Kubernetes Caliopen survival guide

Restart a service

kubectl -n production get pod
# find pods running the service
kubectl -n production delete pod <pod_name>

View logs

kubectl -n production logs --tail 200 -f deployment/<service>

Enter into a container

currently go container does not have any shell, it's not possible. For others

kubectl exec -it <pod_name> /bin/sh

Restart a node

Steps : ~~~~~~~

Commands ~~~~~~~~

1 - drain

$ kubectl drain <node> --ignore-daemonsets
$ kubectl get node
NAME      STATUS                     ROLES     AGE       VERSION
master    Ready                      master    190d      v1.13.2
node0     Ready                      <none>    190d      v1.13.2
node1     Ready,SchedulingDisabled   <none>    190d      v1.13.2
node2     Ready                      <none>    190d      v1.13.2
node3     Ready                      <none>    190d      v1.13.2

2 - reboot 

$ gandi vm reboot <node>

3 - restart service

# ssh root@<node>
$ service systemd-resolved start

# disable swap
swapoff -a
# start kubelet service
$ service kubelet restart

4 - reschedule

kubectl uncordon <node>
$ kubectl get node
NAME      STATUS    ROLES     AGE       VERSION
master    Ready     master    190d      v1.13.2
node0     Ready     <none>    190d      v1.13.2
node1     Ready     <none>    190d      v1.13.2
node2     Ready     <none>    190d      v1.13.2
node3     Ready     <none>    190d      v1.13.2