Install Elastic Agent in Kubernetes cluster in compatible stack version

[mtojek]

Fixes: #567

Kubernetes service deployer selects the stack version based on the running Kibana:

[2021-11-03T08:31:55.324Z] 2021/11/03 08:31:54 DEBUG install Elastic Agent in the Kubernetes cluster
[2021-11-03T08:31:55.324Z] 2021/11/03 08:31:54 DEBUG GET http://127.0.0.1:5601/login
[2021-11-03T08:31:55.324Z] 2021/11/03 08:31:54 DEBUG Prepare YAML definition for Elastic Agent running in stack v7.15.1
[2021-11-03T08:31:55.324Z] 2021/11/03 08:31:54 DEBUG Apply Kubernetes stdin
[2021-11-03T08:31:55.324Z] 2021/11/03 08:31:54 DEBUG run command: /var/lib/jenkins/workspace/PR-569-2-05934679-d7fa-4f01-8c4c-248efecf3bf3/bin/kubectl apply -f - -o yaml
[2021-11-03T08:31:55.324Z] 2021/11/03 08:31:55 DEBUG Handle "apply" command output
[2021-11-03T08:31:55.324Z] 2021/11/03 08:31:55 DEBUG Extract resources from command output
[2021-11-03T08:31:55.324Z] 2021/11/03 08:31:55 DEBUG Wait for ready resources
[2021-11-03T08:31:55.324Z] 2021/11/03 08:31:55 DEBUG Sync resource info: elastic-agent (kind: DaemonSet, namespace: kube-system)
[2021-11-03T08:31:55.324Z] 2021/11/03 08:31:55 DEBUG Sync resource info: elastic-agent (kind: ClusterRoleBinding, namespace: )
[2021-11-03T08:31:55.324Z] 2021/11/03 08:31:55 DEBUG Sync resource info: elastic-agent (kind: RoleBinding, namespace: kube-system)
[2021-11-03T08:31:55.324Z] 2021/11/03 08:31:55 DEBUG Sync resource info: elastic-agent-kubeadm-config (kind: RoleBinding, namespace: kube-system)
[2021-11-03T08:31:55.591Z] 2021/11/03 08:31:55 DEBUG Sync resource info: elastic-agent (kind: ClusterRole, namespace: )
[2021-11-03T08:31:55.591Z] 2021/11/03 08:31:55 DEBUG Sync resource info: elastic-agent (kind: Role, namespace: kube-system)
[2021-11-03T08:31:55.591Z] 2021/11/03 08:31:55 DEBUG Sync resource info: elastic-agent-kubeadm-config (kind: Role, namespace: kube-system)
[2021-11-03T08:31:55.591Z] 2021/11/03 08:31:55 DEBUG Sync resource info: elastic-agent (kind: ServiceAccount, namespace: kube-system)
[2021-11-03T08:31:55.591Z] 2021/11/03 08:31:55 DEBUG beginning wait for 8 resources with timeout of 10m0s

[elasticmachine]

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• Start Time: 2021-11-03T10:49:58.899+0000

• Duration: 37 min 20 sec

• Commit: 601278d

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Test	Results
Failed	0
Passed	439
Skipped	4
Total	443

🤖 GitHub comments

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[ChrsMark]

LGTM

[jsoriano]

Nit. Not sure if this injected metadata is something documented or long term supported. We could have a method to get the kibana version, ever if under the hood there can be different methods in the future to discover it. But we can also wait for this future, it may never come :)

Suggested change

	metadata, err := kibanaClient.InjectedMetadata()
	version, err := kibanaClient.Version()

[mtojek]

Sounds like a good idea, more future oriented :) I will adjust the code.

[mtojek]

Fixed

[jsoriano]

👍