[9.0](backport #9440) [docs] Add Markdown release notes

changelog/9.0.5.yaml

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+version: 9.0.5
+entries:

changelog/9.1.1.yaml

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+version: 9.1.1
+entries:
+    - kind: feature
+      summary: Add k8s leader elector Otel extension
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9261
+        - https://github.com/elastic/elastic-agent/pull/9262
+        - https://github.com/elastic/elastic-agent/pull/9065
+      issue: []
+      timestamp: 1752827328
+      file:
+        name: 1752827328-add_k8sleaderelector_extension.yaml
+        checksum: 2dae784245fbcf96055c2a2898fe911ce2eeaea9
+    - kind: bug-fix
+      summary: Don't overwrite elasticsearch output headers from enrollment --headers flag
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9199
+      issue:
+        - https://github.com/elastic/elastic-agent/issues/9197
+      timestamp: 1753906482
+      file:
+        name: 1753906482-Don't-overwrite-elasticsearch-output-headers-from-enrollment---headers-flag.yaml
+        checksum: 4f8875518a619395bdb606081ee392ea2b76f70f

changelog/9.1.2.yaml

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+version: 9.1.2
+entries:

changelog/9.1.3.yaml

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+version: 9.1.3
+entries:
+    - kind: feature
+      summary: Adjust the timeout for Elastic Defend check command
+      description: ""
+      component: ""
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9329
+        - https://github.com/elastic/elastic-agent/pull/9521
+        - https://github.com/elastic/elastic-agent/pull/9522
+        - https://github.com/elastic/elastic-agent/pull/9545
+        - https://github.com/elastic/elastic-agent/pull/9213
+      issue: []
+      timestamp: 1753950420
+      file:
+        name: 1753950420-adjust-endpoint-check-timeout.yaml
+        checksum: 8128c245da5eef165a531e45f95e3f964bbd1817
+    - kind: bug-fix
+      summary: On Windows, retry saving the Agent information file to disk
+      description: |
+        Saving the Agent information file involves renaming/moving a file to its final destination. However, on Windows, it is sometimes not possible to rename/move a file to its destination file because the destination file is locked by another process (e.g. antivirus software). For such situations, we now retry the save operation on Windows.
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9224
+      issue:
+        - https://github.com/elastic/elastic-agent/issues/5862
+      timestamp: 1754346816
+      file:
+        name: 1754346816-fleet-enc-save-retries.yaml
+        checksum: fab4b29d2404c210dcb1441eb88e84dd3f6c9ad1
+    - kind: bug-fix
+      summary: Correct hints annotations parsing to resolve only `${kubernetes.*}` placeholders instead of resolving all `${...}` patterns.
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9307
+      issue: []
+      timestamp: 1754944400
+      file:
+        name: 1754944400-k8s-hints-env-vars-in-annotations.yaml
+        checksum: 55ccb4d795ad7556a9c8ecad5bd33a0a0893042b
+    - kind: bug-fix
+      summary: Treat exit code 28 from Endpoint binary as non-fatal
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9320
+      issue: []
+      timestamp: 1755059673
+      file:
+        name: 1755059673-endpoint-28-not-fatal.yaml
+        checksum: d8fc4bbea824309297a7dcf508fd99fb62e86877
+    - kind: bug-fix
+      summary: Fixed jitter backoff strategy reset
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9342
+      issue:
+        - https://github.com/elastic/elastic-agent/issues/8864
+      timestamp: 1755076749
+      file:
+        name: 1755076749-fix-jitter-backoff-strategy-reset.yaml
+        checksum: 1969a9a0221227c476f94e27a4ef3946b3853416
+    - kind: enhancement
+      summary: Update OTel components to v0.130.0
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9329
+        - https://github.com/elastic/elastic-agent/pull/9521
+        - https://github.com/elastic/elastic-agent/pull/9522
+        - https://github.com/elastic/elastic-agent/pull/9545
+        - https://github.com/elastic/elastic-agent/pull/9362
+      issue: []
+      timestamp: 1755149089
+      file:
+        name: 1755149089-update-otel-components-to-v0.130.0.yaml
+        checksum: b3e16c76d7df9bc7724df86777bcc67bc88f8691
+    - kind: bug-fix
+      summary: 'Fix Docker container failing to start with no matching vars: ${env.ELASTICSEARCH_API_KEY:} and similar errors by restoring support for `:` to set default values.'
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9451
+      issue:
+        - https://github.com/elastic/elastic-agent/issues/9328
+      timestamp: 1755544412
+      file:
+        name: 1755544412-Fix-default-constant-support-in-output-configuration.yaml
+        checksum: 9b389ac54a3b8a7aaec24da9223bff8a306c4d8b
+    - kind: security
+      summary: Upgrade to Go 1.24.6.
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9287
+      issue: []
+      timestamp: 1755547590
+      file:
+        name: 1755547590-Upgrade-to-Go-1.24.6..yaml
+        checksum: e2f37c3bfe8bda55a0ec6c32cf604e44dc4f5d43
+    - kind: bug-fix
+      summary: Fix deb upgrade by stopping elastic-agent service before stopping endpoint
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9462
+      issue: []
+      timestamp: 1755601979
+      file:
+        name: 1755601979-deb-upgrade-stop-agent-service.yaml
+        checksum: fff4e813c33f7eccb8ebf9a49698781df5734b79

