78 lines
2.5 KiB
Bash
78 lines
2.5 KiB
Bash
#!/bin/bash
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set -e
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# Kubernetes 网络插件安装脚本
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# 功能: 在 Master 节点安装 Flannel 网络插件
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echo "==== 安装 Flannel 网络插件 ===="
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# 1. 下载 Flannel 配置文件
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echo "下载 Flannel 配置文件..."
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FLANNEL_VER="v0.27.4"
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curl -fsSL https://raw.githubusercontent.com/flannel-io/flannel/${FLANNEL_VER}/Documentation/kube-flannel.yml -O
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# 2. 修改 Flannel 配置
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echo "修改 Flannel 配置..."
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sed -i 's|"Network": "10.244.0.0/16"|"Network": "10.244.0.0/16"|g' kube-flannel.yml
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echo "预拉取 Flannel 相关镜像（优先国内镜像域名，拉取后回标官方名）..."
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DOCKER_MIRROR="docker.m.daocloud.io"
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REGISTRY_K8S_MIRROR="registry-k8s-io.mirrors.sjtug.sjtu.edu.cn"
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GHCR_MIRROR="ghcr.tencentcloudcr.com"
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IMAGES=(
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"registry.k8s.io/pause:3.8"
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"ghcr.io/flannel-io/flannel:${FLANNEL_VER}"
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)
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pull_and_tag() {
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local origin_ref="$1" # e.g. registry.k8s.io/pause:3.8
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local mirror_ref="$2" # e.g. registry-k8s-io.mirrors.sjtug.sjtu.edu.cn/pause:3.8
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echo "尝试从镜像 ${mirror_ref} 预拉取..."
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for i in $(seq 1 5); do
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if sudo ctr -n k8s.io images pull "${mirror_ref}"; then
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echo "打官方标签: ${origin_ref} <- ${mirror_ref}"
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sudo ctr -n k8s.io images tag "${mirror_ref}" "${origin_ref}" || true
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return 0
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fi
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echo "pull 失败，重试 ${i}/5..."; sleep 2
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done
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return 1
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}
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# 预拉取 pause 镜像
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echo "预拉取: registry.k8s.io/pause:3.8"
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if pull_and_tag "registry.k8s.io/pause:3.8" "${REGISTRY_K8S_MIRROR}/pause:3.8"; then
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echo "pause 镜像拉取成功"
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else
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echo "WARN: pause 镜像拉取失败，将由 kubelet 重试"
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fi
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# 预拉取 flannel 镜像
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echo "预拉取: ghcr.io/flannel-io/flannel:${FLANNEL_VER}"
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if pull_and_tag "ghcr.io/flannel-io/flannel:${FLANNEL_VER}" "${GHCR_MIRROR}/flannel-io/flannel:${FLANNEL_VER}"; then
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echo "flannel 镜像拉取成功"
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else
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echo "WARN: flannel 镜像拉取失败，将由 kubelet 重试"
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fi
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# 3. 安装 Flannel
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echo "安装 Flannel..."
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kubectl apply -f kube-flannel.yml
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# 4. 等待 Flannel 启动
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echo "等待 Flannel 组件就绪..."
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kubectl -n kube-flannel rollout status daemonset/kube-flannel-ds --timeout=600s || true
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kubectl wait --for=condition=ready pod -l app=flannel -n kube-flannel --timeout=600s || true
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echo "等待 CoreDNS 由 Pending 变为 Ready..."
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kubectl -n kube-system rollout status deploy/coredns --timeout=600s || true
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# 5. 验证网络插件
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echo "==== 验证 Flannel 安装 ===="
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kubectl get pods -n kube-flannel
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kubectl get nodes
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echo "==== Flannel 网络插件安装完成 ===="
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