K8s Logging

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Node-level Logging

  • System component logs
RUN IN CONTAINER(Y/N) Systemd(W/WO) LOGGER LOCATION
kubelet and container runtime W/O /var/log
kubelet and container runtime W journald
scheduler Y /var/log
kube-proxy Y /var/log

/var/lib/kubelet/pods/<PodUID>/

/var/log/pods/<PodUID>/<container_name>

ls -l /var/log/pods/<PodUID>/<container_name>/
lrwxrwxrwx 1 root root 165 3月  30 06:52 0.log -> /var/lib/docker/containers/e74eafc4b3f0cfe2e4e0462c93101244414eb3048732f409c29cc54527b4a021/e74eafc4b3f0cfe2e4e0462c93101244414eb3048732f409c29cc54527b4a021-json.log

Cluster-level logging

  • Use a node-level logging agent that runs on every node.
  • Include a dedicated sidecar container for logging in an application pod.
  • Push logs directly to a backend from within an application

具体实现

K8S

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