config.changelog.yaml

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+owner: elastic
+repo: elastic-agent
+rendered_changelog_destination: docs/release-notes/_snippets

docs/docset.yml

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+project: Elastic Agent docs
+products:
+  - id: elastic-agent
+exclude:
+  - "*.md"
+  - "manifests/kustomize-autosharding/README.md"
+cross_links:
+  - docs-content
+  - beats
+toc:
+  - toc: release-notes
+subs:
+  agent:          "Elastic Agent"
+  agent-issue:    "https://github.com/elastic/elastic-agent/issues/"
+  agent-pull:     "https://github.com/elastic/elastic-agent/pull/"
+  agents:         "Elastic Agents"
+  beats:          "Beats"
+  es:             "Elasticsearch"
+  fleet:          "Fleet"

docs/release-notes/_snippets/9.0.0/breaking.md

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+## 9.0.0 [elastic-agent-9.0.0-breaking-changes]
+
+::::{dropdown} Removed cloud defend support for {{agent}}
+Support for `cloud-defend` (Defend for Containers) has been removed. The package has been removed from the {{agent}} packaging scripts and template Kubernetes files.
+
+For more information, check [#5481]({{agent-pull}}5481).
+::::
+
+::::{dropdown} Removed username and password default values for {{agent}}
+The default values for `username` and `password` have been removed for when {{agent}} is running in container mode. The {{es}} `api_key` can now be set in that mode using the `ELASTICSEARCH_API_KEY` environment variable.
+
+For more information, check [#5536]({{agent-pull}}5536).
+::::
+
+::::{dropdown} Changed Ubuntu-based Docker images for {{agent}}
+The default Ubuntu-based Docker images used for {{agent}} have been changed to UBI-minimal-based images, to reduce the overall footprint of the agent Docker images and to improve compliance with enterprise standards.
+
+For more information, check [#6427]({{agent-pull}}6427).
+::::
+
+::::{dropdown} Removed --path.install flag declaration from {{agent}} paths command
+The deprecated `--path.install` flag declaration has been removed from the {{agent}} `paths` command and its use removed from the `container` and `enroll` commands.
+
+For more information, check [#6461]({{agent-pull}}6461) and [#2489]({{agent-pull}}2489).
+::::
+
+::::{dropdown} Changed the default {{agent}} installation and upgrade
+The default {{agent}} installation and ugprade have been changed to include only the `agentbeat`, `endpoint-security` and `pf-host-agent` components.
+
+Additional components such as `apm` or `fleet` require passing the `--install-servers` flag or setting the `ELASTIC_AGENT_FLAVOR=servers` environment variable.
+
+For more information, check [#6542]({{agent-pull}}6542).
+::::

docs/release-notes/_snippets/9.0.0/deprecations.md

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+## 9.0.0 [elastic-agent-9.0.0-deprecations]
+
+_No deprecations._

