...
https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands
Working with JSONPath
https://kubernetes.io/docs/reference/kubectl/jsonpath/
Fortunately we can script most of what we can query from the state of our kubernetes deployment using JSONPath. We can then use jq to do additional processing to get values as an option.
Get the full json output to design JSONPath queries
| Code Block | ||
|---|---|---|
| ||
kubectl get pods --all-namespaces -o json
# we are looking to shutdown a rogue pod that is not responding to the normal deletion commands - but it contains a generated name
onap onap-portal-portal-sdk-7c49c97955-smbws 0/2 Terminating 0 2d
ubuntu@onap-oom-obrien-rancher-e0:~$ kubectl get pods --field-selector=status.phase!=Running --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
onap onap-portal-portal-sdk-7c49c97955-smbws 0/2 Terminating 0 2d
#"spec": {"containers": [{},"name": "portal-sdk",
kubectl get pods --namespace onap -o jsonpath="{.items[*].spec.containers[0].name}"
portal-sdk
# so combining the two queries
kubectl get pods --field-selector=status.phase!=Running --all-namespaces -o jsonpath="{.items[*].metadata.name}"
onap-portal-portal-sdk-7c49c97955-smbws
# and wrapping it with a delete command
export POD_NAME=$(kubectl get pods --field-selector=status.phase!=Running --all-namespaces -o jsonpath="{.items[*].metadata.name}")
echo "$POD_NAME"
kubectl delete pods $POD_NAME --grace-period=0 --force -n onap
ubuntu@onap-oom-obrien-rancher-e0:~$ sudo ./term.sh
onap-portal-portal-sdk-7c49c97955-smbws
warning: Immediate deletion does not wait for confirmation that the running resource has been terminated. The resource may continue to run on the cluster indefinitely.
pod "onap-portal-portal-sdk-7c49c97955-smbws" force deleted
|
Installing a pod
| Code Block | ||||
|---|---|---|---|---|
| ||||
# automatically via cd.sh in LOG-326 # get the dev.yaml and set any pods you want up to true as well as fill out the openstack parameters sudo wget https://git.onap.org/oom/plain/kubernetes/onap/resources/environments/dev.yaml sudo cp logging-analytics/deploy/cd.sh . # or # manually cd oom/kubernetes/ sudo make clean sudo make all sudo make onap sudo helm install local/onap -n onap --namespace onap -f onap/resources/environments/disable-allcharts.yaml --set log.enabled=true # adding another (so) sudo helm upgrade local/onap --namespace onap -f onap/resources/environments/disable-allcharts.yaml --set so.enabled=true --set log.enabled=true |
Get the nodeport of a particular service
https://kubernetes.io/docs/reference/kubectl/jsonpath/
| Code Block | ||
|---|---|---|
| ||
# human readable list
kubectl get services --all-namespaces | grep robot
# machine readable number - via JSONPath
kubectl get --namespace onap -o jsonpath="{.spec.ports[0].nodePort}" services robot) |
...
| Code Block | ||
|---|---|---|
| ||
ubuntu@ip-172-31-20-218:~$ free
total used free shared buff/cache available
Mem: 251754696 111586672 45000724 193628 95167300 137158588
ubuntu@ip-172-31-20-218:~$ kubectl get pods --all-namespaces | grep onap | wc -l
164
ubuntu@ip-172-31-20-218:~$ kubectl get pods --all-namespaces | grep onap | grep -E '1/1|2/2' | wc -l
155
ubuntu@ip-172-31-20-218:~$ kubectl get pods --all-namespaces | grep -E '0/|1/2' | wc -l
8
ubuntu@ip-172-31-20-218:~$ kubectl get pods --all-namespaces | grep -E '0/|1/2'
onap dep-dcae-ves-collector-59d4ff58f7-94rpq 1/2 Running 0 4m
onap onap-aai-champ-68ff644d85-rv7tr 0/1 Running 0 59m
onap onap-aai-gizmo-856f86d664-q5pvg 1/2 CrashLoopBackOff 10 59m
onap onap-oof-85864d6586-zcsz5 0/1 ImagePullBackOff 0 59m
onap onap-pomba-kibana-d76b6dd4c-sfbl6 0/1 Init:CrashLoopBackOff 8 59m
onap onap-pomba-networkdiscovery-85d76975b7-mfk92 1/2 CrashLoopBackOff 11 59m
onap onap-pomba-networkdiscoveryctxbuilder-c89786dfc-qnlx9 1/2 CrashLoopBackOff 10 59m
onap onap-vid-84c88db589-8cpgr 1/2 CrashLoopBackOff 9 59m
|
Operations
Get failed/pending containers
...