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Merge pull request #9 from rhcarvalho/simplify-run-in-container

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Simplify run-in-container script
This commit is contained in:
Ben Parees 2015-06-10 11:57:17 -04:00
commit dbc2e6b57b
2 changed files with 10 additions and 18 deletions
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20
README.md
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@ -156,28 +156,22 @@ that make this script obsolete.
Here is how you would run a command in a pod specified by label:
1. Inpect the output of the command below to find the name of a pod that matches a given label:
1. Inspect the output of the command below to find the name of a pod that matches a given label:
oc get pods -l <your-label-selector>
2. Open a shell in the pod of your choice:
2. Open a shell in the pod of your choice. Because of how the images produced
with CentOS and RHEL work currently, we need to wrap commands with `bash` to
enable any Software Collections that may be used (done automatically inside
every bash shell).
oc exec -p <pod-name> -it -- bash
3. Because of how `kubectl exec` and `oc exec` work right now, 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, 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.
3. 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
2. https://github.com/openshift/origin/issues/2001
The wrapper script combines the steps above into one. You can use it like this:

8
openshift/scripts/run-in-container.sh
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@ -9,9 +9,8 @@
# that make this script obsolete.
# 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
# - https://github.com/GoogleCloudPlatform/kubernetes/issues/8876
# - https://github.com/openshift/origin/issues/2001
# Usage examples:
@ -39,5 +38,4 @@ POD_INSTANCE_NAME=`oc get pods \
-t "{{ with index .items ${POD_INDEX:-0} }}{{ .metadata.name }}{{ end }}"`
# Run command in a container of the specified pod:
oc exec -p "$POD_INSTANCE_NAME" -it -- bash -c \
"cd \$HOME && source scl_source enable python33 && ${@:-echo}"
oc exec -p "$POD_INSTANCE_NAME" -it -- bash -c "${@:-echo}"