApiKeyService's `clock.instant()` Instant,
when the nanos were removed from the latter ( due to the call
to `toEpoqueMilli()` ) the result of comparing these two Instants
was a few nanos short of a 7 days.

Resolves: #47958
2020-01-23 17:45:55 +02:00
Ioannis Kakavas a76321437c
Truncate SAML Response in trace log (#51237) (#51283)
When not truncated, a long SAML response XML document can fill max
line length and mask the actual exception message that the trace
statement is meant to inform about.
The same XML Document is also printed in full on trace level in
SamlRequestHandler#parseSamlMessage() so there is no loss of
information
2020-01-22 09:56:39 +02:00
Jay Modi 107989df3e
Introduce hidden indices (#51164)
This change introduces a new feature for indices so that they can be
hidden from wildcard expansion. The feature is referred to as hidden
indices. An index can be marked hidden through the use of an index
setting, `index.hidden`, at creation time. One primary use case for
this feature is to have a construct that fits indices that are created
by the stack that contain data used for display to the user and/or
intended for querying by the user. The desire to keep them hidden is
to avoid confusing users when searching all of the data they have
indexed and getting results returned from indices created by the
system.

Hidden indices have the following properties:
* API calls for all indices (empty indices array, _all, or *) will not
  return hidden indices by default.
* Wildcard expansion will not return hidden indices by default unless
  the wildcard pattern begins with a `.`. This behavior is similar to
  shell expansion of wildcards.
* REST API calls can enable the expansion of wildcards to hidden
  indices with the `expand_wildcards` parameter. To expand wildcards
  to hidden indices, use the value `hidden` in conjunction with `open`
  and/or `closed`.
* Creation of a hidden index will ignore global index templates. A
  global index template is one with a match-all pattern.
* Index templates can make an index hidden, with the exception of a
  global index template.
* Accessing a hidden index directly requires no additional parameters.

Backport of #50452
2020-01-17 10:09:01 -07:00
Ioannis Kakavas 4fc865e579
Don't fallback to anonymous for tokens/apikeys (#51042) (#51159)
This commit changes our behavior so that when we receive a
request with an invalid/expired/wrong access token or API Key
we do not fallback to authenticating as the anonymous user even if
anonymous access is enabled for Elasticsearch.
2020-01-17 18:56:02 +02:00
Ioannis Kakavas d0554fd317
Fail gracefully on invalid token strings (#51014) (#51096)
When we receive a request with an Authorization header that contains
a Bearer token that is not generated by us or that is malformed in
some way, attempting to decode it as one of our own might cause a
number of exceptions that are not IOExceptions. This commit ensures
that we catch and log these too and call onResponse with `null, so
that we can return 401 instead of 500.

Resolves: #50497
2020-01-16 17:00:17 +02:00
Tim Vernum ac6602a156
Fix windows newline issue in test (#51082)
Fixes HttpCertificateCommandTests.testTextFileSubstitutions on Windows

Backport of: #51030
2020-01-16 17:01:58 +11:00
Yang Wang c1a6d5d9ff
Encrypt generated key with AES (#51019) (#51076)
Replace DES with AES to align with modern encryption standards
Backport also fixs Files.readString API that is not available in Java 8

Resolves: #50843
2020-01-16 14:47:21 +11:00
Tim Vernum e41c0b1224
Deprecating kibana_user and kibana_dashboard_only_user roles (#50963)
This change adds a new `kibana_admin` role, and deprecates
the old `kibana_user` and`kibana_dashboard_only_user`roles.

The deprecation is implemented via a new reserved metadata
attribute, which can be consumed from the API and also triggers
deprecation logging when used (by a user authenticating to
Elasticsearch).

Some docs have been updated to avoid references to these
deprecated roles.

Backport of: #46456

Co-authored-by: Larry Gregory <lgregorydev@gmail.com>
2020-01-15 11:07:19 +11:00
Daniel Mitterdorfer 263083b882
Mute HttpCertificateCommandTests.testTextFileSubstitutions (#50965) (#50966)
Relates #50964
2020-01-14 12:40:34 +01:00
Tim Vernum 2bb7b53e41
Add certutil http command (#50952)
This adds a new "http" sub-command to the certutil CLI tool.

