dbcm with kubenetes

1. create consul

 

# kcompose convert -f /root/gitSwarm/dbcm-base-managers/compose/consul.yml

 

genetate two files:

 

consul-deployment.yaml  consul-service.yaml

 

# kubectl create -f consul-deployment.yaml -f consul-service.yaml

 

get consul cluster virtual ip:

# kubectl get svc consul

NAME      TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)                                        AGE

consul    ClusterIP   10.0.54.163   <none>        8500/TCP,8300/TCP,8301/TCP,8302/TCP,8400/TCP   16h

2. create mysql

 

After put metadata to consul(no change):

 

# kcompose convert -f /root/gitSwarm/dbcm-base-managers/compose/mysql.yml

 

genetate two files:

 

mysql-deployment.yaml  mysql-service.yaml

 

modify mysql-deployment.yaml:

------------

spec.replicas = (instance number)

image = (mysql latest image)

env:

    CLUSTER_ID

    CONSUL = (consul cluster virtual ip)

-------------

# kubectl create -f mysql-deployment.yaml -f mysql-service.yaml

 

# kubectl get po -l io.kompose.service=mysql

NAME                     READY     STATUS    RESTARTS   AGE

mysql-5b5d895b79-gxrbl   1/1       Running   0          2h

mysql-5b5d895b79-s9j5k   1/1       Running   0          2h

 

note:

consul service name no change

service id changes to mysql-all-{pod name}  mysql-primary-{pod name}

just like "mysql-all-mysql-5b5d895b79-gxrbl"  "mysql-primary-mysql-5b5d895b79-gxrb2"

 

3. scale cluster

 

# kubectl scale -f mysql-deployment.yaml --replicas=3

 

auto scale:

 

# kubectl autoscale -f mysql-deployment.yaml --min=2 --max=5 --cpu-percent=70

 

4. delete cluster

 

# kubectl delete -f mysql-deployment.yaml

 

5. get node log

 

# kubectl logs mysql-5b5d895b79-gxrbl(pod name)

 

6. RollingUpdate

 

# kubectl set image deployment/mysql mysql=registry.bst-1.cns.bstjpc.com:5000/dbelt/mysql-ms-mysql-v5.6.36-v0.5.0:20180206_update

 

check update status

 

# kubectl rollout status deployment/mysql

 

rollback

 

# kubectl rollout undo deployment/mysql

 

7. multiAZ

 

# kubectl label nodes mhc zone=beijing

 

modify mysql-deployment.yaml:

add:

     spec.nodeSelector.zone=north

 

8. run command

 

kubectl exec [flag] pod_name shell_command

 

# kubectl exec -ti mysql-55d5cbc5c4-fjgfj bash

9. resize

 

resize:

kubectl set resources deployment nginx-deployment -c=nginx --limits=cpu=200m,memory=512Mi

lack：

1. stop/restart cluster

2. get cluster log

 

other:

1. make deployment name unique

 

[root@mhc k8s]# kubectl label pod consul-5f557878f4-974hw role=master
pod "consul-5f557878f4-974hw" labeled
[root@mhc k8s]#
[root@mhc k8s]# kubectl label pod consul-5f557878f4-hg6sh role=slave
pod "consul-5f557878f4-hg6sh" labeled
[root@mhc k8s]# kubectl get po -l role=master
NAME                      READY     STATUS    RESTARTS   AGE
consul-5f557878f4-974hw   1/1       Running   0          17h

 

1. https://github.com/kubernetes/kompose

2. https://github.com/kubernetes/kubernetes