k8s-1.18.0版本-kubeadmin部署（提供阿里云镜像）（二）master节点

k8s-1.18.0版本-kubeadmin部署

（提供阿里云镜像）

个人服务器地址：http://101.201.140.7/wp-blog/

系统开启kube-proxy的ipvs前置条件

从k8s的1.8版本开始，kube-proxy引入了IPVS模式，IPVS模式与iptables同样基于Netfilter，但是采用的hash表，因此当service数量达到一定规模时，hash查表的速度优势就会显现出来，从而提高service的服务性能。

开启内核参数（上篇文章环境准备已经配置不再赘述）

安装

yum -y install ipvsadm  ipset

永久生效

modprobe br_netfilter
cat > /etc/sysconfig/modules/ipvs.modules <<EOF
#!/bin/bash
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- nf_conntrack_ipv4
EOF

chmod 755 /etc/sysconfig/modules/ipvs.modules && bash
/etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e
nf_conntrack_ipv4

配置kubernetes.repo

cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

yum安装

yum -y install kubeadm-1.18.0 kubectl-1.18.0 kubelet-1.18.0

开机自启

systemctl enable kubelet.service

初始化节点

kubeadm config print init-defaults > kubeadm-config.yaml

编辑

新增内容如下：

---
apiVersion: kubeproxy.config.k8s.io/v1alpha1
kind: KubeProxyConfiguration
featureGates:
  SupportIPVSProxyMode: true
mode: ipvs

下载镜像文件

docker pull registry.cn-beijing.aliyuncs.com/yunweijia/etcd:3.4.3-0
docker pull registry.cn-beijing.aliyuncs.com/yunweijia/coredns:1.6.7
docker pull registry.cn-beijing.aliyuncs.com/yunweijia/pause:3.2
docker pull registry.cn-beijing.aliyuncs.com/yunweijia/kube-controller-manager:v1.18.0
docker pull registry.cn-beijing.aliyuncs.com/yunweijia/kube-scheduler:v1.18.0
docker pull registry.cn-beijing.aliyuncs.com/yunweijia/kube-apiserver:v1.18.0
docker pull registry.cn-beijing.aliyuncs.com/yunweijia/kube-proxy:v1.18.0

重新打标签tag

docker tag  registry.cn-beijing.aliyuncs.com/yunweijia/kube-proxy:v1.18.0               k8s.gcr.io/kube-proxy:v1.18.0
docker tag  registry.cn-beijing.aliyuncs.com/yunweijia/kube-apiserver:v1.18.0           k8s.gcr.io/kube-apiserver:v1.18.0
docker tag  registry.cn-beijing.aliyuncs.com/yunweijia/kube-scheduler:v1.18.0           k8s.gcr.io/kube-scheduler:v1.18.0
docker tag  registry.cn-beijing.aliyuncs.com/yunweijia/kube-controller-manager:v1.18.0  k8s.gcr.io/kube-controller-manager:v1.18.0
docker tag  registry.cn-beijing.aliyuncs.com/yunweijia/pause:3.2                        k8s.gcr.io/pause:3.2
docker tag  registry.cn-beijing.aliyuncs.com/yunweijia/coredns:1.6.7                    k8s.gcr.io/coredns:1.6.7
docker tag  registry.cn-beijing.aliyuncs.com/yunweijia/etcd:3.4.3-0                     k8s.gcr.io/etcd:3.4.3-0

查看

[root@k8s-master01 ~]# docker images|grep yunweijia|grep -v flannel
registry.cn-beijing.aliyuncs.com/yunweijia/kube-proxy                v1.18.0             43940c34f24f        5 weeks ago         117MB
registry.cn-beijing.aliyuncs.com/yunweijia/kube-scheduler            v1.18.0             a31f78c7c8ce        5 weeks ago         95.3MB
registry.cn-beijing.aliyuncs.com/yunweijia/kube-apiserver            v1.18.0             74060cea7f70        5 weeks ago         173MB
registry.cn-beijing.aliyuncs.com/yunweijia/kube-controller-manager   v1.18.0             d3e55153f52f        5 weeks ago         162MB
registry.cn-beijing.aliyuncs.com/yunweijia/pause                     3.2                 80d28bedfe5d        2 months ago        683kB
registry.cn-beijing.aliyuncs.com/yunweijia/coredns                   1.6.7               67da37a9a360        3 months ago        43.8MB
registry.cn-beijing.aliyuncs.com/yunweijia/etcd                      3.4.3-0             303ce5db0e90        6 months ago        288MB

[root@k8s-master01 ~]# docker images|grep -v flannel|grep -v yunweijia
REPOSITORY                                                           TAG                 IMAGE ID            CREATED             SIZE
k8s.gcr.io/kube-proxy                                                v1.18.0             43940c34f24f        5 weeks ago         117MB
k8s.gcr.io/kube-controller-manager                                   v1.18.0             d3e55153f52f        5 weeks ago         162MB
k8s.gcr.io/kube-scheduler                                            v1.18.0             a31f78c7c8ce        5 weeks ago         95.3MB
k8s.gcr.io/kube-apiserver                                            v1.18.0             74060cea7f70        5 weeks ago         173MB
k8s.gcr.io/pause                                                     3.2                 80d28bedfe5d        2 months ago        683kB
k8s.gcr.io/coredns                                                   1.6.7               67da37a9a360        3 months ago        43.8MB
k8s.gcr.io/etcd                                                      3.4.3-0             303ce5db0e90        6 months ago        288MB

