66 lines
2.2 KiB
Bash
Executable file
66 lines
2.2 KiB
Bash
Executable file
#!/bin/bash
|
|
|
|
# Use this script to run one-off commands inside a container of a pod where your
|
|
# Python application code lives in.
|
|
|
|
# You can accomplish the same results by using regular commands from OpenShift.
|
|
# This script is just wrapping calls to `osc` to make it a little more
|
|
# convenient to use. In the future, the `osc` cli tool might incorporate changes
|
|
# that make this script obsolete.
|
|
|
|
# Here is how you would run a command in a pod specified by label [1]:
|
|
#
|
|
# 1. Inpect the output of the command below to find the name of a pod that
|
|
# matches a given label:
|
|
#
|
|
# osc get pods -l <your-label-selector>
|
|
#
|
|
# 2. Open a bash shell in the pod of your choice:
|
|
#
|
|
# osc exec -p <pod-name> -it -- bash
|
|
#
|
|
# 3. Because of how `kubectl exec` and `osc exec` work right now [2], your
|
|
# current working directory is root (/). Change it to where your code lives:
|
|
#
|
|
# cd $HOME
|
|
#
|
|
# 4. Because of how the images produced with CentOS and RHEL work currently [3],
|
|
# you need to manually enable any Software Collections you need to use:
|
|
#
|
|
# source scl_source enable python33
|
|
#
|
|
# 5. Finally, execute any command that you need and exit the shell.
|
|
#
|
|
# Related GitHub issues:
|
|
# [1] https://github.com/GoogleCloudPlatform/kubernetes/issues/8876
|
|
# [2] https://github.com/GoogleCloudPlatform/kubernetes/issues/7770
|
|
# [3] https://github.com/openshift/origin/issues/2001
|
|
|
|
|
|
# You can use this wrapper like this:
|
|
#
|
|
# ./run-in-container.sh ./manage.py migrate
|
|
# ./run-in-container.sh ./manage.py createsuperuser
|
|
# ./run-in-container.sh tail -f access.log
|
|
#
|
|
# If your Python pods are labeled with a name other than "web", you can use:
|
|
#
|
|
# POD_NAME=something ./run-in-container.sh ./manage.py check
|
|
#
|
|
# You can also specify a POD by index:
|
|
#
|
|
# POD_INDEX=1 ./run-in-container.sh tail -f access.log
|
|
#
|
|
# Or both together:
|
|
#
|
|
# POD_NAME=frontend POD_INDEX=2 ./run-in-container.sh tail -f access.log
|
|
|
|
|
|
# Get name of a currently deployed pod by label and index
|
|
POD_INSTANCE_NAME=`osc get pods \
|
|
-l "name=${POD_NAME:-web}" \
|
|
-t "{{ with index .items ${POD_INDEX:-0} }}{{ .metadata.name }}{{ end }}"`
|
|
|
|
# Run command in a container of the specified pod:
|
|
osc exec -p "$POD_INSTANCE_NAME" -it -- bash -c \
|
|
"cd \$HOME && source scl_source enable python33 && ${@:-echo}"
|