docs/release-notes/_snippets/9.0.0/index.md

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+## 9.0.0 [elastic-agent-9.0.0-release-notes]
+
+_This release also includes: [Breaking changes](/release-notes/breaking-changes.md#elastic-agent-9.0.0-breaking-changes)._
+
+### Features and enhancements [elastic-agent-9.0.0-features-enhancements]
+
+* Adds the Azure Asset Inventory definition to Cloudbeat for {{agent}} [#5323]({{agent-pull}}5323)
+* Adds Kubernetes deployment of the Elastic Distribution of OTel Collector named "gateway" to the Helm kube-stack deployment for {{agent}} [#6444]({{agent-pull}}6444)
+* Adds the filesource provider to composable inputs. The provider watches for changes of the files and updates the values of the variables when the content of the file changes for {{agent}} [#6587]({{agent-pull}}6587) and [#6362]({{agent-issue}}6362)
+* Adds the jmxreceiver to the Elastic Distribution of OTel Collector for {{agent}} [#6601]({{agent-pull}}6601)
+* Adds support for context variables in outputs as well as a default provider prefix for {{agent}} [#6602]({{agent-pull}}6602) and [#6376]({{agent-issue}}6376)
+* Adds the Nginx receiver and Redis receiver OTel components for {{agent}} [#6627]({{agent-pull}}6627)
+* Adds --id (ELASTIC_AGENT_ID environment variable for container) and --replace-token (FLEET_REPLACE_TOKEN environment variable for container) enrollment options for {{agent}} [#6498]({{agent-pull}}6498)
+* Updates Go version to 1.22.10 in {{agent}} [#6236]({{agent-pull}}6236)
+* Adds the Filebeat receiver into {{agent}} [#5833]({{agent-pull}}5833)
+* Updates OTel components to v0.119.0 in {{agent}} [#6713]({{agent-pull}}6713)
+
+### Fixes [elastic-agent-9.0.0-fixes]
+
+* Fixes logical race conditions in the kubernetes_secrets provider in {{agent}} [#6623]({{agent-pull}}6623)
+* Resolves the proxy to inject into agent component configurations using the Go http package in {{agent}} [#6675]({{agent-pull}}6675) and [#6209]({{agent-issue}}6209)

docs/release-notes/_snippets/9.0.1/breaking.md

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+## 9.0.1 [elastic-agent-9.0.1-breaking-changes]
+
+::::{dropdown} [otel] Disable process scraper of hostmetrics receiver.
+The process scraper collects metrics for all available processes of a host without an easy way to limit
+this to only report top N process for example. This results in quite big amount of timeseries.
+Since this is not quite critical for any of the available UIs or dashboards we decide to disable
+it temporarily until we find a better solution. Users that specifically need these metrics
+can also enable it back manually.
+Related to https://github.com/open-telemetry/opentelemetry-collector-contrib/issues/39423.
+
+
+For more information, check [#7894](https://github.com/elastic/elastic-agent/pull/7894).
+
+% **Impact**<br>_Add a description of the impact_
+
+% **Action**<br>_Add a description of the what action to take_
+::::

docs/release-notes/_snippets/9.0.1/deprecations.md

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+## 9.0.1 [elastic-agent-9.0.1-deprecations]
+
+_No deprecations._

docs/release-notes/_snippets/9.0.1/index.md

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+## 9.0.1 [elastic-agent-release-notes-9.0.1]
+
+_This release also includes: [Breaking changes](/release-notes/breaking-changes.md#elastic-agent-9.0.1-breaking-changes)._
+
+### Features and enhancements [elastic-agent-9.0.1-features-enhancements]
+
+* Add nopexporter to EDOT Collector. [#7788](https://github.com/elastic/elastic-agent/pull/7788) 
+* Set collectors fullnameOverride for edot kube-stack values. [#7754](https://github.com/elastic/elastic-agent/pull/7754) [#7381](https://github.com/elastic/elastic-agent/issues/7381)
+* Update OTel components to v0.121.0. [#7686](https://github.com/elastic/elastic-agent/pull/7686) 
+
+
+### Fixes [elastic-agent-9.0.1-fixes]
+
+* Fix Managed OTLP Helm config to use current image repo. [#7882](https://github.com/elastic/elastic-agent/pull/7882) 
+

docs/release-notes/_snippets/9.0.2/breaking.md

@@ -0,0 +1,3 @@
+## 9.0.2 [elastic-agent-9.0.2-breaking-changes]
+
+_No breaking changes._

