はじめに
kubectl statusを使って、Kubernetesリソースの状態を取得する方法を紹介します。
kubectl-status
kubectl statusは、Kubernetesのリソースの状態をわかりやすく表示してくれるkubectlプラグインです。
GitHub - bergerx/kubectl-status: A kubectl plugin to print a human-friendly output that focuses on the status fields of the resources in kubernetes.
A kubectl plugin to print a human-friendly output that focuses on the status fields of the resources in kubernetes. - GitHub - bergerx/kubectl-status: A kubectl...
github.com
全てのリソースが対応しているわけではないですが、PodやDeployment、Serviceなどよく使いそうなものは対応しています。
下記のtemplateが対応しているリソースだと思います。
kubectl-status/pkg/plugin/templates at master · bergerx/kubectl-status
A kubectl plugin to print a human-friendly output that focuses on the status fields of the resources in kubernetes. - kubectl-status/pkg/plugin/templates at mas...
github.com
インストール
krewを使って、下記のコマンドからインストールできます。
kubectl krew install statuskrewについては、下記を参照してください。
【Kubernetes】Krewでkubectlのプラグインを管理する
はじめにkubectlのプラグインを管理できるKrewについて紹介していきます。KrewとはKrewは、kubectlコマンドのプラグインマネージャーになります。kubectlのプラグインの検索やインストール、アップデートが楽にできるように...
amateur-engineer-blog.com
2022.11.27
使い方
基本的には下記のようにkubectl getと同じように使うことができます。
kubectl status {resource}例えばDeploymentの場合は下記になります。
kubectl status deployロールアウトの履歴やイベントのログなどが確認できます。
❯ kubectl status deploy
Deployment/busybox -n default, created 30m ago, gen:4 rev:4
Current: Deployment is available. Replicas: 1
Managed by busybox application
desired:1, existing:1, ready:1, updated:1, available:1
Available MinimumReplicasAvailable, Deployment has minimum availability. for 14m
Progressing NewReplicaSetAvailable, ReplicaSet "busybox-59c5767947" has successfully progressed. for 30m, last update was 8m ago
Rollouts: Use the `--include-rollout-diffs` flag to see the diff between each rollout!
30m ago, managed by ReplicaSet/busybox-56b5d787f4
9m ago, managed by ReplicaSet/busybox-6b4d4bb454
8m ago, managed by ReplicaSet/busybox-54cd57c4b6
8m ago, managed by ReplicaSet/busybox-59c5767947, has 1 replicas
Known/recorded manage events:
8m ago Updated by kubectl-client-side-apply (metadata, spec)
8m ago Updated by kube-controller-manager (metadata, status)
Events:
ScalingReplicaSet 30m ago from deployment-controller: Scaled up replica set busybox-56b5d787f4 to 1
ScalingReplicaSet 9m ago from deployment-controller: Scaled up replica set busybox-6b4d4bb454 to 1
ScalingReplicaSet 9m ago from deployment-controller: Scaled down replica set busybox-56b5d787f4 to 0 from 1
ScalingReplicaSet 8m ago from deployment-controller: Scaled up replica set busybox-54cd57c4b6 to 1
ScalingReplicaSet 8m ago from deployment-controller: Scaled down replica set busybox-6b4d4bb454 to 0 from 1
ScalingReplicaSet 8m ago from deployment-controller: Scaled up replica set busybox-59c5767947 to 1
ScalingReplicaSet 8m ago from deployment-controller: Scaled down replica set busybox-54cd57c4b6 to 0 from 1Podの場合は、下記のようになります。
kubectl status podPodに含まれるコンテナの状態やイベントのログなどが確認できます。
❯ kubectl status pod
Pod/busybox-59c5767947-qcp95 -n default, created 8m ago by ReplicaSet/busybox-59c5767947 Running BestEffort
Current: Pod is Ready
Managed by busybox application
PodScheduled -> Initialized -> ContainersReady -> Ready for 7m
Containers:
bb1 (busybox:1.34-glibc) Running for 8m and Ready
bb2 (busybox:1.35-musl) Running for 8m and Ready
bb3 (busybox:1.34-uclibc) Running for 7m and Ready
Known/recorded manage events:
8m ago Updated by kube-controller-manager (metadata, spec)
7m ago Updated by kubelet (status)
Events:
Scheduled 8m ago from default-scheduler: Successfully assigned default/busybox-59c5767947-qcp95 to docker-desktop
