kubernetesのyaml設定の特定パラメータを確認する。
21225 ワード
はじめ
テストするのに便利そうだったから、メモ書き程度のに残します。
テスト
pod情報から以下の情報を得た時の情報から特定の設定情報だけを取り出す方法
$ kubectl get -n gf-space pod
NAME READY STATUS RESTARTS AGE
cadvisor-4jngn 1/1 Running 0 16d
cadvisor-5wpgj 1/1 Running 1 16d
cadvisor-lzqt6 1/1 Running 2 16d
dockeri2cmoni-i2c-r5vnq 1/1 Running 0 16d
dockeri2cmoni-lbs6j 1/1 Running 1 16d
dockeri2cmoni-z54rr 1/1 Running 2 16d
exporter-4gn86 1/1 Running 5 36d
exporter-rtzhk 1/1 Running 12 54d
exporter-tfzj8 1/1 Running 8 54d
grafana-6f9df59584-mcfp7 1/1 Running 0 22d
loki-654fbc4c68-2pbb7 1/1 Running 0 12d
prometheus-cc69fd6b9-zm5p4 1/1 Running 112 22d
promtail-cg87t 1/1 Running 0 12d
promtail-fs67n 1/1 Running 0 12d
promtail-mqnkc 1/1 Running 0 12d
実行結果、grafanaの情報をdescribeで調べます。
$ kubectl describe -n gf-space pod/grafana-6f9df59584-mcfp7
Name: grafana-6f9df59584-mcfp7
Namespace: gf-space
Priority: 0
Node: raspberrypi5/192.168.0.25
Start Time: Tue, 13 Oct 2020 15:24:46 +0900
Labels: app=grafana
pod-template-hash=6f9df59584
Annotations: <none>
Status: Running
IP: 10.244.2.141
IPs:
IP: 10.244.2.141
Controlled By: ReplicaSet/grafana-6f9df59584
Containers:
grafana:
Container ID: docker://662136dbe45bf671a46f2de4d36c2779c049ca2969461697fde8eb12cebf076c
Image: grafana/grafana
Image ID: docker-pullable://grafana/grafana@sha256:a24849c210ebea3ec754594302faa49d5a21460cdc14ab30dd38d8938a865f09
Port: 3000/TCP
Host Port: 0/TCP
State: Running
Started: Tue, 13 Oct 2020 15:24:49 +0900
Ready: True
Restart Count: 0
Environment:
TZ: Asia/Tokyo
Mounts:
/var/lib/grafana from grafana-vol (rw)
/var/run/secrets/kubernetes.io/serviceaccount from default-token-lb8hf (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
grafana-vol:
Type: PersistentVolumeClaim (a reference to a PersistentVolumeClaim in the same namespace)
ClaimName: grafana-pv-claim
ReadOnly: false
default-token-lb8hf:
Type: Secret (a volume populated by a Secret)
SecretName: default-token-lb8hf
Optional: false
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events: <none>
Image情報だけ取り出したいときで、スクロールして調べるのがめんどくさいので、
以下のコマンドでjson情報が取り出せる
$ kubectl get -n gf-space pod/grafana-6f9df59584-mcfp7 -o jsonpath={}
{"apiVersion":"v1","kind":"Pod","metadata":{"creationTimestamp":"2020-10-13T06:24:46Z","generateName":"grafana-6f9df59584-","labels":{"app":"grafana","pod-template-hash":"6f9df59584"},"managedFields":[{"apiVersion":"v1","fieldsType":"FieldsV1","fieldsV1":{"f:metadata":{"f:generateName":{},"f:labels":{".":{},"f:app":{},"f:pod-template-hash":{}},"f:ownerReferences":{".":{},"k:{\"uid\":\"3d95d8ce-2ffd-4c70-b844-cb9be15a49d0\"}":{".":{},"f:apiVersion":{},"f:blockOwnerDeletion":{},"f:controller":{},"f:kind":{},"f:name":{},"f:uid":{}}}},"f:spec":{"f:containers":{"k:{\"name\":\"grafana\"}":{".":{},"f:env":{".":{},"k:{\"name\":\"TZ\"}":{".":{},"f:name":{},"f:value":{}}},"f:image":{},"f:imagePullPolicy":{},"f:name":{},"f:ports":{".":{},"k:{\"containerPort\":3000,\"protocol\":\"TCP\"}":{".":{},"f:containerPort":{},"f:protocol":{}}},"f:resources":{},"f:terminationMessagePath":{},"f:terminationMessagePolicy":{},"f:volumeMounts":{".":{},"k:{\"mountPath\":\"/var/lib/grafana\"}":{".":{},"f:mountPath":{},"f:name":{}}}}},"f:dnsPolicy":{},"f:enableServiceLinks":{},"f:restartPolicy":{},"f:schedulerName":{},"f:securityContext":{},"f:terminationGracePeriodSeconds":{},"f:volumes":{".":{},"k:{\"name\":\"grafana-vol\"}":{".":{},"f:name":{},"f:persistentVolumeClaim":{".":{},"f:claimName":{}}}}}},"manager":"kube-controller-manager","operation":"Update","time":"2020-10-26T23:43:09Z"},{"apiVersion":"v1","fieldsType":"FieldsV1","