docs/release-notes/_snippets/9.0.2/deprecations.md

@@ -0,0 +1,3 @@
+## 9.0.2 [elastic-agent-9.0.2-deprecations]
+
+_No deprecations._

docs/release-notes/_snippets/9.0.2/index.md

@@ -0,0 +1,13 @@
+## 9.0.2 [elastic-agent-release-notes-9.0.2]
+
+
+
+
+### Fixes [elastic-agent-9.0.2-fixes]
+
+* Upgrade Go version to 1.24.3. [#8109](https://github.com/elastic/elastic-agent/pull/8109) 
+* Preserve agent run state on DEB and RPM upgrades. [#7999](https://github.com/elastic/elastic-agent/pull/7999) [#3832](https://github.com/elastic/elastic-agent/issues/3832)
+
+  Improves the upgrade process for Elastic Agent installed using DEB or RPM packages by copying the run directory from the previous installation into the new version's folder
+
+

docs/release-notes/_snippets/9.0.3/breaking.md

@@ -0,0 +1,3 @@
+## 9.0.3 [elastic-agent-9.0.3-breaking-changes]
+
+_No breaking changes._

docs/release-notes/_snippets/9.0.3/deprecations.md

@@ -0,0 +1,3 @@
+## 9.0.3 [elastic-agent-9.0.3-deprecations]
+
+_No deprecations._

docs/release-notes/_snippets/9.0.3/index.md

@@ -0,0 +1,17 @@
+## 9.0.3 [elastic-agent-release-notes-9.0.3]
+
+
+### Features and enhancements [elastic-agent-9.0.3-features-enhancements]
+
+* Add cumulativetodeltaprocessor to EDOT collector. [#8352](https://github.com/elastic/elastic-agent/pull/8352) [#8573](https://github.com/elastic/elastic-agent/pull/8573) [#8575](https://github.com/elastic/elastic-agent/pull/8575) [#8616](https://github.com/elastic/elastic-agent/pull/8616) [#8372](https://github.com/elastic/elastic-agent/pull/8372) 
+
+
+### Fixes [elastic-agent-9.0.3-fixes]
+
+* Address a race condition that can occur in Agent diagnostics if log rotation runs while logs are being zipped. [#8215](https://github.com/elastic/elastic-agent/pull/8215) 
+* Use paths.TempDir for diagnostics actions. [#8472](https://github.com/elastic/elastic-agent/pull/8472) 
+* Relax file ownership check to allow admin re-enrollment on Windows. [#8503](https://github.com/elastic/elastic-agent/pull/8503) [#7794](https://github.com/elastic/elastic-agent/issues/7794)
+
+  On Windows, the agent previously enforced a strict file ownership (SID) check during re-enrollment, which prevented legitimate admin users from re-enrolling the agent if the owner did not match. This PR changes the Windows-specific logic to a no-op, allowing any admin to re-enroll the agent. This restores usability for admin users, but reintroduces the risk that privileged re-enrollment can break unprivileged installs. The Unix-specific ownership check remains unchanged.
+
+

docs/release-notes/_snippets/9.0.4/breaking.md

@@ -0,0 +1,3 @@
+## 9.0.4 [elastic-agent-9.0.4-breaking-changes]
+
+_No breaking changes._

docs/release-notes/_snippets/9.0.4/deprecations.md

@@ -0,0 +1,3 @@
+## 9.0.4 [elastic-agent-9.0.4-deprecations]
+
+_No deprecations._

