datadog研究 for kubernetes

1)公式に合わせて、以下を実行する。

kubectl create -f "https://raw.githubusercontent.com/DataDog/datadog-agent/master/Dockerfiles/manifests/rbac/clusterrole.yaml"

kubectl create -f "https://raw.githubusercontent.com/DataDog/datadog-agent/master/Dockerfiles/manifests/rbac/serviceaccount.yaml"

kubectl create -f "https://raw.githubusercontent.com/DataDog/datadog-agent/master/Dockerfiles/manifests/rbac/clusterrolebinding.yaml"

kubectl create secret generic datadog-secret --from-literal api-key="24f274ee18f81be45383e51774771f59"

2)以下を作成する。

◻️作成の中身も公式に合わせているので割愛。

①daemonset.yaml

②datadog-agent.yaml 

3)kubectl create実行後、podの詳細を見るとコケている。

root@rasp-master:~/datadog# kubectl describe pod datadog-agent-hnb2q

=====================================================================================

Name:           datadog-agent-hnb2q

Namespace:      default

Node:           rasp-node1/192.168.13.3

Start Time:     Wed, 01 May 2019 10:07:11 +0900

Labels:         app=datadog-agent

                controller-revision-hash=2831439401

                pod-template-generation=1

Annotations:    kubernetes.io/created-by={"kind":"SerializedReference","apiVersion":"v1","reference":{"kind":"DaemonSet","namespace":"default","name":"datadog-agent","uid":"73243b0b-6bad-11e9-b23a-b827eb4350be","apiV...

Status:         Running

IP:             10.244.1.86

Created By:     DaemonSet/datadog-agent

Controlled By:  DaemonSet/datadog-agent

Containers:

  datadog-agent:

    Container ID:   docker://38070588051b163c2f5bb54f8c158e009927ca20d6095b69b9bb7e93a532527a

    Image:          datadog/agent:latest

    Image ID:       docker-pullable://datadog/agent@sha256:5fbe2c87d4c4c2d9fc2d4bf45e39b0572f7f3f8ff906e3a77515a3308ab0c2cf

    Ports:          8125/UDP, 8126/TCP

    State:          Waiting

      Reason:       CrashLoopBackOff

    Last State:     Terminated

      Reason:       Error

      Exit Code:    1

      Started:      Wed, 01 May 2019 10:10:49 +0900

      Finished:     Wed, 01 May 2019 10:10:49 +0900

    Ready:          False

    Restart Count:  5

    Limits:

      cpu:     200m

      memory:  256Mi

    Requests:

      cpu:     200m

      memory:  256Mi

    Liveness:  exec [./probe.sh] delay=15s timeout=1s period=5s #success=1 #failure=3

    Environment:

      DD_API_KEY:                    <set to the key 'api-key' in secret 'datadog-secret'>  Optional: false

      DD_COLLECT_KUBERNETES_EVENTS:  true

      DD_LEADER_ELECTION:            true

      KUBERNETES:                    true

      DD_KUBERNETES_KUBELET_HOST:     (v1:status.hostIP)

      DD_APM_ENABLED:                true

    Mounts:

      /host/proc from procdir (ro)

      /host/sys/fs/cgroup from cgroups (ro)

      /var/run/docker.sock from dockersocket (rw)

      /var/run/secrets/kubernetes.io/serviceaccount from datadog-agent-token-v9vzr (ro)

Conditions:

  Type           Status

  Initialized    True 

  Ready          False 

  PodScheduled   True 

Volumes:

  dockersocket:

    Type:  HostPath (bare host directory volume)

    Path:  /var/run/docker.sock

  procdir:

    Type:  HostPath (bare host directory volume)

    Path:  /proc

  cgroups:

    Type:  HostPath (bare host directory volume)

    Path:  /sys/fs/cgroup

  datadog-agent-token-v9vzr:

    Type:        Secret (a volume populated by a Secret)

    SecretName:  datadog-agent-token-v9vzr

    Optional:    false

QoS Class:       Guaranteed

Node-Selectors:  <none>

Tolerations:     node.alpha.kubernetes.io/notReady:NoExecute

                 node.alpha.kubernetes.io/unreachable:NoExecute

                 node.kubernetes.io/disk-pressure:NoSchedule

                 node.kubernetes.io/memory-pressure:NoSchedule

Events:

  Type     Reason                 Age              From                 Message

  ----     ------                 ----             ----                 -------

  Normal   SuccessfulMountVolume  4m               kubelet, rasp-node1  MountVolume.SetUp succeeded for volume "procdir"

  Normal   SuccessfulMountVolume  4m               kubelet, rasp-node1  MountVolume.SetUp succeeded for volume "dockersocket"

  Normal   SuccessfulMountVolume  4m               kubelet, rasp-node1  MountVolume.SetUp succeeded for volume "cgroups"

  Normal   SuccessfulMountVolume  4m               kubelet, rasp-node1  MountVolume.SetUp succeeded for volume "datadog-agent-token-v9vzr"

  Normal   Pulling                3m (x3 over 3m)  kubelet, rasp-node1  pulling image "datadog/agent:latest"

  Normal   Pulled                 3m (x3 over 3m)  kubelet, rasp-node1  Successfully pulled image "datadog/agent:latest"

  Normal   Created                3m (x3 over 3m)  kubelet, rasp-node1  Created container

  Normal   Started                3m (x3 over 3m)  kubelet, rasp-node1  Started container

  Warning  FailedSync             3m (x4 over 3m)  kubelet, rasp-node1  Error syncing pod

  Warning  BackOff                3m (x5 over 3m)  kubelet, rasp-node1  Back-off restarting failed container

==================================================================================================

<結論>

上記のことから、継続し研究が必要だ。