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Kubernetes

Get objects

Filter pods per label: 

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$ kubectl get pods -l "mycompanny.region=EU"

Get pod current metrics: 

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$ kubectl describe PodMetrics <pod_name>

List available API resources (which depends on the k8s server version): 

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$ kubectl api-resources -o wide
NAME                               SHORTNAMES                                          APIVERSION                             NAMESPACED   KIND                              VERBS
bindings                                                                               v1                                     true         Binding                           [create]
componentstatuses                  cs                                                  v1                                     false        ComponentStatus                   [get list]
configmaps                         cm                                                  v1                                     true         ConfigMap                         [create delete deletecollection get list patch update watch]
endpoints                          ep                                                  v1                                     true         Endpoints                         [create delete deletecollection get list patch update watch]
events                             ev                                                  v1                                     true         Event                             [create delete deletecollection get list patch update watch]
limitranges                        limits                                              v1                                     true         LimitRange                        [create delete deletecollection get list patch update watch]
namespaces                         ns                                                  v1                                     false        Namespace                         [create delete get list patch update watch]
nodes                              no                                                  v1                                     false        Node                              [create delete deletecollection get list patch update watch]
...

Logs

Get deployment logs: 

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$ kubectl logs deployment/<name-of-deployment>

Failure analysis

List non-running pods, display their events: 

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$ for pod in $(kubectl get pods --field-selector status.phase!=Running | grep -v "^NAME" | awk '{print $1}' | sort -u)
do
    echo "POD: {$pod}"
    kubectl get event --field-selector involvedObject.name=${pod}
    echo "----"
done