Executing a command in a container

Executing a command in a container

TL;DR

  • Execute a Command in a Container
  • Get a Shell in a Container

Executing Commands

Motivation

Debugging Workloads by running commands within the Container. Commands may be a Shell with a tty.

Exec Command

Run a command in a Container in the cluster by specifying the Pod name.

  1. kubectl exec nginx-78f5d695bd-czm8z ls
  1. bin  boot  dev    etc  home  lib    lib64  media  mnt  opt    proc  root  run  sbin  srv  sys  tmp  usr  var

Exec Shell

To get a Shell in a Container, use the -t -i options to get a tty and attach STDIN.

  1. kubectl exec -t -i nginx-78f5d695bd-czm8z bash
  1. root@nginx-78f5d695bd-czm8z:/# ls
  2. bin  boot  dev    etc  home  lib    lib64  media  mnt  opt    proc  root  run  sbin  srv  sys  tmp  usr  var

Specifying the Container

For Pods running multiple Containers, the Container should be specified with -c <container-name>.