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Kubernetes1.9 二进制版集群+ipvs+coredns

docker dewbay 1年前 (2019-04-12) 590次浏览 已收录 0个评论 扫描二维码
文章目录[隐藏]

本版本用 kube-router 组件取代 kube-proxy,用 lvs 做 svc 负载均衡,更快稳定。

coredns取代 kube-dns,更稳定。

经过测试 1.9 版,消除了以往的 kubelet docker 狂报错误日志的错误 ,更完美。

节点构造如下 :

节点 ip节点角色hostname
192.168.0.57nodebigdata3
192.168.0.56nodebigdata4
192.168.0.58nodebigdata5
192.168.0.48master01ingest01
192.168.0.49master02ingest02
192.168.0.50master03ingest03
192.168.0.38etcd01etcd01
192.168.0.39etcd02etcd02
192.168.0.40etcd03etcd03

集群网络结构:

网络名称网络范围
集群网络172.20.0.0/16
svc 网络172.21.0.0/16
物理网络192.168.0.0/24

组件配置:

系统参数
系统centos7
内核版本4.4
docker-data 数据盘ext4
docker1.126
StorageDriver: overlay2
BackingFilesystem: extfs
LoggingDriver: journald
CgroupDriver: systemd

一、所有节点升级内核,安装 Docker 1.126

1.1 升级内核

rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm ;yum --enablerepo=elrepo-kernel install  kernel-lt-devel kernel-lt -y

#查看默认启动顺序
awk -F\' '$1=="menuentry " {print $2}' /etc/grub2.cfg  

CentOS Linux (4.4.4-1.el7.elrepo.x86_64) 7 (Core)  
CentOS Linux (3.10.0-327.10.1.el7.x86_64) 7 (Core)  
CentOS Linux (0-rescue-c52097a1078c403da03b8eddeac5080b) 7 (Core)

#默认启动的顺序是从 0 开始,新内核是从头插入(目前位置在 0,而 4.4.4 的是在 1),所以需要选择 0。

grub2-set-default 0  

#重启
reboot

#检查内核,成功升级到 4.4
uname -a
Linux bigdata5 4.4.104-1.el7.elrepo.x86_64 #1 SMP Tue Dec 5 12:46:32 EST 2017 x86_64 x86_64 x86_64 GNU/Linux

1.2 所有节点安装 Docker, 修改文件系统为 ovelay2 驱动

#安装 docker
yum install docker-common-1.12.6 docker-client-1.12.6 docker-1.12.6-61 -y

#设置文件系统为 ovelay2 驱动
 cat /etc/docker/daemon.json
{
  "storage-driver": "overlay2"
}

1.3 所有节点安装ipvsadm

yum install ipvsadm -y

二、准备 k8s-node、master、etcd、flanneld 二进制文件

####注意所有的文件由 master ingest01 这台机下发,配置 ssh 信任所有机器
####下载目录为/root/
[root@ingest01 ~]# pwd
/root

wget https://dl.k8s.io/v1.9.0/kubernetes-server-linux-amd64.tar.gz

wget https://github.com/coreos/etcd/releases/download/v3.2.11/etcd-v3.2.11-linux-amd64.tar.gz

wget https://github.com/coreos/flannel/releases/download/v0.9.0/flannel-v0.9.0-linux-amd64.tar.gz

三、下发所有二进制文件

3.1 解压

tar xvf kubernetes-server-linux-amd64.tar.gz && tar xvf etcd-v3.2.11-linux-amd64.tar.gz && tar xvf flannel-v0.9.0-linux-amd64.tar.gz

3.2 创建 node,master ,etcd 所需的二进制目录并进行归类

mkdir -p  /root/kubernetes/server/bin/{node,master,etcd}
mv /root/kubernetes/server/bin/kubelet /root/kubernetes/server/bin/node/
mv /root/mk-docker-opts.sh /root/kubernetes/server/bin/node/
mv /root/flanneld /root/kubernetes/server/bin/node/

mv /root/kubernetes/server/bin/kube-* /root/kubernetes/server/bin/master/
mv /root/kubernetes/server/bin/kubelet /root/kubernetes/server/bin/master/
mv /root/kubernetes/server/bin/kubectl /root/kubernetes/server/bin/master/

mv /root/etcd-v3.2.4-linux-amd64/etcd* /root/kubernetes/server/bin/etcd/

3.3 下发 node 以及 flanneld 二进制文件

for node in bigdata3 bigdata4 bigdata5 ingest01;do
    rsync  -avzP   /root/kubernetes/server/bin/node/ ${node}:/usr/local/bin/
done

3.4 下发 master 二进制文件

for master in ingest01 ingets01 ingest03;do
    rsync  -avzP   /root/kubernetes/server/bin/master/ ${master}:/usr/local/bin/
done

3.5 下发 etcd 文件

for etcd in etcd01 etcd02 etcd03;do
    rsync  -avzP   /root/kubernetes/server/bin/etcd/ ${etcd}:/usr/local/bin/
done