开始初始化

kubeadm init --config=kubeadm-config.yaml --upload-certs | tee
kubeadm-init.log

按照指示执行

  mkdir -p $HOME/.kube
  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
  sudo chown $(id -u):$(id -g) $HOME/.kube/config

查看所有空间的pod状态

kubectl get pod --all-namespaces

下载flannel的yml文件

wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

查看yaml需要的镜像

[root@k8s-master01 ~]# cat kube-flannel.yml |grep image|uniq
        image: quay.io/coreos/flannel:v0.12.0-amd64
        image: quay.io/coreos/flannel:v0.12.0-arm64
        image: quay.io/coreos/flannel:v0.12.0-arm
        image: quay.io/coreos/flannel:v0.12.0-ppc64le
        image: quay.io/coreos/flannel:v0.12.0-s390x

登录阿里云

阿里云镜像服务：https://www.aliyun.com/product/acr

拉取镜像

docker  pull  registry.cn-beijing.aliyuncs.com/yunweijia/flannel:v0.12.0-s390x
docker  pull  registry.cn-beijing.aliyuncs.com/yunweijia/flannel:v0.12.0-ppc64le
docker  pull  registry.cn-beijing.aliyuncs.com/yunweijia/flannel:v0.12.0-arm64
docker  pull  registry.cn-beijing.aliyuncs.com/yunweijia/flannel:v0.12.0-arm
docker  pull  registry.cn-beijing.aliyuncs.com/yunweijia/flannel:v0.12.0-amd64

重打标签tag或者修改yml文件--注意空格

docker  tag  registry.cn-beijing.aliyuncs.com/yunweijia/flannel:v0.12.0-s390x    quay.io/coreos/flannel:v0.12.0-s390x
docker  tag  registry.cn-beijing.aliyuncs.com/yunweijia/flannel:v0.12.0-ppc64le  quay.io/coreos/flannel:v0.12.0-ppc64le
docker  tag  registry.cn-beijing.aliyuncs.com/yunweijia/flannel:v0.12.0-arm64    quay.io/coreos/flannel:v0.12.0-arm64
docker  tag  registry.cn-beijing.aliyuncs.com/yunweijia/flannel:v0.12.0-arm      quay.io/coreos/flannel:v0.12.0-arm
docker  tag  registry.cn-beijing.aliyuncs.com/yunweijia/flannel:v0.12.0-amd64    quay.io/coreos/flannel:v0.12.0-amd64

加载flannel

查看所以pod全部信息 ，查看kube-system空间下的pod，-w一直刷新状态

kubectl apply -f kube-flannel.yml
kubectl get pod --all-namespaces -o wide
kubectl get pod -n kube-system
kubectl get pod --all-namespaces -w

[root@k8s-master01 ~]# kubectl get pod --all-namespaces -o wide
NAMESPACE     NAME                                   READY   STATUS    RESTARTS   AGE   IP               NODE           NOMINATED NODE   READINESS GATES
kube-system   coredns-66bff467f8-g5lmj               1/1     Running   0          21h   10.244.0.3       k8s-master01   <none>           <none>
kube-system   coredns-66bff467f8-ts7lw               1/1     Running   0          21h   10.244.0.2       k8s-master01   <none>           <none>
kube-system   etcd-k8s-master01                      1/1     Running   0          21h   192.168.20.162   k8s-master01   <none>           <none>
kube-system   kube-apiserver-k8s-master01            1/1     Running   0          21h   192.168.20.162   k8s-master01   <none>           <none>
kube-system   kube-controller-manager-k8s-master01   1/1     Running   0          21h   192.168.20.162   k8s-master01   <none>           <none>
kube-system   kube-flannel-ds-amd64-rn9vr            1/1     Running   0          20h   192.168.20.162   k8s-master01   <none>           <none>
kube-system   kube-proxy-h44zq                       1/1     Running   0          21h   192.168.20.162   k8s-master01   <none>           <none>
kube-system   kube-scheduler-k8s-master01            1/1     Running   0          21h   192.168.20.162   k8s-master01   <none>           <none>
[root@k8s-master01 ~]# kubectl get pod -n kube-system
NAME                                   READY   STATUS    RESTARTS   AGE
coredns-66bff467f8-g5lmj               1/1     Running   0          21h
coredns-66bff467f8-ts7lw               1/1     Running   0          21h
etcd-k8s-master01                      1/1     Running   0          21h
kube-apiserver-k8s-master01            1/1     Running   0          21h
kube-controller-manager-k8s-master01   1/1     Running   0          21h
kube-flannel-ds-amd64-rn9vr            1/1     Running   0          20h
kube-proxy-h44zq                       1/1     Running   0          21h
kube-scheduler-k8s-master01            1/1     Running   0          21h
[root@k8s-master01 ~]# kubectl get pod --all-namespaces -w
NAMESPACE     NAME                                   READY   STATUS    RESTARTS   AGE
kube-system   coredns-66bff467f8-g5lmj               1/1     Running   0          21h
kube-system   coredns-66bff467f8-ts7lw               1/1     Running   0          21h
kube-system   etcd-k8s-master01                      1/1     Running   0          21h
kube-system   kube-apiserver-k8s-master01            1/1     Running   0          21h
kube-system   kube-controller-manager-k8s-master01   1/1     Running   0          21h
kube-system   kube-flannel-ds-amd64-rn9vr            1/1     Running   0          20h
kube-system   kube-proxy-h44zq                       1/1     Running   0          21h
kube-system   kube-scheduler-k8s-master01            1/1     Running   0          21h

至此完成K8S-kubeadmin部署。后续还有二进制部署，高可用部署文档。欢迎大家关注我。

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