restore main version

README.md

@@ -15,8 +15,8 @@ in the [observability-docs](https://github.com/elastic/observability-docs) repo.
 
 ### Changelog
 
-The changelog for the Elastic Agent is generated and maintained using the [elastic-agent-changelog-tool](https://github.com/elastic/elastic-agent-changelog-tool). Read the [installation](https://github.com/elastic/elastic-agent-changelog-tool/blob/8.10/docs/install.md)
-and [usage](https://github.com/elastic/elastic-agent-changelog-tool/blob/8.10/docs/usage.md#im-a-developer) instructions to get started.
+The changelog for the Elastic Agent is generated and maintained using the [elastic-agent-changelog-tool](https://github.com/elastic/elastic-agent-changelog-tool). Read the [installation](https://github.com/elastic/elastic-agent-changelog-tool/blob/main/docs/install.md)
+and [usage](https://github.com/elastic/elastic-agent-changelog-tool/blob/main/docs/usage.md#im-a-developer) instructions to get started.
 
 The changelog tool produces fragement files that are consolidated to generate a changelog for each release. Each PR containing a change with user
 impact (new feature, bug fix, etc.) must contain a changelog fragement describing the change. There is a GitHub action in CI that will fail
@@ -36,7 +36,7 @@ pr: https://github.com/elastic/elastic-agent/pull/823
 Prerequisites:
 - installed [mage](https://github.com/magefile/mage)
 - [Docker](https://docs.docker.com/get-docker/)
-- [X-pack](https://github.com/elastic/beats/tree/8.10/x-pack) to pre-exist in the parent folder of the local Git repository checkout
+- [X-pack](https://github.com/elastic/beats/tree/main/x-pack) to pre-exist in the parent folder of the local Git repository checkout
 - [elastic-agent-changelog-tool](https://github.com/elastic/elastic-agent-changelog-tool) to add changelog fragments for changelog generation
 
 To build a local version of the agent for development, run the command below. The following platforms are supported:
@@ -89,10 +89,10 @@ for the standard variant.
 ### Testing Elastic Agent on Kubernetes
 
 #### Prerequisites
-- create kubernetes cluster using kind, check [here](https://github.com/elastic/beats/blob/8.10/metricbeat/module/kubernetes/_meta/test/docs/README.md) for details
-- deploy kube-state-metrics, check [here](https://github.com/elastic/beats/blob/8.10/metricbeat/module/kubernetes/_meta/test/docs/README.md) for details
+- create kubernetes cluster using kind, check [here](https://github.com/elastic/beats/blob/main/metricbeat/module/kubernetes/_meta/test/docs/README.md) for details
+- deploy kube-state-metrics, check [here](https://github.com/elastic/beats/blob/main/metricbeat/module/kubernetes/_meta/test/docs/README.md) for details
 - deploy required infrastructure:
-    - for elastic agent in standalone mode: EK stack or use [elastic cloud](https://cloud.elastic.co), check [here](https://github.com/elastic/beats/blob/8.10/metricbeat/module/kubernetes/_meta/test/docs/README.md) for details
+    - for elastic agent in standalone mode: EK stack or use [elastic cloud](https://cloud.elastic.co), check [here](https://github.com/elastic/beats/blob/main/metricbeat/module/kubernetes/_meta/test/docs/README.md) for details
     - for managed mode: use [elastic cloud](https://cloud.elastic.co) or bring up the stack on docker and then connect docker network with kubernetes kind nodes:
   ```
   elastic-package stack up -d -v

deploy/kubernetes/Makefile

@@ -1,7 +1,7 @@
 ALL=elastic-agent-standalone elastic-agent-managed
 
 BEAT_VERSION=$(shell grep '^:stack-version:' ../../version/docs/version.asciidoc | cut -c 17- )
-BRANCH_VERSION=$(shell grep '^:stack-version:' ../../version/docs/version.asciidoc | cut -c 17- )
+BRANCH_VERSION=$(shell grep '^:doc-branch:' ../../version/docs/version.asciidoc | cut -c 14- )
 
 #variables needed for ci-create-kubernetes-templates-pull-request
 ELASTIC_AGENT_REPO=kibana
@@ -117,4 +117,4 @@ $(ALL):
 else
 	echo "No KSM templates generated. Please run: KUSTOMIZE=tue make ci-create-kustomize "
 
-endif
+endif

deploy/kubernetes/elastic-agent-managed-kubernetes.yaml

@@ -30,7 +30,7 @@ spec:
       dnsPolicy: ClusterFirstWithHostNet
       containers:
         - name: elastic-agent
-          image: docker.elastic.co/beats/elastic-agent:8.10.0
+          image: docker.elastic.co/beats/elastic-agent:8.8.1
           env:
             # Set to 1 for enrollment into Fleet server. If not set, Elastic Agent is run in standalone mode
             - name: FLEET_ENROLL

deploy/kubernetes/elastic-agent-standalone-kubernetes.yaml

@@ -683,13 +683,13 @@ spec:
       #      - -c
       #      - >-
       #        mkdir -p /etc/elastic-agent/inputs.d &&
-      #        wget -O - https://github.com/elastic/elastic-agent/archive/8.10.0.tar.gz | tar xz -C /etc/elastic-agent/inputs.d --strip=5 "elastic-agent-8.10.0/deploy/kubernetes/elastic-agent-standalone/templates.d"
+      #        wget -O - https://github.com/elastic/elastic-agent/archive/main.tar.gz | tar xz -C /etc/elastic-agent/inputs.d --strip=5 "elastic-agent-main/deploy/kubernetes/elastic-agent-standalone/templates.d"
       #    volumeMounts:
       #      - name: external-inputs
       #        mountPath: /etc/elastic-agent/inputs.d
       containers:
         - name: elastic-agent-standalone
-          image: docker.elastic.co/beats/elastic-agent:8.10.0
+          image: docker.elastic.co/beats/elastic-agent:8.8.1
           args: ["-c", "/etc/elastic-agent/agent.yml", "-e"]
           env:
             # The basic authentication username used to connect to Elasticsearch