fieldsV1":{"f:status":{"f:conditions":{"k:{\"type\":\"ContainersReady\"}":{".":{},"f:lastProbeTime":{},"f:lastTransitionTime":{},"f:status":{},"f:type":{}},"k:{\"type\":\"Initialized\"}":{".":{},"f:lastProbeTime":{},"f:lastTransitionTime":{},"f:status":{},"f:type":{}},"k:{\"type\":\"Ready\"}":{".":{},"f:lastProbeTime":{},"f:lastTransitionTime":{},"f:status":{},"f:type":{}}},"f:containerStatuses":{},"f:hostIP":{},"f:phase":{},"f:podIP":{},"f:podIPs":{".":{},"k:{\"ip\":\"10.244.2.141\"}":{".":{},"f:ip":{}}},"f:startTime":{}}},"manager":"kubelet","operation":"Update","time":"2020-10-26T23:43:38Z"}],"name":"grafana-6f9df59584-mcfp7","namespace":"gf-space","ownerReferences":[{"apiVersion":"apps/v1","blockOwnerDeletion":true,"controller":true,"kind":"ReplicaSet","name":"grafana-6f9df59584","uid":"3d95d8ce-2ffd-4c70-b844-cb9be15a49d0"}],"resourceVersion":"10135232","selfLink":"/api/v1/namespaces/gf-space/pods/grafana-6f9df59584-mcfp7","uid":"2988d8f3-ada0-4ea0-bf32-22f0f54149bf"},"spec":{"containers":[{"env":[{"name":"TZ","value":"Asia/Tokyo"}],"image":"grafana/grafana","imagePullPolicy":"IfNotPresent","name":"grafana","ports":[{"containerPort":3000,"protocol":"TCP"}],"resources":{},"terminationMessagePath":"/dev/termination-log","terminationMessagePolicy":"File","volumeMounts":[{"mountPath":"/var/lib/grafana","name":"grafana-vol"},{"mountPath":"/var/run/secrets/kubernetes.io/serviceaccount","name":"default-token-lb8hf","readOnly":true}]}],"dnsPolicy":"ClusterFirst","enableServiceLinks":true,"nodeName":"raspberrypi5","preemptionPolicy":"PreemptLowerPriority","priority":0,"restartPolicy":"Always","schedulerName":"default-scheduler","securityContext":{},"serviceAccount":"default","serviceAccountName":"default","terminationGracePeriodSeconds":30,"tolerations":[{"effect":"NoExecute","key":"node.kubernetes.io/not-ready","operator":"Exists","tolerationSeconds":300},{"effect":"NoExecute","key":"node.kubernetes.io/unreachable","operator":"Exists","tolerationSeconds":300}],"volumes":[{"name":"grafana-vol","persistentVolumeClaim":{"claimName":"grafana-pv-claim"}},{"name":"default-token-lb8hf","secret":{"defaultMode":420,"secretName":"default-token-lb8hf"}}]},"status":{"conditions":[{"lastProbeTime":null,"lastTransitionTime":"2020-10-13T06:24:46Z","status":"True","type":"Initialized"},{"lastProbeTime":null,"lastTransitionTime":"2020-10-13T06:24:50Z","status":"True","type":"Ready"},{"lastProbeTime":null,"lastTransitionTime":"2020-10-13T06:24:50Z","status":"True","type":"ContainersReady"},{"lastProbeTime":null,"lastTransitionTime":"2020-10-13T06:24:46Z","status":"True","type":"PodScheduled"}],"containerStatuses":[{"containerID":"docker://662136dbe45bf671a46f2de4d36c2779c049ca2969461697fde8eb12cebf076c","image":"grafana/grafana:latest","imageID":"docker-pullable://grafana/grafana@sha256:a24849c210ebea3ec754594302faa49d5a21460cdc14ab30dd38d8938a865f09","lastState":{},"name":"grafana","ready":true,"restartCount":0,"started":true,"state":{"running":{"startedAt":"2020-10-13T06:24:49Z"}}}],"hostIP":"192.168.0.25","phase":"Running","podIP":"10.244.2.141","podIPs":[{"ip":"10.244.2.141"}],"qosClass":"BestEffort","startTime":"2020-10-13T06:24:46Z"}}
欲しいのは、spec内のcontainers配列1番目のimageの情報のため以下のコマンドで取り出せる。
$ kubectl get -n gf-space pod/grafana-6f9df59584-mcfp7 -o jsonpath={.spec.containers[0].image}
grafana/grafana
Author And Source
この問題について(kubernetesのyaml設定の特定パラメータを確認する。), 我々は、より多くの情報をここで見つけました https://qiita.com/karosuwindam/items/da2743654af60d89da50著者帰属：元の著者の情報は、元のURLに含まれています。著作権は原作者に属する。
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