The http command generates certificates/CSRs for use on the http
interface of an elasticsearch node/cluster.
It is designed to be a guided tool that provides explanations and
sugestions for each of the configuration options. The generated zip
file output includes extensive "readme" documentation and sample
configuration files for core Elastic products.

Backport of: #49827
2020-01-14 21:24:21 +11:00
Tim Vernum 33c29fb5a3
Support Client and RoleMapping in custom Realms (#50950)
Previously custom realms were limited in what services and components
they had easy access to. It was possible to work around this because a
security extension is packaged within a Plugin, so there were ways to
store this components in static/SetOnce variables and access them from
the realm, but those techniques were fragile, undocumented and
difficult to discover.

This change includes key services as an argument to most of the methods
on SecurityExtension so that custom realm / role provider authors can
have easy access to them.

Backport of: #50534
2020-01-14 15:26:41 +11:00
Tim Vernum 90ba77951a
Fix memory leak in DLS bitset cache (#50946)
The Document Level Security BitSet cache stores a secondary "lookup
map" so that it can determine which cache entries to invalidate when
a Lucene index is closed (merged, etc).

There was a memory leak because this secondary map was not cleared
when entries were naturally evicted from the cache (due to size/ttl
limits).

This has been solved by adding a cache removal listener and processing
those removal events asyncronously.

Backport of: #50635
2020-01-14 13:19:05 +11:00
Tim Vernum 1577a0e617
Validate field permissions when creating a role (#50917)
When creating a role, we do not check if the exceptions for
the field permissions are a subset of granted fields. If such
a role is assigned to a user then that user's authentication fails
for this reason.

We added a check to validate role query in #46275 and on the same lines,
this commit adds check if the exceptions for the field
permissions is a subset of granted fields when parsing the
index privileges from the role descriptor.

Backport of: #50212

Co-authored-by: Yogesh Gaikwad <bizybot@users.noreply.github.com>
2020-01-14 12:37:45 +11:00
Ioannis Kakavas ba37e3c4a0
Disable DiagnosticTrustManager in FIPS 140 (#49888)
This commit changes the default behavior for
xpack.security.ssl.diagnose.trust when running in a FIPS 140 JVM.

More specifically, when xpack.security.fips_mode.enabled is true:

- If xpack.security.ssl.diagnose.trust is not explicitly set, the
    default value of it becomes false and a log message is printed
    on info level, notifying of the fact that the TLS/SSL diagnostic
    messages are not enabled when in a FIPS 140 JVM.
- If xpack.security.ssl.diagnose.trust is explicitly set, the value of
    it is honored, even in FIPS mode.

This is relevant only for 7.x where we support Java 8 in which
SunJSSE can still be used as a FIPS 140 provider for TLS. SunJSSE
in FIPS mode, disallows the use of other TrustManager implementations
than the one shipped with SunJSSE.
2020-01-13 17:04:23 +02:00
Albert Zaharovits 4e837599b3 Nit fix test randomInt bound
Relates 2b789fa3e6
2020-01-13 13:28:20 +02:00
Albert Zaharovits 2b789fa3e6
Make .async-search-* a restricted namespace (#50294)
Hide the `.async-search-*` in Security by making it a restricted index namespace.
The namespace is hard-coded.
To grant privileges on restricted indices, one must explicitly toggle the
`allow_restricted_indices` flag in the indices permission in the role definition.
As is the case with any other index, if a certain user lacks all permissions for an
index, that index is effectively nonexistent for that user.
2020-01-13 12:20:54 +02:00
Tim Vernum 985c95dcca
Populate OpenIDConnect metadata collections (#50893)
The OpenIdConnectRealm had a bug which would cause it not to populate
User metadata for collections contained in the user JWT claims.

This commit fixes that bug.

