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fixing a couple of commands, and adding an echo

reviewable/pr1201/r1
chrislovecnm 2016-09-10 14:31:35 -06:00
parent 7fff2005fe
commit 26cbacc3d6
1 changed files with 7 additions and 6 deletions
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13
docs/user-guide/kubectl-cheatsheet.md
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@ -85,7 +85,7 @@ $ kubectl describe pods <rc-name> # Lists pods created by <rc-name
$ kubectl get services --sort-by=.metadata.name $ kubectl get services --sort-by=.metadata.name
# List pods Sorted by Restart Count # List pods Sorted by Restart Count
$ kubectl get pods --sort-by=.status.containerStatuses[0].restartCount $ kubectl get pods --sort-by='.status.containerStatuses[0].restartCount'
# Get the version label of all pods with label app=cassandra # Get the version label of all pods with label app=cassandra
$ kubectl get pods --selector=app=cassandra rc -o 'jsonpath={.items[*].metadata.labels.version}' $ kubectl get pods --selector=app=cassandra rc -o 'jsonpath={.items[*].metadata.labels.version}'
@ -95,12 +95,13 @@ $ kubectl get nodes -o jsonpath='{.items[*].status.addresses[?(@.type=="External
# List Names of Pods that belong to Particular RC # List Names of Pods that belong to Particular RC
# "jq" command useful for transformations that are too complex for jsonpath # "jq" command useful for transformations that are too complex for jsonpath
$ sel=$(./kubectl get rc <rc-name> --output=json | jq -j '.spec.selector | to_entries | .[] | "\(.key)=\(.value),"') $ sel=$(kubectl get rc <rc-name> --output=json | jq -j '.spec.selector | to_entries | .[] | "\(.key)=\(.value),"')
$ sel=${sel%?} # Remove trailing comma $ sel=${sel%?} # Remove trailing comma
$ pods=$(kubectl get pods --selector=$sel --output=jsonpath={.items..metadata.name})` $ pods=$(kubectl get pods --selector=$sel --output=jsonpath={.items..metadata.name})
$ echo $pods
# Check which nodes are ready # Check which nodes are ready
$ kubectl get nodes -o jsonpath='{range .items[*]}{@.metadata.name}:{range @.status.conditions[*]}{@.type}={@.status};{end}{end}'| tr ';' "\n" | grep "Ready=True" $ kubectl get nodes -o jsonpath='{range .items[*]}{@.metadata.name}:{range @.status.conditions[*]}{@.type}={@.status};{end}{end}'| tr ';' "\n" | grep "Ready=True"
``` ```
## Modifying and Deleting Resources ## Modifying and Deleting Resources
@ -122,6 +123,6 @@ $ kubectl run -i --tty busybox --image=busybox -- sh # Run pod as interacti
$ kubectl attach <podname> -i # Attach to Running Container $ kubectl attach <podname> -i # Attach to Running Container
$ kubectl port-forward <podname> <local-and-remote-port> # Forward port of Pod to your local machine $ kubectl port-forward <podname> <local-and-remote-port> # Forward port of Pod to your local machine
$ kubectl port-forward <servicename> <port> # Forward port to service $ kubectl port-forward <servicename> <port> # Forward port to service
$ kubectl exec <pod-name> -- ls / # Run command in existing pod (1 container case) $ kubectl exec <pod-name> -- ls / # Run command in existing pod (1 container case)
$ kubectl exec <pod-name> -c <container-name> -- ls / # Run command in existing pod (multi-container case) $ kubectl exec <pod-name> -c <container-name> -- ls / # Run command in existing pod (multi-container case)
``` ```