看系统日志
cat /var/log/messages
tail /var/log/messages -f
用kubectl 查看日志
# 注意：使用Kubelet describe 查看日志，一定要带上 命名空间，否则会报如下错误
[root@node2 ~]# kubectl describe pod coredns-6c65fc5cbb-8ntpv
Error from server (NotFound): pods "coredns-6c65fc5cbb-8ntpv" not found
kubectl describe pod kubernetes-dashboard-849cd79b75-s2snt --namespace kube-system
kubectl logs -f pods/monitoring-influxdb-fc8f8d5cd-dbs7d -n kube-system
kubectl logs --tail 200 -f kube-apiserver -n kube-system |more
kubectl logs --tail 200 -f podname -n jenkins
用journalctl查看日志非常管用
journalctl -u kube-scheduler
journalctl -xefu kubelet
journalctl -u kube-apiserver
journalctl -u kubelet |tail
journalctl -xe
用docker查看日志
docker logs c36c56e4cfa3 (容器id)