Backport of: #50521
2020-01-13 18:02:22 +11:00
Ioannis Kakavas d2189b9d80
Mute SamlAuthenticatorTests in Azulu Zulu (#50779)
See #49742
2020-01-09 09:41:04 +02:00
Tim Vernum 293661d62c
Security should not reload files that haven't changed (#50724)
In security we currently monitor a set of files for changes:

- config/role_mapping.yml (or alternative configured path)
- config/roles.yml
- config/users
- config/users_roles

This commit prevents unnecessary reloading when the file change actually doesn't change the internal structure.

Backport of: #50207

Co-authored-by: Anton Shuvaev <anton.shuvaev91@gmail.com>
2020-01-08 15:13:47 +11:00
Nik Everett 7fd84a03a0
Drop references to deprecated logger (#50474) (#50681)
This drops all remaining references to `BaseRestHandler.logger` which
has been deprecated for something like a year now. I replaced all of the
references with locally declared loggers which is so much less spooky
action at a distance to me.
2020-01-06 16:34:07 -05:00
Albert Zaharovits 9ae3cd2a78
Add 'monitor_snapshot' cluster privilege (#50489) (#50647)
This adds a new cluster privilege `monitor_snapshot` which is a restricted
version of `create_snapshot`, granting the same privileges to view
snapshot and repository info and status but not granting the actual
privilege to create a snapshot.

Co-authored-by: j-bean <anton.shuvaev91@gmail.com>
2020-01-06 13:15:55 +02:00
Tim Vernum cad0f6bf28
Do not load SSLService in plugin contructor (#50519)
XPackPlugin created an SSLService within the plugin contructor.
This has 2 negative consequences:

1. The service may be constructed based on a partial view of settings.
   Other plugins are free to add setting values via the
   additionalSettings() method, but this (necessarily) happens after
   plugins have been constructed.

2. Any exceptions thrown during the plugin construction are handled
   differently than exceptions thrown during "createComponents".
   Since SSL configurations exceptions are relatively common, it is
   far preferable for them to be thrown and handled as part of the
   createComponents flow.

This commit moves the creation of the SSLService to
XPackPlugin.createComponents, and alters the sequence of some other
steps to accommodate this change.

Backport of: #49667
2019-12-30 14:42:32 +11:00
Jason Tedor 7c5a3bcf6d
Always consume the body in has privileges (#50298)
Our REST infrastructure will reject requests that have a body where the
body of the request is never consumed. This ensures that we reject
requests on endpoints that do not support having a body. This requires
cooperation from the REST handlers though, to actually consume the body,
otherwise the REST infrastructure will proceed with rejecting the
request. This commit addresses an issue in the has privileges API where
we would prematurely try to reject a request for not having a username,
before consuming the body. Since the body was not consumed, the REST
infrastructure would instead reject the request as a bad request.
2019-12-18 08:30:53 -05:00
Armin Braun 761d6e8e4b
Remove BlobContainer Tests against Mocks (#50194) (#50220)
* Remove BlobContainer Tests against Mocks

Removing all these weird mocks as asked for by #30424.
All these tests are now part of real repository ITs and otherwise left unchanged if they had
independent tests that didn't call the `createBlobStore` method previously.
The HDFS tests also get added coverage as a side-effect because they did not have an implementation
of the abstract repository ITs.

Closes #30424
2019-12-16 11:37:09 +01:00
Ioannis Kakavas 46376100b1
Fix testMalformedToken (#50164) (#50170)
This test was fixed as part of #49736 so that it used a
TokenService mock instance that was enabled, so that token
verification fails because the token is invalid and not because
the token service is not enabled.
When the randomly generated token we send, decodes to being of
version > 7.2 , we need to have mocked a GetResponse for the call
that TokenService#getUserTokenFromId will make, otherwise this
hangs and times out.
2019-12-13 13:46:44 +02:00
Ioannis Kakavas 3b613c36f4
Always return 401 for not valid tokens (#49736) (#50042)
Return a 401 in all cases when a request is submitted with an
access token that we can't consume. Before this change, we would
throw a 500 when a request came in with an access token that we
had generated but was then invalidated/expired and deleted from
the tokens index.

