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custom-cluster-v5.sh
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#!/bin/bash
###Set the authentication#####
RANCHER_URL="https://rancher.domain.com" ##--->MODIFY
CATTLE_ACCESS_KEY="" ##--->MODIFY
CATTLE_SECRET_KEY="" ##--->MODIFY
APITOKEN="$CATTLE_ACCESS_KEY:$CATTLE_SECRET_KEY"
##Generating Random Cluster name####
CLUSTER_NAME="cluster-$((RANDOM % 90000 + 10000))"
#############
####Check for Kubernetes version supported from Rancher API Directly### taken from https://github.com/superseb/tf-do-rancher2.git
# Look up latest available -- If you are using this then comment everything from ##Check Max supported - echo "RKE2 Version ..!!!
ALL_RKE2_K8S=$(curl -s $RANCHER_URL/v1-rke2-release/releases --insecure)
LATEST_RKE2_K8S=$(echo "$ALL_RKE2_K8S" | jq -r '.data[] | select(.type=="release") | .id' | tail -1)
RKE2_K8S_VERSION=$LATEST_RKE2_K8S
###################################
##Checking max supported k8s version for rke2 downstream#### -- This check from SUSE Suport Matrix Page
#echo "Checking max supported k8s version for rke2 downstream cluster"
#SUPPORTED_MAX_BASE_VERSION=$(curl -s https://www.suse.com/suse-rancher/support-matrix/all-supported-versions/rancher-v2-7-5/ | grep -i -A10 "Downstream Cluster Support" | grep "1.2*" | grep -v -i heading | awk {'print $1'} | head -n 1 | grep -oP '(?<=<td>).*?(?=</td>)')
#RKE2_K8S_VERSION=$(curl -s https://api.github.com/repos/rancher/rke2/releases | jq -r '.[].tag_name' | grep -E '^v'$SUPPORTED_MAX_BASE_VERSION'' | grep -v -E 'rc|alpha|beta' | sort -V | tail -n 1)
#echo "RKE2 version to be used is $RKE2_K8S_VERSION"
####Setting Node Credetials####
SSH_USERNAME="root"
read -r SSH_PASSWORD < ./password.txt
input_file="./ipaddress.txt"
mapfile -t ip_addresses < ./ipaddress.txt
for ip_address in "${ip_addresses[@]}"; do
echo "Found IP Address/es $ip_address"
#####---Checking is IP is reachable----####
echo "Checking if ssh connectivity to the given IP addresses"
sshpass -p "$SSH_PASSWORD" ssh -q -o StrictHostKeyChecking=no "$SSH_USERNAME"@"$ip_address" exit
if [ $? -eq 0 ]; then
####----Creating Cluster----####
echo "Creating CLuster with given details"
echo "RKE2 version to be used is $RKE2_K8S_VERSION"
CREATE_CLUSTER_RESPONSE=$(curl -k -u "${CATTLE_ACCESS_KEY}:${CATTLE_SECRET_KEY}" \
-s $RANCHER_URL/v1/provisioning.cattle.io.clusters \
-H 'content-type: application/json' \
--data-raw '{"type":"provisioning.cattle.io.cluster","metadata":{"namespace":"fleet-default","name":"'$CLUSTER_NAME'"},"spec":{"rkeConfig":{"chartValues":{"rke2-calico":{}},"upgradeStrategy":{"controlPlaneConcurrency":"1","controlPlaneDrainOptions":{"deleteEmptyDirData":true,"disableEviction":false,"enabled":false,"force":false,"gracePeriod":-1,"ignoreDaemonSets":true,"skipWaitForDeleteTimeoutSeconds":0,"timeout":120},"workerConcurrency":"1","workerDrainOptions":{"deleteEmptyDirData":true,"disableEviction":false,"enabled":false,"force":false,"gracePeriod":-1,"ignoreDaemonSets":true,"skipWaitForDeleteTimeoutSeconds":0,"timeout":120}},"machineGlobalConfig":{"cni":"calico","disable-kube-proxy":false,"etcd-expose-metrics":false},"machineSelectorConfig":[{"config":{"protect-kernel-defaults":false}}],"etcd":{"disableSnapshots":false,"s3":null,"snapshotRetention":5,"snapshotScheduleCron":"0 */5 * * *"},"registries":{"configs":{},"mirrors":{}},"machinePools":[]},"machineSelectorConfig":[{"config":{}}],"kubernetesVersion":"'$RKE2_K8S_VERSION'","defaultPodSecurityAdmissionConfigurationTemplateName":"","localClusterAuthEndpoint":{"enabled":false,"caCerts":"","fqdn":""}}}')
sleep 10
echo "Fetching CLuster Id"
CLUSTERID=$(curl -s ${RANCHER_URL}/v3/clusters?name=${CLUSTER_NAME} -H 'content-type: application/json' -H "Authorization: Bearer $APITOKEN" --insecure | jq -r .data[].id)
if [ -n "$CLUSTERID" ]; then
echo "Cluster ID fetched - Cluster ID is $CLUSTERID - Continuing further to fetch registration url"
sleep 10
echo "Fetching Registration URL"
REGISTRATION_RESPONSE=$(curl -k -u "${CATTLE_ACCESS_KEY}:${CATTLE_SECRET_KEY}" --request GET $RANCHER_URL/v3/clusters/$CLUSTERID/clusterregistrationtokens --header 'Content-Type: application/json')
sleep 10
REGISTRATION_LINK=$(echo "${REGISTRATION_RESPONSE}" | jq -r '.data[0].insecureNodeCommand')
REGISTRATION_URL=""$REGISTRATION_LINK" --worker --controlplane --etcd"
echo "Registration URL is "$REGISTRATION_URL""
echo "Executing Registration URL in Node"
input_file="./ipaddress.txt"
remote_file=/etc/rancher/rke2/rke2.yaml
localpath=./$CLUSTER_NAME/
mapfile -t ip_addresses < ./ipaddress.txt
for ip_address in "${ip_addresses[@]}"; do
echo "Found IP Address/es $ip_address"
echo "Checking if ssh can be done"
sshpass -p "$SSH_PASSWORD" ssh -q -o StrictHostKeyChecking=no "$SSH_USERNAME"@"$ip_address" exit
if [ $? -eq 0 ]; then
echo "SSH Connection is successful..Continuing with Registering to cluster"
echo "Running remote SSH command on $ip_address"
sshpass -p "$SSH_PASSWORD" ssh -v -o StrictHostKeyChecking=no "$SSH_USERNAME"@"$ip_address" "$REGISTRATION_URL"
sleep 30
mkdir ./$CLUSTER_NAME
sshpass -p "$SSH_PASSWORD" scp "$SSH_USERNAME"@"$ip_address":"$remote_file" "$localpath"
echo "Cluster created cleaning up IP file"
echo > $input_file
echo "RKE2 Cluster with name $CLUSTER_NAME created successfully on node $ip_address and the kube config file has been saved as /root/$CLUSTER_NAME/config.yaml"
else
echo "SSH connection failed. Terminating...Please check connectivity and retry"
echo "Cleaning UP Empty Cluster"
DELETE_EMPTY_CLUSTER=$(curl -k -u $APITOKEN -s "$RANCHER_URL/v1/provisioning.cattle.io.clusters/fleet-default/$CLUSTER_NAME" -X 'DELETE')
echo "Cluster $CLUSTER_NAME was deleted as Rancher could not assign resource to it..Please check if the node is still accessible and retry..!!! "
exit 1
fi
done
else
echo "Couldnt Fetch Cluster ID - Seems Like there is a problem - Terminating the script - Please check if cluster has been created and re-run script"
exit 1
fi
else
echo "Initial SSH connection failed. Terminating...Please check connectivity and verify Node/Nodes are up"
exit 1
fi
done