102 lines
3.1 KiB
Bash
Executable File
102 lines
3.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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# This script only fits for Linux, macOS adaptation will come soon
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set -o errexit
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set -o nounset
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set -o pipefail
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function usage() {
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echo "This script starts a kube cluster by kind."
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echo "Usage: hack/create-cluster.sh <CLUSTER_NAME> [KUBECONFIG]"
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echo "Example: hack/create-cluster.sh host /root/.kube/karmada.config"
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}
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CLUSTER_VERSION=${CLUSTER_VERSION:-"kindest/node:v1.26.0"}
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if [[ $# -lt 1 ]]; then
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usage
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exit 1
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fi
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CLUSTER_NAME=$1
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if [[ -z "${CLUSTER_NAME}" ]]; then
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usage
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exit 1
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fi
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if [[ -z "${2-}" ]]; then
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KUBECONFIG=$KUBECONFIG
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else
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KUBECONFIG=$2
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fi
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if [[ -z "${KUBECONFIG}" ]]; then
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usage
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exit 1
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fi
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# check kind
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REPO_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
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# shellcheck source=util.sh
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source "${REPO_ROOT}"/hack/util.sh
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util::cmd_must_exist "kind"
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if [ -f "${KUBECONFIG}" ];then
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echo "kubeconfig file is existed, new config will append to it."
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if kubectl config get-contexts "${CLUSTER_NAME}" --kubeconfig="${KUBECONFIG}"> /dev/null 2>&1;
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then
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echo "ERROR: failed to create new cluster for context '${CLUSTER_NAME}' existed in ${KUBECONFIG}. please remove it (use 'kubectl config delete-context') if your want to overwrite it."
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exit 1
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fi
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fi
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function rand() {
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min=$1
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max=$(($2-$min+1))
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num=$(date +%s%N)
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echo $(($num%$max+$min))
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}
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function generate_cidr() {
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local val=$(rand 1 254)
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echo "$1.${val}.0.0/16"
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}
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POD_CIDR=${POD_CIDR:-""}
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if [[ -z "${POD_CIDR}" ]]; then
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POD_CIDR=$(generate_cidr 10)
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fi
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SERVICE_CIDR=${SERVICE_CIDR:-""}
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if [[ -z "${SERVICE_CIDR}" ]]; then
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SERVICE_CIDR=$(generate_cidr 100)
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fi
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#generate for kindClusterConfig
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TEMP_PATH=$(mktemp -d)
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trap '{ rm -rf ${TEMP_PATH}; }' EXIT
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cp -rf "${REPO_ROOT}"/artifacts/kindClusterConfig/general-config.yaml "${TEMP_PATH}"/"${CLUSTER_NAME}"-config.yaml
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sed -i'' -e "s#{{pod_cidr}}#${POD_CIDR}#g" "${TEMP_PATH}"/"${CLUSTER_NAME}"-config.yaml
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sed -i'' -e "s#{{service_cidr}}#${SERVICE_CIDR}#g" "${TEMP_PATH}"/"${CLUSTER_NAME}"-config.yaml
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kind_log="$(mktemp --suffix=-kind.log)"
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echo "Creating cluster \"${CLUSTER_NAME}\" ..."
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kind create cluster --name "${CLUSTER_NAME}" --kubeconfig="${KUBECONFIG}" --image="${CLUSTER_VERSION}" --config="${TEMP_PATH}"/"${CLUSTER_NAME}"-config.yaml > ${kind_log} 2>&1 || (
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echo "Creating cluster ${CLUSTER_NAME} failed, see detail log in ${kind_log}."
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exit 1
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)
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rm -rf "${kind_log}"
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# Kind cluster's context name contains a "kind-" prefix by default.
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# Change context name to cluster name.
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kubectl config rename-context "kind-${CLUSTER_NAME}" "${CLUSTER_NAME}" --kubeconfig="${KUBECONFIG}"
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# Kind cluster uses `127.0.0.1` as kube-apiserver endpoint by default, thus kind clusters can't reach each other.
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# So we need to update endpoint with container IP.
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container_ip=$(docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' "${CLUSTER_NAME}-control-plane")
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kubectl config set-cluster "kind-${CLUSTER_NAME}" --server="https://${container_ip}:6443" --kubeconfig="${KUBECONFIG}"
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echo "cluster \"${CLUSTER_NAME}\" is created successfully!"
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echo "You can now use your cluster with:"
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echo kubectl cluster-info --context "${CLUSTER_NAME}" --kubeconfig "${KUBECONFIG}"
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