Resolves: #38866
Backport of #49736
2019-12-11 09:14:50 +02:00
Armin Braun 996cddd98b
Stop Copying Every Http Request in Message Handler (#44564) (#49809)
* Copying the request is not necessary here. We can simply release it once the response has been generated and a lot of `Unpooled` allocations that way
* Relates #32228
   * I think the issue that preventet that PR  that PR from being merged was solved by #39634 that moved the bulk index marker search to ByteBuf bulk access so the composite buffer shouldn't require many additional bounds checks  (I'd argue the bounds checks we add, we save when copying the composite buffer)
* I couldn't neccessarily reproduce much of a speedup from this change, but I could reproduce a very measureable reduction in GC time with e.g. Rally's PMC (4g heap node and bulk requests of size 5k saw a reduction in young GC time by ~10% for me)
2019-12-04 08:41:42 +01:00
Tim Vernum e6f530c167
Improved diagnostics for TLS trust failures (#49669)
- Improves HTTP client hostname verification failure messages
- Adds "DiagnosticTrustManager" which logs certificate information
  when trust cannot be established (hostname failure, CA path failure,
  etc)

These diagnostic messages are designed so that many common TLS
problems can be diagnosed based solely (or primarily) on the
elasticsearch logs.

These diagnostics can be disabled by setting

     xpack.security.ssl.diagnose.trust: false

Backport of: #48911
2019-11-29 15:01:20 +11:00
Ioannis Kakavas ba0c848027
[7.x] Update opensaml dependency (#44972) (#49512)
Add a mirror of the maven repository of the shibboleth project
and upgrade opensaml and related dependencies to the latest
version available version

Resolves: #44947
2019-11-29 00:17:16 +02:00
Jim Ferenczi d6445fae4b Add a cluster setting to disallow loading fielddata on _id field (#49166)
This change adds a dynamic cluster setting named `indices.id_field_data.enabled`.
When set to `false` any attempt to load the fielddata for the `_id` field will fail
with an exception. The default value in this change is set to `false` in order to prevent
fielddata usage on this field for future versions but it will be set to `true` when backporting
to 7x. When the setting is set to true (manually or by default in 7x) the loading will also issue
a deprecation warning since we want to disallow fielddata entirely when https://github.com/elastic/elasticsearch/issues/26472
is implemented.

Closes #43599
2019-11-28 09:35:28 +01:00
Tim Vernum 901c64ebbf
Add Debug/Trace logging for authentication (#49619)
Authentication has grown more complex with the addition of new realm
types and authentication methods. When user authentication does not
behave as expected it can be difficult to determine where and why it
failed.

This commit adds DEBUG and TRACE logging at key points in the
authentication flow so that it is possible to gain addition insight
into the operation of the system.

Backport of: #49575
2019-11-27 16:39:07 +11:00
Tim Vernum e9ad1a7fcd
Fix iterate-from-1 bug in smart realm order (#49614)
The AuthenticationService has a feature to "smart order" the realm
chain so that whicherver realm was the last one to successfully
authenticate a given user will be tried first when that user tries to
authenticate again.

There was a bug where the building of this realm order would
incorrectly drop the first realm from the default chain unless that
realm was the "last successful" realm.

In most cases this didn't cause problems because the first realm is
the reserved realm and so it is unusual for a user that authenticated
against a different realm to later need to authenticate against the
resevered realm.

This commit fixes that bug and adds relevant asserts and tests.

Backport of: #49473
2019-11-27 13:46:52 +11:00
Armin Braun 3862400270
Remove Redundant EsBlobStoreTestCase (#49603) (#49605)
All the implementations of `EsBlobStoreTestCase` use the exact same
bootstrap code that is also used by their implementation of
`EsBlobStoreContainerTestCase`.
This means all tests might as well live under `EsBlobStoreContainerTestCase`
saving a lot of code duplication. Also, there was no HDFS implementation for
`EsBlobStoreTestCase` which is now automatically resolved by moving the tests over
since there is a HDFS implementation for the container tests.
2019-11-26 20:57:19 +01:00
Tim Vernum 2e5f2dd1e1
Deprecate misconfigured SSL server config (#49280)
This commit adds a deprecation warning when starting
a node where either of the server contexts
(xpack.security.transport.ssl and xpack.security.http.ssl)
meet either of these conditions:

1. The server lacks a certificate/key pair (i.e. neither
   ssl.keystore.path not ssl.certificate are configured)
2. The server has some ssl configuration, but ssl.enabled is not
   specified. This new validation does not care whether ssl.enabled is
   true or false (though other validation might), it simply makes it
   an error to configure server SSL without being explicit about
   whether to enable that configuration.

