拉取镜像
[root@master01 ~]# kubeadm --kubernetes-version=v1.18.3 config images list #列出所需镜像
[root@master01 ~]# cat config/downimage.sh #确认版本
#!/bin/sh
#****************************************************************#
# ScriptName: downimage.sh
# Author: xhy
# Create Date: 2020-05-29 19:55
# Modify Author: xhy
# Modify Date: 2020-06-10 19:15
# Version: v2
#***************************************************************#
KUBE_VERSION=v1.18.3
CALICO_VERSION=v3.14.1
CALICO_URL=calico
KUBE_PAUSE_VERSION=3.2
ETCD_VERSION=3.4.3-0
CORE_DNS_VERSION=1.6.7
GCR_URL=k8s.gcr.io
METRICS_SERVER_VERSION=v0.3.6
INGRESS_VERSION=0.32.0
CSI_PROVISIONER_VERSION=v1.4.0
CSI_NODE_DRIVER_VERSION=v1.2.0
CSI_ATTACHER_VERSION=v2.0.0
CSI_RESIZER_VERSION=v0.3.0
ALIYUN_URL=registry.cn-hangzhou.aliyuncs.com/google_containers
UCLOUD_URL=uhub.service.ucloud.cn/uxhy
QUAY_URL=quay.io
kubeimages=(kube-proxy:${KUBE_VERSION}
kube-scheduler:${KUBE_VERSION}
kube-controller-manager:${KUBE_VERSION}
kube-apiserver:${KUBE_VERSION}
pause:${KUBE_PAUSE_VERSION}
etcd:${ETCD_VERSION}
coredns:${CORE_DNS_VERSION}
metrics-server-amd64:${METRICS_SERVER_VERSION}
)
for kubeimageName in ${kubeimages[@]} ; do
docker pull $UCLOUD_URL/$kubeimageName
docker tag $UCLOUD_URL/$kubeimageName $GCR_URL/$kubeimageName
docker rmi $UCLOUD_URL/$kubeimageName
done
calimages=(cni:${CALICO_VERSION}
pod2daemon-flexvol:${CALICO_VERSION}
node:${CALICO_VERSION}
kube-controllers:${CALICO_VERSION})
for calimageName in ${calimages[@]} ; do
docker pull $UCLOUD_URL/$calimageName
docker tag $UCLOUD_URL/$calimageName $CALICO_URL/$calimageName
docker rmi $UCLOUD_URL/$calimageName
done
ingressimages=(nginx-ingress-controller:${INGRESS_VERSION})
for ingressimageName in ${ingressimages[@]} ; do
docker pull $UCLOUD_URL/$ingressimageName
docker tag $UCLOUD_URL/$ingressimageName $QUAY_URL/kubernetes-ingress-controller/$ingressimageName
docker rmi $UCLOUD_URL/$ingressimageName
done
csiimages=(csi-provisioner:${CSI_PROVISIONER_VERSION}
csi-node-driver-registrar:${CSI_NODE_DRIVER_VERSION}
csi-attacher:${CSI_ATTACHER_VERSION}
csi-resizer:${CSI_RESIZER_VERSION}
)
for csiimageName in ${csiimages[@]} ; do
docker pull $UCLOUD_URL/$csiimageName
docker tag $UCLOUD_URL/$csiimageName $QUAY_URL/k8scsi/$csiimageName
docker rmi $UCLOUD_URL/$csiimageName
done
[root@master01 ~]# for all_ip in ${ALL_IPS[@]}
do
echo ">>> ${all_ip}"
scp -rp config/downimage.sh root@${all_ip}:/root/
ssh root@${all_ip} "bash downimage.sh &"
done
提示：如上仅需Master01节点操作，从而实现所有节点自动拉取镜像。
[root@master01 ~]# docker images #确认验证
Master上初始化
[root@master01 ~]# kubeadm init --config=kubeadm-config.yaml --upload-certs
You can now join any number of the control-plane node running the following command on each as root:
kubeadm join 172.24.8.100:16443 --token xifg5c.3mvph3nwx1srdf7l \
--discovery-token-ca-cert-hash sha256:031a8758ddad5431be4132ecd6445f33b17c2192c11e010209705816a4a53afd \
--control-plane --certificate-key 560c926e508ed6011cd35fe120a5163d3ca32e16b745cf1877da970e3e0982f0
Please note that the certificate-key gives access to cluster sensitive data, keep it secret!
As a safeguard, uploaded-certs will be deleted in two hours; If necessary, you can use
"kubeadm init phase upload-certs --upload-certs" to reload certs afterward.
Then you can join any number of worker nodes by running the following on each as root:
kubeadm join 172.24.8.100:16443 --token xifg5c.3mvph3nwx1srdf7l \
--discovery-token-ca-cert-hash sha256:031a8758ddad5431be4132ecd6445f33b17c2192c11e010209705816a4a53afd
注意：如上token具有默认24小时的有效期，token和hash值可通过如下方式获取：
kubeadm token list
如果 Token 过期以后，可以输入以下命令，生成新的 Token：
kubeadm token create
openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt | openssl rsa -pubin -outform der 2>/dev/null | openssl dgst -sha256 -hex | sed 's/^.* //'
[root@master01 ~]# mkdir -p $HOME/.kube
[root@master01 ~]# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
[root@master01 ~]# sudo chown $(id -u):$(id -g) $HOME/.kube/config
[root@master01 ~]# cat << EOF >> ~/.bashrc
export KUBECONFIG=$HOME/.kube/config
EOF
#设置KUBECONFIG环境变量
[root@master01 ~]# echo "source <(kubectl completion bash)" >> ~/.bashrc
[root@master01 ~]# source ~/.bashrc
**附加：初始化过程大致步骤如下：**
[kubelet-start] 生成kubelet的配置文件”/var/lib/kubelet/config.yaml”
[certificates]生成相关的各种证书
[kubeconfig]生成相关的kubeconfig文件
[bootstraptoken]生成token记录下来，后边使用kubeadm join往集群中添加节点时会用到
