Changelog for 8.18.8

Author: ebeahan

changelog/8.18.8.yaml

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+version: 8.18.8
+entries:
+    - kind: enhancement
+      summary: agent cleans up downloads directory and the new versioned home if upgrade fails
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9386
+      issue:
+        - https://github.com/elastic/elastic-agent/issues/5235
+      impact: ""
+      action: ""
+      timestamp: 1755268130
+      file:
+        name: 1755268130-cleanup-downloads-directory-and-the-new-versioned-home-if-upgrade-fails.yaml
+        checksum: 5d9cdb7ac38cde4951de2c63368b504161601607
+    - kind: enhancement
+      summary: when there is a disk space error during an upgrade, agent responds with clean insufficient disk space error message
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9392
+      issue:
+        - https://github.com/elastic/elastic-agent/issues/5235
+      impact: ""
+      action: ""
+      timestamp: 1757010848
+      file:
+        name: 1757010848-agent-responds-with-clean-insufficient-disk-space-error-message.yaml
+        checksum: f56341e6c991397a73bc108a1f7b3db04c6a3abc
+    - kind: bug-fix
+      summary: Include aggregated agent status in HTTP liveness checks
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9673
+      issue:
+        - https://github.com/elastic/elastic-agent/issues/9576
+      impact: ""
+      action: ""
+      timestamp: 1757502748
+      file:
+        name: 1757502748-liveness-include-agent-aggregated-status.yaml
+        checksum: 7f059a7bc06c911463fcb96cfc0c077d3e1c7d62
+    - kind: bug-fix
+      summary: reduce-default-telemetry-frequency
+      description: Reduce the default telemetry frequency to 60 seconds. This change aims to lower infrastructure costs and reduce label churn in time-series storage. High-cardinality labels sampled too frequently inflate storage and index size, and increase query latency with limited added value. Environments that require higher resolution can change the `collection_interval` for `hostmetrics`, `kubeletstats` and `k8s_cluster` receivers to a lower value.
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9987
+      issue: []
+      impact: ""
+      action: ""
+      timestamp: 1758039757
+      file:
+        name: 1758039757-reduce-default-telemetry-frequency.yaml
+        checksum: b898653d4d803506feb56c9aac563e3615f46ffe
+    - kind: bug-fix
+      summary: Fix stuck upgrade state by clearing coordinator overridden state after failed upgrade
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/9992
+      issue: []
+      impact: ""
+      action: ""
+      timestamp: 1758045690
+      file:
+        name: 1758045690-clear-coordinator-state.yaml
+        checksum: f91a0478a6a6a49b3e6e0bb974f3341ca1ce0677
+    - kind: bug-fix
+      summary: Include components units status in HTTP liveness checks
+      description: ""
+      component: elastic-agent
+      pr:
+        - https://github.com/elastic/elastic-agent/pull/10158
+        - https://github.com/elastic/elastic-agent/pull/10207
+        - https://github.com/elastic/elastic-agent/pull/10264
+        - https://github.com/elastic/elastic-agent/pull/10265
+        - https://github.com/elastic/elastic-agent/pull/10060
+      issue:
+        - https://github.com/elastic/elastic-agent/issues/8047
+      impact: ""
+      action: ""
+      timestamp: 1758287649
+      file:
+        name: 1758287649-fix-liveness_units.yaml
+        checksum: 56d3167373e1447971495c4d8fc7aacf534b2ab0

changelog/8.18.8/breaking.md

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+## 8.18.8 [-8.18.8-breaking-changes]
+
+_No breaking changes._

changelog/8.18.8/deprecations.md

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+## 8.18.8 [-8.18.8-deprecations]
+
+_No deprecations._

changelog/8.18.8/index.md

@@ -0,0 +1,18 @@
+## 8.18.8 [-release-notes-8.18.8]
+
+
+### Features and enhancements [-8.18.8-features-enhancements]
+
+* Agent cleans up downloads directory and the new versioned home if upgrade fails. [#9386](https://github.com/elastic/elastic-agent/pull/9386) [#5235](https://github.com/elastic/elastic-agent/issues/5235)
+* When there is a disk space error during an upgrade, agent responds with clean insufficient disk space error message. [#9392](https://github.com/elastic/elastic-agent/pull/9392) [#5235](https://github.com/elastic/elastic-agent/issues/5235)
+
+
+### Fixes [-8.18.8-fixes]
+
+* Include aggregated agent status in HTTP liveness checks. [#9673](https://github.com/elastic/elastic-agent/pull/9673) [#9576](https://github.com/elastic/elastic-agent/issues/9576)
+* Reduce-default-telemetry-frequency. [#9987](https://github.com/elastic/elastic-agent/pull/9987) 
+
+  Reduce the default telemetry frequency to 60 seconds. This change aims to lower infrastructure costs and reduce label churn in time-series storage. High-cardinality labels sampled too frequently inflate storage and index size, and increase query latency with limited added value. Environments that require higher resolution can change the `collection_interval` for `hostmetrics`, `kubeletstats` and `k8s_cluster` receivers to a lower value.
+* Fix stuck upgrade state by clearing coordinator overridden state after failed upgrade. [#9992](https://github.com/elastic/elastic-agent/pull/9992) 
+* Include components units status in HTTP liveness checks. [#10158](https://github.com/elastic/elastic-agent/pull/10158) [#10207](https://github.com/elastic/elastic-agent/pull/10207) [#10264](https://github.com/elastic/elastic-agent/pull/10264) [#10265](https://github.com/elastic/elastic-agent/pull/10265) [#10060](https://github.com/elastic/elastic-agent/pull/10060) [#8047](https://github.com/elastic/elastic-agent/issues/8047)
+