273 lines
8.0 KiB
Bash
273 lines
8.0 KiB
Bash
#!/bin/bash
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# Kubernetes 自动部署脚本
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# 用于从私有 Harbor 仓库拉取 NGINX 镜像并部署到 K8s 集群
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set -e
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# 颜色输出
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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BLUE='\033[0;34m'
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NC='\033[0m' # No Color
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# 打印带颜色的信息
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print_info() {
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echo -e "${BLUE}[INFO]${NC} $1"
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}
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print_success() {
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echo -e "${GREEN}[SUCCESS]${NC} $1"
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}
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print_warning() {
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echo -e "${YELLOW}[WARNING]${NC} $1"
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}
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print_error() {
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echo -e "${RED}[ERROR]${NC} $1"
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}
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# 检查必要的环境变量
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check_env_vars() {
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print_info "检查环境变量..."
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required_vars=("HARBOR_REGISTRY" "HARBOR_USERNAME" "HARBOR_PASSWORD" "NGINX_IMAGE_TAG")
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missing_vars=()
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for var in "${required_vars[@]}"; do
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if [[ -z "${!var}" ]]; then
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missing_vars+=("$var")
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fi
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done
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if [[ ${#missing_vars[@]} -gt 0 ]]; then
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print_error "缺少必要的环境变量:"
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for var in "${missing_vars[@]}"; do
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echo " - $var"
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done
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print_info "请设置以下环境变量:"
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echo " export HARBOR_REGISTRY=<你的Harbor仓库地址>"
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echo " export HARBOR_USERNAME=<Harbor用户名>"
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echo " export HARBOR_PASSWORD=<Harbor密码>"
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echo " export NGINX_IMAGE_TAG=<镜像标签，如: \${GITHUB_SHA} 或 latest>"
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exit 1
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fi
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print_success "环境变量检查通过"
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}
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# 检查 kubectl 连接
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check_kubectl() {
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print_info "检查 kubectl 连接..."
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if ! command -v kubectl &> /dev/null; then
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print_error "kubectl 未安装或不在 PATH 中"
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exit 1
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fi
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if ! kubectl cluster-info &> /dev/null; then
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print_error "无法连接到 Kubernetes 集群"
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print_info "请确保:"
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echo " 1. kubectl 已正确配置"
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echo " 2. 能够访问 Kubernetes 集群"
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echo " 3. 当前用户有适当的权限"
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exit 1
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fi
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print_success "kubectl 连接正常"
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kubectl cluster-info
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}
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# 创建命名空间（如果不存在）
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create_namespace() {
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local namespace=${1:-default}
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print_info "检查命名空间: $namespace"
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if kubectl get namespace "$namespace" &> /dev/null; then
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print_success "命名空间 '$namespace' 已存在"
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else
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print_info "创建命名空间: $namespace"
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kubectl create namespace "$namespace"
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print_success "命名空间 '$namespace' 创建成功"
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fi
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}
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# 创建或更新 Harbor 仓库访问凭据
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create_harbor_secret() {
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local namespace=${1:-default}
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print_info "创建/更新 Harbor 仓库访问凭据..."
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# 删除已存在的 secret（如果存在）
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kubectl delete secret harbor-registry-secret -n "$namespace" --ignore-not-found=true
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# 创建新的 secret
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kubectl create secret docker-registry harbor-registry-secret \
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--docker-server="$HARBOR_REGISTRY" \
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--docker-username="$HARBOR_USERNAME" \
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--docker-password="$HARBOR_PASSWORD" \
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--namespace="$namespace"
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print_success "Harbor 仓库访问凭据创建成功"
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}
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# 更新部署文件中的镜像标签
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update_deployment_image() {
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local deployment_file="$1"
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local image_tag="$2"
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print_info "更新部署文件中的镜像标签: $image_tag"
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# 使用镜像完整路径
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local full_image="${HARBOR_REGISTRY}/test/nginx:${image_tag}"
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print_info "使用镜像: $full_image"
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# 备份原文件
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cp "$deployment_file" "${deployment_file}.bak"
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# 使用 sed 替换环境变量，替换 $HARBOR_REGISTRY 和 $NGINX_IMAGE_TAG
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sed -i.tmp "s|\$HARBOR_REGISTRY|${HARBOR_REGISTRY}|g" "$deployment_file"
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sed -i.tmp "s|\$NGINX_IMAGE_TAG|${image_tag}|g" "$deployment_file"
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# 如果有其他环境变量需要替换，可以继续添加类似的 sed 命令
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# 例如：sed -i.tmp "s|\$NAMESPACE|${NAMESPACE}|g" "$deployment_file"
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# 清理临时文件
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rm -f "${deployment_file}.tmp"
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print_success "镜像标签和环境变量替换完成，使用镜像: $full_image"
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}
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# 应用 Kubernetes 配置
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apply_k8s_config() {
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local deployment_file="$1"
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print_info "应用 Kubernetes 配置..."