docs/release-notes/_snippets/9.0.4/index.md

@@ -0,0 +1,17 @@
+## 9.0.4 [elastic-agent-release-notes-9.0.4]
+
+
+### Features and enhancements [elastic-agent-9.0.4-features-enhancements]
+
+* Add file logs only managed OTLP input kube-stack configuration. [#8785](https://github.com/elastic/elastic-agent/pull/8785) 
+
+
+### Fixes [elastic-agent-9.0.4-fixes]
+
+* Remove incorrect logging that unprivileged installations are in beta. [#8715](https://github.com/elastic/elastic-agent/pull/8715) [#8689](https://github.com/elastic/elastic-agent/issues/8689)
+
+  Unprivileged installations went GA in 8.15.0: https://www.elastic.co/docs/reference/fleet/elastic-agent-unprivileged
+* Ensure standalone Elastic Agent uses log level from configuration instead of persisted state. [#8784](https://github.com/elastic/elastic-agent/pull/8784) [#8137](https://github.com/elastic/elastic-agent/issues/8137)
+* Resolve deadlocks in runtime checkin communication. [#8881](https://github.com/elastic/elastic-agent/pull/8881) [#7944](https://github.com/elastic/elastic-agent/issues/7944)
+* Removed init.d support from RPM packages. [#8896](https://github.com/elastic/elastic-agent/pull/8896) [#8840](https://github.com/elastic/elastic-agent/issues/8840)
+

docs/release-notes/_snippets/9.0.5/breaking.md

@@ -0,0 +1,3 @@
+## 9.0.5 [elastic-agent-9.0.5-breaking-changes]
+
+_No breaking changes._

docs/release-notes/_snippets/9.0.5/deprecations.md

@@ -0,0 +1,3 @@
+## 9.0.5 [elastic-agent-9.0.5-deprecations]
+
+_No deprecations._

docs/release-notes/_snippets/9.0.5/index.md

@@ -0,0 +1,4 @@
+## 9.0.5 [elastic-agent-release-notes-9.0.5]
+
+
+_No new features, enhancements, or fixes._

docs/release-notes/_snippets/9.0.6/breaking.md

@@ -0,0 +1,3 @@
+## 9.0.6 [elastic-agent-9.0.6-breaking-changes]
+
+_No breaking changes._

docs/release-notes/_snippets/9.0.6/deprecations.md

@@ -0,0 +1,3 @@
+## 9.0.6 [elastic-agent-9.0.6-deprecations]
+
+_No deprecations._

docs/release-notes/_snippets/9.0.6/index.md

@@ -0,0 +1,21 @@
+## 9.0.6 [elastic-agent-release-notes-9.0.6]
+
+
+### Features and enhancements [elastic-agent-9.0.6-features-enhancements]
+
+* Adjust the timeout for Elastic Defend check command. [#9523](https://github.com/elastic/elastic-agent/pull/9523) [#9524](https://github.com/elastic/elastic-agent/pull/9524) [#9542](https://github.com/elastic/elastic-agent/pull/9542) [#9213](https://github.com/elastic/elastic-agent/pull/9213) 
+
+
+### Fixes [elastic-agent-9.0.6-fixes]
+
+* Upgrade to Go 1.24.6. [#9287](https://github.com/elastic/elastic-agent/pull/9287) 
+* On Windows, retry saving the Agent information file to disk. [#9224](https://github.com/elastic/elastic-agent/pull/9224) [#5862](https://github.com/elastic/elastic-agent/issues/5862)
+
+  Saving the Agent information file involves renaming/moving a file to its final destination. However, on Windows, it is sometimes not possible to rename/move a file to its destination file because the destination file is locked by another process (e.g. antivirus software). For such situations, we now retry the save operation on Windows.
+
+* Correct hints annotations parsing to resolve only `${kubernetes.*}` placeholders instead of resolving all `${...}` patterns. [#9307](https://github.com/elastic/elastic-agent/pull/9307) 
+* Treat exit code 28 from Endpoint binary as non-fatal. [#9320](https://github.com/elastic/elastic-agent/pull/9320) 
+* Fixed jitter backoff strategy reset. [#9342](https://github.com/elastic/elastic-agent/pull/9342) [#8864](https://github.com/elastic/elastic-agent/issues/8864)
+* Fix Docker container failing to start with no matching vars: ${env.ELASTICSEARCH_API_KEY:} and similar errors by restoring support for `:` to set default values. [#9451](https://github.com/elastic/elastic-agent/pull/9451) [#9328](https://github.com/elastic/elastic-agent/issues/9328)
+* Fix deb upgrade by stopping elastic-agent service before upgrading. [#9462](https://github.com/elastic/elastic-agent/pull/9462) 
+

docs/release-notes/_snippets/9.1.0/breaking.md

@@ -0,0 +1,3 @@
+## 9.1.0 [elastic-agent-9.1.0-breaking-changes]
+
+_No breaking changes._