Kubernetes K8s/Monitoring

Actual cpu usage, not requested

$ kubectl get --raw /apis/metrics.k8s.io/v1beta1/pods

Events happening in cluser

kubectl -n kube-system get events --sort-by='{.lastTimestamp}'

kubectl -n kube-system get events -w

kubectl get events --field-selector type=Warning -w &

kubectl get pods -A -w -o wide | grep "^\|Running\|Terminating" &

Node cpu and memory utilization

alias util='kubectl get nodes | grep node | awk '\''{print $1}'\'' | xargs -I {} sh -c '\''echo   {} ; kubectl describe node {} | grep Allocated -A 5 | grep -ve Event -ve Allocated -ve percent -ve -- ; echo '\'''

Watch node events (& puts it in background on terminal)
```
kubectl get pods -A -o wide &
```

Get cpu metrics

# CPU for singel pod
kubectl top pod pd-691234f8-rabcw

# Get the metrics for all nodes
kubectl get --raw /apis/metrics.k8s.io/v1beta1/nodes | jq

# Get the metrics for all pods
kubectl get --raw /apis/metrics.k8s.io/v1beta1/pods | jq

# Get metrics.
kubectl get --raw /apis/metrics.k8s.io/v1beta1/namespaces/<namespace-name>/pods/<pod-name>

# k8s cluster auto scaler

kubectl -n kube-system describe configmap cluster-autoscaler-status

Add a sniffer as a sidecart to a pod

edit deployment and add

- name: tcpdump
   image: corfr/tcpdump
   command:
     - /bin/sleep
     - infinity

CategoryK8sKubernetes