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if [[ ! -f "$deployment_file" ]]; then
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print_error "部署文件不存在: $deployment_file"
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exit 1
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fi
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kubectl apply -f "$deployment_file"
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print_success "Kubernetes 配置应用成功"
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}
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# 等待部署就绪
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wait_for_deployment() {
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local deployment_name="nginx-deployment"
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local namespace=${1:-default}
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local timeout=${2:-300}
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print_info "等待部署就绪..."
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if kubectl wait --for=condition=available deployment/"$deployment_name" \
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--namespace="$namespace" --timeout="${timeout}s"; then
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print_success "部署已就绪"
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else
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print_error "部署超时，请检查部署状态"
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kubectl describe deployment "$deployment_name" -n "$namespace"
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exit 1
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fi
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}
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# 显示部署状态
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show_deployment_status() {
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local namespace=${1:-default}
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print_info "部署状态:"
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echo
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echo "=== Pods ==="
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kubectl get pods -l app=nginx -n "$namespace" -o wide
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echo
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echo "=== Services ==="
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kubectl get services -l app=nginx -n "$namespace"
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echo
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echo "=== Deployments ==="
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kubectl get deployments -l app=nginx -n "$namespace"
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echo
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echo "=== HPA ==="
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kubectl get hpa -l app=nginx -n "$namespace" 2>/dev/null || echo "HPA 未启用"
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echo
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echo "=== Events ==="
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kubectl get events --sort-by=.metadata.creationTimestamp -n "$namespace" | tail -10
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}
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# 获取访问信息
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get_access_info() {
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local namespace=${1:-default}
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print_info "获取访问信息..."
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local service_type=$(kubectl get service nginx-service -n "$namespace" -o jsonpath='{.spec.type}')
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case "$service_type" in
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"NodePort")
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local node_port=$(kubectl get service nginx-service -n "$namespace" -o jsonpath='{.spec.ports[0].nodePort}')
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local node_ip=$(kubectl get nodes -o jsonpath='{.items[0].status.addresses[?(@.type=="ExternalIP")].address}')
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if [[ -z "$node_ip" ]]; then
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node_ip=$(kubectl get nodes -o jsonpath='{.items[0].status.addresses[?(@.type=="InternalIP")].address}')
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fi
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print_success "NodePort 访问地址: http://${node_ip}:${node_port}"
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;;
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"LoadBalancer")
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print_info "等待 LoadBalancer 外部 IP..."
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local external_ip=$(kubectl get service nginx-service -n "$namespace" -o jsonpath='{.status.loadBalancer.ingress[0].ip}')
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if [[ -n "$external_ip" ]]; then
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print_success "LoadBalancer 访问地址: http://${external_ip}"
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else
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print_warning "LoadBalancer 外部 IP 仍在分配中"
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fi
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;;
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"ClusterIP")
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local cluster_ip=$(kubectl get service nginx-service -n "$namespace" -o jsonpath='{.spec.clusterIP}')
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print_success "ClusterIP 访问地址: http://${cluster_ip}"
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print_info "注意: ClusterIP 只能在集群内部访问"
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;;
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esac
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}
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# 主函数
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main() {
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print_info "开始 NGINX Kubernetes 自动部署..."
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# 设置默认值
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local namespace=${NAMESPACE:-default}
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local deployment_file=${DEPLOYMENT_FILE:-./nginx-deployment.yaml}
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local image_tag=${NGINX_IMAGE_TAG:-latest}
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# 执行部署步骤
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check_env_vars
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check_kubectl
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create_namespace "$namespace"
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create_harbor_secret "$namespace"
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update_deployment_image "$deployment_file" "$image_tag"
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apply_k8s_config "$deployment_file"
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wait_for_deployment "$namespace"
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show_deployment_status "$namespace"
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get_access_info "$namespace"
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print_success "🎉 NGINX 部署完成！"
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}
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# 清理函数
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cleanup() {
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print_info "执行清理操作..."
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# 恢复备份文件
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if [[ -f "./nginx-deployment.yaml.bak" ]]; then
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mv "./nginx-deployment.yaml.bak" "./nginx-deployment.yaml"
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fi
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}
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# 设置清理陷阱
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trap cleanup EXIT
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# 如果直接运行此脚本
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if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
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main "$@"
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fi
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