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Balkrishna Pandey
Balkrishna Pandey

Posted on • Updated on

oc get all pods handy cheat sheet

#openshift #kubernetes
  • Pod which are not running Across all namespaces 
oc get po -A \
| grep -v Completed \
| awk -F"[ /]+" 'BEGIN{found=0} !/NAME/ {if ($3!=$4) { found=1; print $0}} END { if (!found) print "Not Found"}'
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  • Delete all pods which are not running across all namespaces 
oc get po -A \
| grep -v Completed \
| awk -F"[ /]+" 'BEGIN{found=0} !/NAME/ {if ($3!=$4) { found=1; print $0}} END { if (!found) print "Not Found"}' \
| awk  '{ printf "oc delete po %s -n %s \n", $2 , $1}'
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Next Copy and paste output from above command or run above command with |bash at the end.

  • Delete all failed pods in a single namespace where context is set 
oc get po -o wide \
| grep -v Completed \
| awk -F"[ /]+" 'BEGIN{found=0} !/NAME/ {if ($2!=$3) { found=1; print $0}} END { if (!found) print "Not Found"}' \
| awk  '{ printf "oc delete po %s  \n", $1 }'
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Next Copy and paste output from above command or run above command with |bash at the end.

  • Pods which are not running on openshift-ingress namespace. 
oc get po -n openshift-ingress \
| grep -v Completed \
| awk -F"[ /]+" 'BEGIN{found=0} !/NAME/ {if ($2!=$3) { found=1; print $0}} END { if (!found) print "Not Found"}'
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Here I am comparing column 2 with 3, notice header changes in oc get pods -A vs oc get pods

[root@bastion ~]# oc get pods | head -n 1
NAME          READY   STATUS    RESTARTS   AGE
[root@bastion ~]# oc get pods -A | head -n 1
NAMESPACE                                          NAME                                                              READY   STATUS                  RESTARTS   AGE
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  • Count all Pods per Nodes 
oc get nodes -o custom-columns=NODE:.metadata.name --no-headers \
| while read node; do 
echo "$node $(oc get pods --all-namespaces=true --field-selector spec.nodeName=$node --no-headers | wc -l)"; 
done
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  • Count Pods per Namespace 
oc get --all-namespaces=true pods \
| awk '{a[$1]++} END {for (i in a) {print i, a[i]}}'
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  • Pods which are running since 24h 
oc get pods --field-selector=status.phase=Running -o json \
| jq '.items[] | select(.metadata.creationTimestamp | fromdateiso8601 > (now - 86400)) | .metadata.name'
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  • Pods which are running since 24h in a specific node 
oc get pods  --field-selector=status.phase=Running,spec.nodeName=worker-11 -o json \
| jq '.items[] | select(.metadata.creationTimestamp | fromdateiso8601 > (now - 86400)) | .metadata.name'
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  • List all operators installed in OCP 
oc get csv --all-namespaces -o jsonpath='{range .items[*]}{"\n"}{.metadata.name}{end}' | sort | uniq
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  • Cleanup quay operator. Command is applicable for other operators as well, make sure to adjust the command. 
JOB_NAME=$(oc get job -n openshift-marketplace -o json | jq -r '.items[] | select(.spec.template.spec.containers[].env[].value|contains ("quay")) | .metadata.name')
echo $JOB_NAME
oc delete job $JOB_NAME -n openshift-marketplace
oc delete configmap $JOB_NAME -n openshift-marketplace
for i in `oc get ip -n openshift-operators | grep quay | awk '{ print $1}'`; do echo $i; oc delete ip $i -n openshift-operators; done;
CURRENT_CSV=$(oc get subscription quay-operator -n openshift-operators -o=jsonpath='{.status.currentCSV}')
echo $CURRENT_CSV
oc delete subscription quay-operator -n openshift-operators
oc delete csv  $CURRENT_CSV -n openshift-operators
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  • ODF device list 
for pod in `oc get pods -l app=csi-rbdplugin --no-headers|awk '{print $1}'`
do
echo $pod
oc exec -n openshift-storage $pod -c  csi-rbdplugin -- rbd device list
done
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ODF device list, grep for particular csi-vol

for pod in `oc get pods -l app=csi-rbdplugin --no-headers|awk '{print $1}'`
do
echo $pod
oc exec -n openshift-storage $pod -c  csi-rbdplugin -- rbd device list | grep csi-vol-8b0eade3-1995-11ed-973d-0a580a800311 
done
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Output of this command looks like this,

csi-rbdplugin-58mqv
...
5  ocs-storagecluster-cephblockpool           csi-vol-6e9e743b-1995-11ed-973d-0a580a800311 -    /dev/rbd5  
...
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Now we can unmap this device as follows,

oc exec -it csi-rbdplugin-66wtg -c csi-rbdplugin bash
rbd  device unmap /dev/rbd5 -o force
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