Kubernetes Statefulsets
Делаю: 03.04.2019
По материалам из видео индуса.
https://www.youtube.com/watch?v=r_ZEpPTCcPE&list=PL34sAs7_26wNBRWM6BDhnonoA5FMERax0&index=22
Тоже самое, что и в NFS, только
$ sudo mkdir -p /srv/nfs/kubedata/{pv0,pv1,pv2,pv3,pv4}
$ sudo exportfs -rav
$ mkdir ~/tmp && cd ~/tmp/
$ curl -LJO https://bitbucket.org/sysadm-ru/kubernetes/raw/faf2f86a2c1bb82053c5aba9ea7c96463e4e61b0/yamls/9-sts-pv.yaml
$ vi 9-sts-pv.yaml
server: 192.168.0.6
$ kubectl create -f 9-sts-pv.yaml
$ kubectl get pv
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
pv-nfs-pv0 200Mi RWO Retain Available manual 39s
pv-nfs-pv1 200Mi RWO Retain Available manual 39s
pv-nfs-pv2 200Mi RWO Retain Available manual 39s
pv-nfs-pv3 200Mi RWO Retain Available manual 39s
pv-nfs-pv4 200Mi RWO Retain Available manual 39s
$ curl -LJO https://bitbucket.org/sysadm-ru/kubernetes/raw/faf2f86a2c1bb82053c5aba9ea7c96463e4e61b0/yamls/9-sts-nginx.yaml
$ vi 9-sts-nginx.yaml
replicas: 4
$ kubectl create -f 9-sts-nginx.yaml
$ kubectl get pv,pvc
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
persistentvolume/pv-nfs-pv0 200Mi RWO Retain Bound default/www-nginx-sts-0 manual 10m
persistentvolume/pv-nfs-pv1 200Mi RWO Retain Available manual 10m
persistentvolume/pv-nfs-pv2 200Mi RWO Retain Available manual 10m
persistentvolume/pv-nfs-pv3 200Mi RWO Retain Available manual 10m
persistentvolume/pv-nfs-pv4 200Mi RWO Retain Available manual 10m
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
persistentvolumeclaim/www-nginx-sts-0 Bound pv-nfs-pv0 200Mi RWO manual 49s
$ kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-sts-0 1/1 Running 0 13m
nginx-sts-1 1/1 Running 0 51s
nginx-sts-2 1/1 Running 0 33s
nginx-sts-3 1/1 Running 0 27s
$ kubectl exec -it nginx-sts-2 -- /bin/sh
$ cd /var/www
$ touch hello
$ ctrl^D
$ kubectl delete pod nginx-sts-2
$ kubectl exec -it nginx-sts-2 -- /bin/sh
$ ls /var/www
$ kubectl scale sts nginx-sts --replicas=0
$ kubectl delete sts nginx-sts
$ kubectl delete svc nginx-headless
$ kubectl delete pvc --all
$ kubectl delete pv --all
$ vi 9-sts-nginx.yaml
// разкомментировать
#podManagementPolicy: Parallel
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