获取k8s中yaml里面的信息

查看k8s的deploy

[root@k8s-master ~]# kubectl -n kube-system get deploy 
NAME             READY   UP-TO-DATE   AVAILABLE   AGE
coredns          0/2     2            0           2y46d
kuboard          1/1     1            1           55d
metrics-server   1/1     1            1           55d

[root@k8s-master ~]# kubectl -n kube-system get deploy coredns -o yaml 
apiVersion: apps/v1
kind: Deployment
metadata:
  annotations:
    deployment.kubernetes.io/revision: "3"
  creationTimestamp: "2019-04-24T05:49:10Z"
  generation: 3
  labels:
    k8s-app: kube-dns
  managedFields:
  - apiVersion: apps/v1
    fieldsType: FieldsV1
    fieldsV1:
      f:metadata:

获取这个deploy的创建时间

# 以下命令都可以 
# 结果为(UTC 时间)： 2019-04-24T05:49:10Z
kubectl -n kube-system get deploy coredns --output="jsonpath={.metadata.creationTimestamp}"
kubectl -n kube-system get deploy coredns -o jsonpath={.metadata.creationTimestamp}
kubectl -n kube-system get deploy coredns -o go-template='{{.metadata.creationTimestamp}}'

按pod创建时间排序获取列表

kubectl -n kube-system get pods --sort-by=.metadata.creationTimestamp
NAME                                 READY   STATUS             RESTARTS   AGE
kube-apiserver-k8s-master            1/1     Running            11         2y46d
kube-proxy-ld577                     1/1     Running            5          2y46d
kube-proxy-k9zxm                     1/1     Running            2          2y46d
kube-proxy-zfrgc                     1/1     Running            2          2y46d
kube-flannel-ds-amd64-tlhlp          1/1     Running            6          2y46d
kube-flannel-ds-amd64-j27t8          1/1     Running            2          2y46d
kube-flannel-ds-amd64-q5p5n          1/1     Running            2          2y46d
kube-controller-manager-k8s-master   1/1     Running            4          2y46d
kube-scheduler-k8s-master            1/1     Running            5          2y46d
etcd-k8s-master                      1/1     Running            9          198d
coredns-78499c79bb-8qbkt             0/1     CrashLoopBackOff   26         55d
coredns-78499c79bb-pnsw2             0/1     CrashLoopBackOff   26         55d
kuboard-7986796cf8-zctql             1/1     Running            0          55d
metrics-server-677dcb8b4d-gwd4p      1/1     Running            0          55d

将pod的创建时间转换为时间戳

creationTimestamp=`kubectl -n kube-system get deploy coredns -o go-template='{{.metadata.creationTimestamp}}'`
date -d "$creationTimestamp" +%s

参考：shell 时间转换 shell 命令行处理时间(date)

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