Pulled 8m ago from kubelet,docker-desktop: Container image "busybox:1.34-glibc" already present on machine
Created 8m ago from kubelet,docker-desktop: Created container bb1
Started 8m ago from kubelet,docker-desktop: Started container bb1
Pulled 8m ago from kubelet,docker-desktop: Container image "busybox:1.35-musl" already present on machine
Created 8m ago from kubelet,docker-desktop: Created container bb2
Started 8m ago from kubelet,docker-desktop: Started container bb2
Pulling 8m ago from kubelet,docker-desktop: Pulling image "busybox:1.34-uclibc"
Pulled 7m ago from kubelet,docker-desktop: Successfully pulled image "busybox:1.34-uclibc" in 4.718522272s
Created 7m ago from kubelet,docker-desktop: Created container bb3
Started 7m ago from kubelet,docker-desktop: Started container bb3Deploymentのrevision間のdiff
個人的に自分が便利だと思ったオプションを紹介します。
--include-rollout-diffsオプションを使うことで、Deploymentのロールアウトごとの差分を表示してくれます。
kubectl status deploy --include-rollout-diffs❯ kubectl status deploy --include-rollout-diffs
Deployment/busybox -n default, created 39m ago, gen:4 rev:4
Current: Deployment is available. Replicas: 1
Managed by busybox application
desired:1, existing:1, ready:1, updated:1, available:1
Progressing NewReplicaSetAvailable, ReplicaSet "busybox-59c5767947" has successfully progressed. for 39m, last update was 17m ago
Available MinimumReplicasAvailable, Deployment has minimum availability. for 30s
Rollouts:
39m ago, managed by ReplicaSet/busybox-56b5d787f4
18m ago, managed by ReplicaSet/busybox-6b4d4bb454
Diff:
--- a ReplicaSet/busybox-56b5d787f4 2022-12-17 06:08:09 +0000 UTC (39m ago)
+++ b ReplicaSet/busybox-6b4d4bb454 2022-12-17 06:29:30 +0000 UTC (18m ago)
@@ -41,7 +41,7 @@
"sleep",
"9999"
],
- "image": "busybox:1.34",
+ "image": "busybox:1.34-glibc",
"imagePullPolicy": "IfNotPresent",
"name": "bb1",
"resources": {},
17m ago, managed by ReplicaSet/busybox-54cd57c4b6
Diff:
--- a ReplicaSet/busybox-6b4d4bb454 2022-12-17 06:29:30 +0000 UTC (18m ago)
+++ b ReplicaSet/busybox-54cd57c4b6 2022-12-17 06:30:08 +0000 UTC (17m ago)
@@ -53,7 +53,7 @@
"sleep",
"99999"
],
- "image": "busybox:1.35",
+ "image": "busybox:1.35-musl",
"imagePullPolicy": "IfNotPresent",
"name": "bb2",
"resources": {},
17m ago, managed by ReplicaSet/busybox-59c5767947, has 1 replicas
Diff:
--- a ReplicaSet/busybox-54cd57c4b6 2022-12-17 06:30:08 +0000 UTC (17m ago)
+++ b ReplicaSet/busybox-59c5767947 2022-12-17 06:30:46 +0000 UTC (17m ago)
@@ -65,7 +65,7 @@
"sleep",
"999"
],
- "image": "busybox:1.34-glibc",
+ "image": "busybox:1.34-uclibc",
"imagePullPolicy": "IfNotPresent",
"name": "bb3",
"resources": {},
Known/recorded manage events:
17m ago Updated by kubectl-client-side-apply (metadata, spec)
31s ago Updated by kube-controller-manager (metadata, status)
Events:
ScalingReplicaSet 39m ago from deployment-controller: Scaled up replica set busybox-56b5d787f4 to 1
ScalingReplicaSet 18m ago from deployment-controller: Scaled up replica set busybox-6b4d4bb454 to 1
ScalingReplicaSet 18m ago from deployment-controller: Scaled down replica set busybox-56b5d787f4 to 0 from 1
ScalingReplicaSet 17m ago from deployment-controller: Scaled up replica set busybox-54cd57c4b6 to 1
ScalingReplicaSet 17m ago from deployment-controller: Scaled down replica set busybox-6b4d4bb454 to 0 from 1
ScalingReplicaSet 17m ago from deployment-controller: Scaled up replica set busybox-59c5767947 to 1
ScalingReplicaSet 17m ago from deployment-controller: Scaled down replica set busybox-54cd57c4b6 to 0 from 1
