Elastic Fleet Server Agent fails on startup

WookWook · November 18, 2022, 9:53am

Hi,
currently I want to evaluate Elastic APM, but first things first, I am trying to setup the Elastic Agent in Fleet-Managed mode which keeps constantly failing.

Managed Azure Redhat Openshift 4.9 // ECK 2.5

Right now I cant get this fixed.

Updating certificates in /etc/ssl/certs...
rehash: warning: skipping ca-certificates.crt,it does not contain exactly one certificate or CRL
1 added, 0 removed; done.
Running hooks in /etc/ca-certificates/update.d...
done.
Error: preparing STATE_PATH(/usr/share/elastic-agent/state) failed: mkdir /usr/share/elastic-agent/state/data: permission denied
For help, please see our troubleshooting guide at https://www.elastic.co/guide/en/fleet/8.5/fleet-troubleshooting.html

my config.yaml (just the necessary part, if more is needed, just let me know)

apiVersion: kibana.k8s.elastic.co/v1
kind: Kibana
metadata:
  name: kibana
spec:
  version: 8.5.1
  count: 1
  elasticsearchRef:
    name: elasticsearch
  config:
    xpack.fleet.agents.elasticsearch.hosts: ["https://elasticsearch-es-http.elastic.svc:9200"]
    xpack.fleet.agents.fleet_server.hosts: ["https://fleet-server-agent-http.elastic.svc:8220"]
    xpack.fleet.packages:
    - name: system
      version: latest
    - name: elastic_agent
      version: latest
    - name: fleet_server
      version: latest
    - name: kubernetes
      version: latest
    xpack.fleet.agentPolicies:
    - name: Fleet Server on ECK policy
      id: eck-fleet-server
      namespace: default
      monitoring_enabled:
      - logs
      - metrics
      unenroll_timeout: 900
      is_default_fleet_server: true
      package_policies:
      - name: fleet_server-1
        id: fleet_server-1
        package:
          name: fleet_server
    - name: Elastic Agent on ECK policy
      id: eck-agent
      namespace: default
      monitoring_enabled:
      - logs
      - metrics
      unenroll_timeout: 900
      is_default: true
      package_policies:
      - package:
          name: system
        name: system-1
      - package:
          name: kubernetes
        name: kubernetes-1
---
apiVersion: agent.k8s.elastic.co/v1alpha1
kind: Agent
metadata:
  name: fleet-server
  namespace: elastic
spec:
  version: 8.5.1
  kibanaRef:
    name: kibana
  elasticsearchRefs:
  - name: elasticsearch
  mode: fleet
  fleetServerEnabled: true
  deployment:
    replicas: 1
    podTemplate:
      spec:
        serviceAccountName: elastic-agent
        automountServiceAccountToken: true
        securityContext:
          runAsUser: 0
---
apiVersion: agent.k8s.elastic.co/v1alpha1
kind: Agent
metadata:
  name: elastic-agent
  namespace: elastic
spec:
  version: 8.5.1
  kibanaRef:
    name: kibana
  fleetServerRef:
    name: fleet-server
  mode: fleet
  daemonSet:
    podTemplate:
      spec:
        serviceAccountName: elastic-agent
        securityContext:
          runAsUser: 0
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: elastic-agent
rules:
- apiGroups: [""] # "" indicates the core API group
  resources:
  - pods
  - nodes
  - namespaces
  verbs:
  - get
  - watch
  - list
- apiGroups: ["coordination.k8s.io"]
  resources:
  - leases
  verbs:
  - get
  - create
  - update
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: elastic-agent
subjects:
- kind: ServiceAccount
  name: elastic-agent
  namespace: elastic
roleRef:
  kind: ClusterRole
  name: elastic-agent
  apiGroup: rbac.authorization.k8s.io

Regards,
Marius

Julia_Bardi · November 21, 2022, 10:30am

Hey, I found a similar issue on github, does this help?