Backport of: #45892
2019-11-22 12:14:55 +11:00
Jay Modi eed4cd25eb
ThreadPool and ThreadContext are not closeable (#43249) (#49273)
This commit changes the ThreadContext to just use a regular ThreadLocal
over the lucene CloseableThreadLocal. The CloseableThreadLocal solves
issues with ThreadLocals that are no longer needed during runtime but
in the case of the ThreadContext, we need it for the runtime of the
node and it is typically not closed until the node closes, so we miss
out on the benefits that this class provides.

Additionally by removing the close logic, we simplify code in other
places that deal with exceptions and tracking to see if it happens when
the node is closing.

Closes #42577
2019-11-19 13:15:16 -07:00
Albert Zaharovits 89b3c32b40
Audit log filter and marker (#49145)
This adds a log marker and a marker filter for the audit log.

Closes #47251
2019-11-15 08:44:09 -05:00
Ioannis Kakavas f5f0e1366a
Handle unexpected/unchecked exceptions correctly (#49080) (#49137)
Ensures that methods that are called from different threads ( i.e.
from the callbacks of org.apache.http.concurrent.FutureCallback )
catch `Exception` instead of only the expected checked exceptions.

This resolves a bug where OpenIdConnectAuthenticator#mergeObjects
would throw an IllegalStateException that was never caught causing
the thread to hang and the listener to never be called. This would
in turn cause Kibana requests to authenticate with OpenID Connect
to timeout and fail without even logging anything relevant.

This also guards against unexpected Exceptions that might be thrown
by invoked library methods while performing the necessary operations
in these callbacks.
2019-11-15 11:54:08 +02:00
Rory Hunter c46a0e8708
Apply 2-space indent to all gradle scripts (#49071)
Backport of #48849. Update `.editorconfig` to make the Java settings the
default for all files, and then apply a 2-space indent to all `*.gradle`
files. Then reformat all the files.
2019-11-14 11:01:23 +00:00
Ioannis Kakavas 4405042900
Remove unnecessary details logged for OIDC (#48746) (#49031)
This commit removes unnecessary details logged for
OIDC.

Co-Authored-By: Ioannis Kakavas <ikakavas@protonmail.com>
2019-11-13 13:43:56 +02:00
Mark Vieira 6ab4645f4e
[7.x] Introduce type-safe and consistent pattern for handling build globals (#48818)
This commit introduces a consistent, and type-safe manner for handling
global build parameters through out our build logic. Primarily this
replaces the existing usages of extra properties with static accessors.
It also introduces and explicit API for initialization and mutation of
any such parameters, as well as better error handling for uninitialized
or eager access of parameter values.

Closes #42042
2019-11-01 11:33:11 -07:00
Ioannis Kakavas 99aedc844d
Copy http headers to ThreadContext strictly (#45945) (#48675)
Previous behavior while copying HTTP headers to the ThreadContext,
would allow multiple HTTP headers with the same name, handling only
the first occurrence and disregarding the rest of the values. This
can be confusing when dealing with multiple Headers as it is not
obvious which value is read and which ones are silently dropped.

According to RFC-7230, a client must not send multiple header fields
with the same field name in a HTTP message, unless the entire field
value for this header is defined as a comma separated list or this
specific header is a well-known exception.

