jumpbox

Provides a "jumpbox" image for Openshift containing:

• bash
• curl
• source code control: git
• dns utilities: nslookup and dig
• text editors: nano and vi
• scripting: python
• aws cli
• mysql
• Openshift cli
• NSS Wrapper (to handle Openshift's dynamic UIDs)

The jumpbox is a docker container which runs a simple, one line bash shell script to loop indefinitely on a sleep statement.

Deploying a jumpbox on Openshift

apiVersion: v1
kind: Pod
metadata:
  name: jumpbox
spec:
  containers:
    - name: jumpbox
      image: mchudgins/jumpbox:latest
      command: [ "/bin/sh", "-c", "while /bin/true; do sleep 60; done" ]
      env:
        - name: POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: "metadata.namespace"
      imagePullPolicy: Always
  restartPolicy: Never

Connecting to the the jumpbox

After logging in via the Openshift cli, you can run oc exec to connect to the jumpbox pod. However, for some reason I haven't taken the time to fully grok, the PS1 prompt complains "I have no name". To correct this launch a second Bash child process. Since oc doesn't currently set up the Linux terminal to match the command line terminal on your computer, create the following bash shell script to provide for a more optimal user experience:

#!/bin/sh
if [ "$1" = "" ]; then
  echo "Usage: kshell <pod>"
  exit 1
fi
COLUMNS=`tput cols`
LINES=`tput lines`
TERM=xterm
oc exec -i -t $1 -- env COLUMNS=$COLUMNS LINES=$LINES TERM=$TERM bash -il -c "bash"

Call this new shell script kshell and connect to your jumpbox pod using kshell <pod name>.

Happy hunting.