get-cluster-info.sh

#!/bin/bash
# Extract cluster information to check compatibility with Alcide Support Matrix

printf "Extracting Cluster Information...\n"

# Check if kubectl is accessible
if ! command -v kubectl &> /dev/null
then
    printf "ERROR: kubectl command cannot be found. Please install kubectl for running this utility \n"
    exit 1
fi

# Check if kubectl working for the current context
if ! kubectl get pods > /dev/null
then
  echo "kubectl is failing for the current context"
  exit 1
fi

printf "Cluster Context\n"
printf "==============\n"
kubectl config current-context
printf "\n"

printf "Check network accessibility to Alcide's cloud\n"
printf "=============================================\n"
kubectl run -it --rm --restart=Never --image alcide/net-check alcide-net-check \
ca-service.prod.cloud.alcide.io:31443 \
kafka-0.kafka-service.prod.cloud.alcide.io:30000 \
kafka-1.kafka-service.prod.cloud.alcide.io:30001 \
kafka-2.kafka-service.prod.cloud.alcide.io:30002 \
free.cloud.alcide.io:443 \
ca-service.free.cloud.alcide.io:31443 \
kafka-0.kafka-service.free.cloud.alcide.io:30000 \
kafka-1.kafka-service.free.cloud.alcide.io:30001 \
kafka-2.kafka-service.free.cloud.alcide.io:30002
printf "\n"


printf "Nodes Cloud Provider\n"
printf "====================\n"
kubectl get nodes -o go-template='{{range.items}}{{.spec.providerID}}{{"\n"}}{{end}}' | sed 's/:.*//g' | sort | uniq
printf "\n"


printf "Kuberntes conrol plane version\n"
printf "==============================\n"
# check if jq is available. If yes then print concise info
if command -v jq &> /dev/null
then
    kubectl version -o json | jq .serverVersion.gitVersion
else
    kubectl version | grep "Server"
fi
printf "\n"

printf "kubelet Version\n"
printf "===============\n"
kubectl get nodes -o go-template='{{range.items}}{{.status.nodeInfo.kubeletVersion}}{{"\n"}}{{end}}' | sort | uniq
printf "\n"

printf "Container run time\n"
printf "==================\n"
kubectl get nodes -o go-template='{{range.items}}{{.status.nodeInfo.containerRuntimeVersion}}{{"\n"}}{{end}}' | sort | uniq
printf "\n"

printf "Operating System\n"
printf "================\n"
kubectl get nodes -o go-template='{{range.items}}{{.status.nodeInfo.operatingSystem}}{{"\n"}}{{end}}' | sort | uniq
printf "\n"

printf "OS Image\n"
printf "========\n"
kubectl get nodes -o go-template='{{range.items}}{{.status.nodeInfo.osImage}}{{"\n"}}{{end}}' | sort | uniq
printf "\n"

printf "Kernel version\n"
printf "==============\n"
kubectl get nodes -o go-template='{{range.items}}{{.status.nodeInfo.kernelVersion}}{{"\n"}}{{end}}' | sort | uniq
printf "\n"

printf "CNI - looking for image or labels with the cni name in it...\n"
printf "============================================================\n"
kubectl get pods --all-namespaces -o go-template='{{range.items}}{{range.spec.containers}}{{.image}}{{"\n"}}{{end}}{{end}}' | sort | uniq | grep -i 'cni'
kubectl get nodes -o go-template='{{range.items}}{{range.metadata.labels}}{{.}}{{"\n"}}{{end}}{{end}}'  | sort | uniq | grep -i 'cni'
printf "\n"

printf "Storage Classes Provisioners (help detection K8s provisioner - EKS/GKE/AKS etc.)\n"
printf "============================================================\n"
kubectl get storageclasses -n kube-system -o custom-columns=PROVISIONER:.provisioner --no-headers | sort | uniq

printf "\n"

printf "done!\n"