This commits changes the behavior in order to be more compliant to
the aforementioned RFC by requiring the classes that implement
ActionPlugin to declare if a header can be multi-valued or not when
registering this header to be copied over to the ThreadContext in
ActionPlugin#getRestHeaders.
If the header is allowed to be multivalued, then all such headers
are read from the HTTP request and their values get concatenated in
a comma-separated string.
If the header is not allowed to be multivalued, and the HTTP
request contains multiple such Headers with different values, the
request is rejected with a 400 status.
2019-10-31 23:05:12 +02:00
Yogesh Gaikwad c7342dde29
Fix to release system resource after reading JKWSet file (#48666) (#48677)
When we load a JSON Web Key (JWKSet) from the specified
file using JWKSet.load it internally uses IOUtils.readFileToString
but the opened FileInputStream is never closed after usage.
https://bitbucket.org/connect2id/nimbus-jose-jwt/issues/342

This commit reads the file and parses the JWKSet from the string.

This also fixes an issue wherein if the underlying file changed,
for every change event it would add another file watcher. The
change is to only add the file watcher at the start.

Closes #44942
2019-10-31 10:16:33 +11:00
Yogesh Gaikwad 9ed7352a12
Add Sysprop to Adjust IO Buffer Size (#48267) (#48667)
The 1MB IO-buffer size per transport thread is causing trouble in
some tests, albeit at a low rate. Reducing the number of transport
threads was not enough to fully fix this situation.
Allowing to configure the size of the buffer and reducing it by
more than an order of magnitude should fix these tests.

Closes #46803
2019-10-30 14:19:54 +11:00
Ioannis Kakavas a0362153e2
Update oauth2-oidc-sdk and nimbus-jose-jwt (#48537) (#48628)
Update two dependencies for our OpenID Connect realm implementation
to their latest versions
2019-10-29 14:18:59 +02:00
Rory Hunter 30389c6660
Improve SAML tests resiliency to auto-formatting (#48517)
Backport of #48452.

The SAML tests have large XML documents within which various parameters
are replaced. At present, if these test are auto-formatted, the XML
documents get strung out over many, many lines, and are basically
illegible.

Fix this by using named placeholders for variables, and indent the
multiline XML documents.

The tests in `SamlSpMetadataBuilderTests` deserve a special mention,
because they include a number of certificates in Base64. I extracted
these into variables, for additional legibility.
2019-10-27 16:06:23 +00:00
Tim Brooks f5f1072824
Multiple remote connection strategy support (#48496)
* Extract remote "sniffing" to connection strategy (#47253)

Currently the connection strategy used by the remote cluster service is
implemented as a multi-step sniffing process in the
RemoteClusterConnection. We intend to introduce a new connection strategy
that will operate in a different manner. This commit extracts the
sniffing logic to a dedicated strategy class. Additionally, it implements
dedicated tests for this class.

Additionally, in previous commits we moved away from a world where the
remote cluster connection was mutable. Instead, when setting updates are
made, the connection is torn down and rebuilt. We still had methods and
tests hanging around for the mutable behavior. This commit removes those.

* Introduce simple remote connection strategy (#47480)

This commit introduces a simple remote connection strategy which will
open remote connections to a configurable list of user supplied
addresses. These addresses can be remote Elasticsearch nodes or
intermediate proxies. We will perform normal clustername and version
validation, but otherwise rely on the remote cluster to route requests
to the appropriate remote node.

* Make remote setting updates support diff strategies (#47891)

Currently the entire remote cluster settings infrastructure is designed
around the sniff strategy. As we introduce an additional conneciton
strategy this infrastructure needs to be modified to support it. This
commit modifies the code so that the strategy implementations will tell
the service if the connection needs to be torn down and rebuilt.

As part of this commit, we will wait 10 seconds for new clusters to
connect when they are added through the "update" settings
infrastructure.

* Make remote setting updates support diff strategies (#47891)

Currently the entire remote cluster settings infrastructure is designed
around the sniff strategy. As we introduce an additional conneciton
strategy this infrastructure needs to be modified to support it. This
commit modifies the code so that the strategy implementations will tell
the service if the connection needs to be torn down and rebuilt.

As part of this commit, we will wait 10 seconds for new clusters to
connect when they are added through the "update" settings
infrastructure.
2019-10-25 09:29:41 -06:00