Kubernetes Statefulsets

Делаю: 03.04.2019

По материалам из видео индуса.

https://www.youtube.com/watch?v=r_ZEpPTCcPE&list=PL34sAs7_26wNBRWM6BDhnonoA5FMERax0&index=22

kubernetes Statefulsets

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

Повторить