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[7.x] Add Snapshot Lifecycle Management (#44382)
* Add Snapshot Lifecycle Management (#43934) * Add SnapshotLifecycleService and related CRUD APIs This commit adds `SnapshotLifecycleService` as a new service under the ilm plugin. This service handles snapshot lifecycle policies by scheduling based on the policies defined schedule. This also includes the get, put, and delete APIs for these policies Relates to #38461 * Make scheduledJobIds return an immutable set * Use Object.equals for SnapshotLifecyclePolicy * Remove unneeded TODO * Implement ToXContentFragment on SnapshotLifecyclePolicyItem * Copy contents of the scheduledJobIds * Handle snapshot lifecycle policy updates and deletions (#40062) (Note this is a PR against the `snapshot-lifecycle-management` feature branch) This adds logic to `SnapshotLifecycleService` to handle updates and deletes for snapshot policies. Policies with incremented versions have the old policy cancelled and the new one scheduled. Deleted policies have their schedules cancelled when they are no longer present in the cluster state metadata. Relates to #38461 * Take a snapshot for the policy when the SLM policy is triggered (#40383) (This is a PR for the `snapshot-lifecycle-management` branch) This commit fills in `SnapshotLifecycleTask` to actually perform the snapshotting when the policy is triggered. Currently there is no handling of the results (other than logging) as that will be added in subsequent work. This also adds unit tests and an integration test that schedules a policy and ensures that a snapshot is correctly taken. Relates to #38461 * Record most recent snapshot policy success/failure (#40619) Keeping a record of the results of the successes and failures will aid troubleshooting of policies and make users more confident that their snapshots are being taken as expected. This is the first step toward writing history in a more permanent fashion. * Validate snapshot lifecycle policies (#40654) (This is a PR against the `snapshot-lifecycle-management` branch) With the commit, we now validate the content of snapshot lifecycle policies when the policy is being created or updated. This checks for the validity of the id, name, schedule, and repository. Additionally, cluster state is checked to ensure that the repository exists prior to the lifecycle being added to the cluster state. Part of #38461 * Hook SLM into ILM's start and stop APIs (#40871) (This pull request is for the `snapshot-lifecycle-management` branch) This change allows the existing `/_ilm/stop` and `/_ilm/start` APIs to also manage snapshot lifecycle scheduling. When ILM is stopped all scheduled jobs are cancelled. Relates to #38461 * Add tests for SnapshotLifecyclePolicyItem (#40912) Adds serialization tests for SnapshotLifecyclePolicyItem. * Fix improper import in build.gradle after master merge * Add human readable version of modified date for snapshot lifecycle policy (#41035) * Add human readable version of modified date for snapshot lifecycle policy This small change changes it from: ``` ... "modified_date": 1554843903242, ... ``` To ``` ... "modified_date" : "2019-04-09T21:05:03.242Z", "modified_date_millis" : 1554843903242, ... ``` Including the `"modified_date"` field when the `?human` field is used. Relates to #38461 * Fix test * Add API to execute SLM policy on demand (#41038) This commit adds the ability to perform a snapshot on demand for a policy. This can be useful to take a snapshot immediately prior to performing some sort of maintenance. ```json PUT /_ilm/snapshot/<policy>/_execute ``` And it returns the response with the generated snapshot name: ```json { "snapshot_name" : "production-snap-2019.04.09-rfyv3j9qreixkdbnfuw0ug" } ``` Note that this does not allow waiting for the snapshot, and the snapshot could still fail. It *does* record this information into the cluster state similar to a regularly trigged SLM job. Relates to #38461 * Add next_execution to SLM policy metadata (#41221) * Add next_execution to SLM policy metadata This adds the next time a snapshot lifecycle policy will be executed when retriving a policy's metadata, for example: ```json GET /_ilm/snapshot?human { "production" : { "version" : 1, "modified_date" : "2019-04-15T21:16:21.865Z", "modified_date_millis" : 1555362981865, "policy" : { "name" : "<production-snap-{now/d}>", "schedule" : "*/30 * * * * ?", "repository" : "repo", "config" : { "indices" : [ "foo-*", "important" ], "ignore_unavailable" : true, "include_global_state" : false } }, "next_execution" : "2019-04-15T21:16:30.000Z", "next_execution_millis" : 1555362990000 }, "other" : { "version" : 1, "modified_date" : "2019-04-15T21:12:19.959Z", "modified_date_millis" : 1555362739959, "policy" : { "name" : "<other-snap-{now/d}>", "schedule" : "0 30 2 * * ?", "repository" : "repo", "config" : { "indices" : [ "other" ], "ignore_unavailable" : false, "include_global_state" : true } }, "next_execution" : "2019-04-16T02:30:00.000Z", "next_execution_millis" : 1555381800000 } } ``` Relates to #38461 * Fix and enhance tests * Figured out how to Cron * Change SLM endpoint from /_ilm/* to /_slm/* (#41320) This commit changes the endpoint for snapshot lifecycle management from: ``` GET /_ilm/snapshot/<policy> ``` to: ``` GET /_slm/policy/<policy> ``` It mimics the ILM path only using `slm` instead of `ilm`. Relates to #38461 * Add initial documentation for SLM (#41510) * Add initial documentation for SLM This adds the initial documentation for snapshot lifecycle management. It also includes the REST spec API json files since they're sort of documentation. Relates to #38461 * Add `manage_slm` and `read_slm` roles (#41607) * Add `manage_slm` and `read_slm` roles This adds two more built in roles - `manage_slm` which has permission to perform any of the SLM actions, as well as stopping, starting, and retrieving the operation status of ILM. `read_slm` which has permission to retrieve snapshot lifecycle policies as well as retrieving the operation status of ILM. Relates to #38461 * Add execute to the test * Fix ilm -> slm typo in test * Record SLM history into an index (#41707) It is useful to have a record of the actions that Snapshot Lifecycle Management takes, especially for the purposes of alerting when a snapshot fails or has not been taken successfully for a certain amount of time. This adds the infrastructure to record SLM actions into an index that can be queried at leisure, along with a lifecycle policy so that this history does not grow without bound. Additionally, SLM automatically setting up an index + lifecycle policy leads to `index_lifecycle` custom metadata in the cluster state, which some of the ML tests don't know how to deal with due to setting up custom `NamedXContentRegistry`s. Watcher would cause the same problem, but it is already disabled (for the same reason). * High Level Rest Client support for SLM (#41767) * High Level Rest Client support for SLM This commit add HLRC support for SLM. Relates to #38461 * Fill out documentation tests with tags * Add more callouts and asciidoc for HLRC * Update javadoc links to real locations * Add security test testing SLM cluster privileges (#42678) * Add security test testing SLM cluster privileges This adds a test to `PermissionsIT` that uses the `manage_slm` and `read_slm` cluster privileges. Relates to #38461 * Don't redefine vars * Add Getting Started Guide for SLM (#42878) This commit adds a basic Getting Started Guide for SLM. * Include SLM policy name in Snapshot metadata (#43132) Keep track of which SLM policy in the metadata field of the Snapshots taken by SLM. This allows users to more easily understand where the snapshot came from, and will enable future SLM features such as retention policies. * Fix compilation after master merge * [TEST] Move exception wrapping for devious exception throwing Fixes an issue where an exception was created from one line and thrown in another. * Fix SLM for the change to AcknowledgedResponse * Add Snapshot Lifecycle Management Package Docs (#43535) * Fix compilation for transport actions now that task is required * Add a note mentioning the privileges needed for SLM (#43708) * Add a note mentioning the privileges needed for SLM This adds a note to the top of the "getting started with SLM" documentation mentioning that there are two built-in privileges to assist with creating roles for SLM users and administrators. Relates to #38461 * Mention that you can create snapshots for indices you can't read * Fix REST tests for new number of cluster privileges * Mute testThatNonExistingTemplatesAreAddedImmediately (#43951) * Fix SnapshotHistoryStoreTests after merge * Remove overridden newResponse functions that have been removed * Fix compilation for backport * Fix get snapshot output parsing in test * [DOCS] Add redirects for removed autogen anchors (#44380) * Switch <tt>...</tt> in javadocs for {@code ...}
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