使用kubeadm安裝k8s時，有一步驟時下載images操作，一般度很多使用的方法是：使用docker images下載鏡像再次tag鏡像的名稱，然後初始化的時候在配置集羣子ip信息等
如下：
1.設置kubelet國內的pause鏡像
cat >/etc/sysconfig/kubelet<<EOF
KUBELET_EXTRA_ARGS="--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.1"
EOF
2.Kubeadm初始化
# 初始化時報錯提示沒有鏡像文件，需要先下載在初始化(下面腳本只適用1.15.3版本)
name=(kube-apiserver:v1.15.3空格kube-controller-manager:v1.15.3空格kube-scheduler:v1.15.3空格kube-proxy:v1.15.3空格pause:3.1空格etcd:3.3.10 coredns:1.3.1)
# 修改鏡像的名稱
for info in ${name[@]}
do
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/$info
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/$info k8s.gcr.io/$info
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/$info
Done
#初始化master
#kubectl --version#查看版本
#kubeadm init --kubernetes-version=v1.15.3 --pod-network-cidr=10.1.0.0/16 #--apiserver-advertise-address=192.168.191.11 --ignore-preflight-errors=Swap在此給大家介紹一個簡單的方法
#在獲得vip的master節點上生成創始化配置文件
kubeadm config print init-defaults > kubeadm-init.yaml #必須是yaml格式的文件
apiVersion: kubeadm.k8s.io/v1beta2
bootstrapTokens:
- groups:
- system:bootstrappers:kubeadm:default-node-token
token: abcdef.0123456789abcdef
ttl: 24h0m0s
usages:
- signing
- authentication
kind: InitConfiguration
localAPIEndpoint:
advertiseAddress: 192.168.191.30 #本機ip
bindPort: 6443
nodeRegistration:
criSocket: /var/run/dockershim.sock
name: k8s-3
taints:
- effect: NoSchedule
key: node-role.kubernetes.io/master
---
apiServer:
timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta2
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controlPlaneENDPOINT: "192.168.191.30:58443" #此項如沒有請自行添加，此處請填寫你的高可用的VIP地址及端口
controllerManager: {}
dns:
type: CoreDNS
etcd:
local:
dataDir: /var/lib/etcd
imageRepository: registry.cn-hangzhou.aliyuncs.com/google_containers #國內阿里的k8s鏡像元
kind: ClusterConfiguration
kubernetesVersion: v1.17.4 # 鏡像的版本
networking:
dnsDomain: cluster.local
podSubnet: 10.244.0.0/16 # pod的網段，沒有該設置，需要添加
serviceSubnet: 10.96.0.0/12
scheduler: {}
---
#使用ipvs ，需要自己安裝ipvsadm
apiVersion: kubeproxy.config.k8s.io/v1alpha1
kind: KubeProxyConfiguration
featureGates:
SupportIPVSProxyMode: true
mode: ipvs#查看需要的鏡像
[root@k8s-3 ~]# kubeadm config images list W0323 17:27:46.000689 63185 validation.go:28] Cannot validate kube-proxy config - no validator is available # 忽略 W0323 17:27:46.001023 63185 validation.go:28] Cannot validate kubelet config - no validator is available k8s.gcr.io/kube-apiserver:v1.17.4 k8s.gcr.io/kube-controller-manager:v1.17.4 k8s.gcr.io/kube-scheduler:v1.17.4 k8s.gcr.io/kube-proxy:v1.17.4 k8s.gcr.io/pause:3.1 k8s.gcr.io/etcd:3.4.3-0 k8s.gcr.io/coredns:1.6.5
#拉取需要的鏡像
kubeadm config images pull --config kubeadm-init.yaml
#初始化
kubeadm init --config kubeadm-init.yaml