github.com/elastic/cloud-on-k8s

ECK Quickstart - Elasticsearch 7.9.0 fails to start with a "permission denied" error

opened 12:15PM - 02 Sep 20 UTC

closed 10:14AM - 18 Feb 21 UTC

kurbar

>bug

## Bug Report **What did you do?** 1. Install ECK from the `all-in-one.yaml` m…anifest file. 2. Per the [Quickstart guide](https://www.elastic.co/guide/en/cloud-on-k8s/current/k8s-deploy-elasticsearch.html) install Elasticsearch **What did you expect to see?** A running Elasticsearch cluster **What did you see instead? Under which circumstances?** Elasticsearch fails to start with the following error: ``` chroot: failed to run command '/usr/share/elasticsearch/bin/elasticsearch': Permission denied ``` **Environment** * ECK version: 1.2.1 * Kubernetes information: kubeadm cluster with Kubernetes v1.15.7. Storage backend: GlusterFS v5.11 with Heketi ``` $ kubectl version Client Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.3", GitCommit:"06ad960bfd03b39c8310aaf92d1e7c12ce618213", GitTreeState:"clean", BuildDate:"2020-02-13T18:06:54Z", GoVersion:"go1.13.8", Compiler:"gc", Platform:"darwin/amd64"} Server Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.7", GitCommit:"6c143d35bb11d74970e7bc0b6c45b6bfdffc0bd4", GitTreeState:"clean", BuildDate:"2019-12-11T12:34:17Z", GoVersion:"go1.12.12", Compiler:"gc", Platform:"linux/amd64"} ``` * Resource definition: Elasticsearch manifest ``` apiVersion: elasticsearch.k8s.elastic.co/v1 kind: Elasticsearch metadata: name: monitoring namespace: <redacted> spec: version: 7.9.0 nodeSets: - name: default count: 1 # podTemplate: <-- Tried setting this as well, result is the same error # spec: # securityContext: # runAsUser: 1000 # runAsGroup: 1000 # fsGroup: 1000 volumeClaimTemplates: - metadata: name: elasticsearch-data spec: accessModes: - ReadWriteOnce resources: requests: storage: 2Gi storageClassName: standard config: node.master: true node.data: true node.ingest: true node.store.allow_mmap: false ```

WookWook · November 21, 2022, 2:53pm

Hello Julia,

with this setting the pod ist not even trying to start or showing up. Openshift restrictions are quiet special...

I just found another message in Openshift for this pod

"fleet-server
Reconciliation error: no matching agent policy found"

And there is really no agent policy in Kibana when I check. Shouldnt they get created on startup of Kibana? I mean they are configured in the .yaml

    xpack.fleet.agentPolicies:

Julia_Bardi · November 21, 2022, 3:26pm

Yes, the Fleet Server agent policy should be created on Kibana startup.
Do you see any errors in Kibana logs?

WookWook · November 23, 2022, 9:22am

Only this warning, nothing else

[2022-11-18T09:27:21.851+00:00][WARN ][config.deprecation] Config key [xpack.fleet.agentPolicies.is_default] is deprecated.
[2022-11-18T09:27:21.851+00:00][WARN ][config.deprecation] Config key [xpack.fleet.agentPolicies.is_default_fleet_server] is deprecated.

Julia_Bardi · November 23, 2022, 9:59am

Can you share the logs around "no matching agent policy found" error?

WookWook · November 23, 2022, 10:31am

This one is acutually from the Openshift deployment. Nothing more

Julia_Bardi · November 23, 2022, 11:39am

When you check in Kibana UI or API, do you see the agent policies created?

You can try adding a new policy and use it for enrollment: Configuration | Elastic Cloud on Kubernetes [2.5] | Elastic

WookWook · November 23, 2022, 8:30pm

Added a new policy manually. Did not help yet.

But I found this!

Seems like there is a process still going on for many days now. Maybe this one is blocking something?

Julia_Bardi · November 24, 2022, 7:31am

I don't think that blocks anything, it just means there was an unenroll action that was not acknowledged by 1 agent, maybe because it was offline.

Are you getting the same error when you try to enroll fleet server with the new custom policy? Can you paste here the command output?

WookWook · November 24, 2022, 8:20am

Hello Julia,

So I created a agent policy with the Kibana UI which looks like this.

In the fleet-server agent config I added this

Now I get messages in Kibana concerning a missing Agent policy

I also found this in the eventlog from Openshift

And after removing and recreating the agent instances I get this messages in Kibana

[2022-11-24T07:56:41.255+00:00][INFO ][plugins.security.authentication] Authentication attempt failed: {"error":{"root_cause":[{"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}}],"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}},"status":401}
[2022-11-24T07:56:41.356+00:00][INFO ][plugins.security.authentication] Authentication attempt failed: {"error":{"root_cause":[{"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}}],"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}},"status":401}
[2022-11-24T07:56:41.450+00:00][INFO ][plugins.security.authentication] Authentication attempt failed: {"error":{"root_cause":[{"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}}],"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}},"status":401}
[2022-11-24T07:56:41.552+00:00][INFO ][plugins.security.authentication] Authentication attempt failed: {"error":{"root_cause":[{"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}}],"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}},"status":401}
[2022-11-24T07:56:41.657+00:00][INFO ][plugins.security.authentication] Authentication attempt failed: {"error":{"root_cause":[{"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}}],"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}},"status":401}
[2022-11-24T07:56:41.767+00:00][INFO ][plugins.security.authentication] Authentication attempt failed: {"error":{"root_cause":[{"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}}],"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}},"status":401}
[2022-11-24T07:56:41.870+00:00][INFO ][plugins.security.authentication] Authentication attempt failed: {"error":{"root_cause":[{"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}}],"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}},"status":401}
[2022-11-24T07:56:42.036+00:00][INFO ][plugins.security.authentication] Authentication attempt failed: {"error":{"root_cause":[{"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}}],"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}},"status":401}
[2022-11-24T07:56:42.783+00:00][INFO ][plugins.security.authentication] Authentication attempt failed: {"error":{"root_cause":[{"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}}],"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}},"status":401}
[2022-11-24T07:56:44.169+00:00][INFO ][plugins.security.authentication] Authentication attempt failed: {"error":{"root_cause":[{"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}}],"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}},"status":401}
[2022-11-24T07:56:46.832+00:00][INFO ][plugins.security.authentication] Authentication attempt failed: {"error":{"root_cause":[{"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}}],"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}},"status":401}
[2022-11-24T07:56:52.055+00:00][INFO ][plugins.security.authentication] Authentication attempt failed: {"error":{"root_cause":[{"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}}],"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}},"status":401}
[2022-11-24T07:57:02.400+00:00][INFO ][plugins.security.authentication] Authentication attempt failed: {"error":{"root_cause":[{"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}}],"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}},"status":401}
[2022-11-24T07:57:22.980+00:00][INFO ][plugins.security.authentication] Authentication attempt failed: {"error":{"root_cause":[{"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}}],"type":"security_exception","reason":"unable to authenticate user [elastic-fleet-server-agent-kb-user] for REST request [/_security/_authenticate]","header":{"WWW-Authenticate":["Basic realm=\"security\" charset=\"UTF-8\"","Bearer realm=\"security\"","ApiKey"]}},"status":401}

The mentioned user secret gets recreated after a redeploy of the agent instances

Julia_Bardi · November 24, 2022, 8:23am

eck-fleet-server is the policy name, not the ID. You can check the ID in the agent details page url, something like /app/fleet/policies/<id>. Can you try adding this ID to the config?

WookWook · November 24, 2022, 8:33am

Yeah I just found the "View Policy" button and saw the ID is something different. Thank you!

Now the pod is getting created again but I am back to my initial error.

system · December 22, 2022, 8:33am

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Elastic Fleet Server Agent fails on startup

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