四、创建集群 systemctl 启动服务 service 文件

4.1 创建服务归类文件夹

mkdir -p  /root/kubernetes/server/bin/{node-service,master-service,etcd-service,docker-service,ssl}

4.2 创建 node 所需的文件

#docker.service
cat >/root/kubernetes/server/bin/node-service/docker.service  <<'HERE'
[Unit]
Description=Docker Application Container Engine
Documentation=http://docs.docker.com
After=network.target
Wants=docker-storage-setup.service
Requires=docker-cleanup.timer

[Service]
Type=notify
NotifyAccess=all
KillMode=process
EnvironmentFile=-/etc/sysconfig/docker
EnvironmentFile=-/etc/sysconfig/docker-storage
EnvironmentFile=-/etc/sysconfig/docker-network
EnvironmentFile=/run/flannel/docker
Environment=GOTRACEBACK=crash
Environment=DOCKER_HTTP_HOST_COMPAT=1
Environment=PATH=/usr/libexec/docker:/usr/bin:/usr/sbin
ExecStart=/usr/bin/dockerd-current  $DOCKER_NETWORK_OPTIONS \
          --add-runtime docker-runc=/usr/libexec/docker/docker-runc-current \
          --default-runtime=docker-runc \
          --exec-opt native.cgroupdriver=systemd \
          --userland-proxy-path=/usr/libexec/docker/docker-proxy-current \
          $OPTIONS \
          $DOCKER_STORAGE_OPTIONS \
          $DOCKER_NETWORK_OPTIONS \
          $ADD_REGISTRY \
          $BLOCK_REGISTRY \
          $INSECURE_REGISTRY
ExecReload=/bin/kill -s HUP $MAINPID
LimitNOFILE=1048576
LimitNPROC=1048576
LimitCORE=infinity
TimeoutStartSec=0
Restart=on-abnormal
MountFlags=slave

[Install]
WantedBy=multi-user.target
HERE


----------


#kubeliet.service
cat >/root/kubernetes/server/bin/node-service/kubelet.service  <<'HERE'
[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=docker.service
Requires=docker.service
[Service]
WorkingDirectory=/var/lib/kubelet
ExecStart=/usr/local/bin/kubelet \
--address=192.168.0.48 \
--hostname-override=ingest01 \
--pod-infra-container-image=k8s-registry.local/public/pod-infrastructure:sfv1 \
--experimental-bootstrap-kubeconfig=/etc/kubernetes/ssl/bootstrap.kubeconfig \
--kubeconfig=/etc/kubernetes/ssl/kubelet.kubeconfig \
--cert-dir=/etc/kubernetes/ssl \
--hairpin-mode promiscuous-bridge \
--allow-privileged=true \
--serialize-image-pulls=false \
--logtostderr=true \
--cgroup-driver=systemd \
--cluster_dns=172.21.0.2 \
--cluster_domain=cluster.local \
--v=2
Restart=on-failure
RestartSec=5
[Install]
WantedBy=multi-user.target

HERE


----------


#flanneld.service

cat >/root/kubernetes/server/bin/node-service/flanneld.service  <<'HERE'
[Unit]
Description=Flanneld overlay address etcd agent
After=network.target
After=network-online.target
Wants=network-online.target
After=etcd.service
Before=docker.service
[Service]
Type=notify
ExecStart=/usr/local/bin/flanneld \
-etcd-cafile=/etc/kubernetes/ssl/k8s-root-ca.pem \
-etcd-certfile=/etc/kubernetes/ssl/kubernetes.pem \
-etcd-keyfile=/etc/kubernetes/ssl/kubernetes-key.pem \
-etcd-endpoints=https://192.168.0.38:2379,https://192.168.0.39:2379,https://192.168.0.40:2379 \
-etcd-prefix=/kubernetes/network \
-iface=eth0
ExecStartPost=/usr/local/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/docker
Restart=on-failure
[Install]
WantedBy=multi-user.target
RequiredBy=docker.service
HERE

4.3 创建 master 所需 service 文件

#kube-apiserver.service
cat >/root/kubernetes/server/bin/master-service/kube-apiserver.service  <<'HERE'
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver \
--admission-control=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,ResourceQuota,NodeRestriction \
--advertise-address=192.168.0.48 \
--bind-address=192.168.0.48 \
--insecure-bind-address=127.0.0.1 \
--kubelet-https=true \
--runtime-config=rbac.authorization.k8s.io/v1beta1 \
--authorization-mode=RBAC,Node \
--enable-bootstrap-token-auth \
--token-auth-file=/etc/kubernetes/ssl/token.csv \
--service-cluster-ip-range=172.21.0.0/16 \
--service-node-port-range=300-9000 \
--tls-cert-file=/etc/kubernetes/ssl/kubernetes.pem \
--tls-private-key-file=/etc/kubernetes/ssl/kubernetes-key.pem \
--client-ca-file=/etc/kubernetes/ssl/k8s-root-ca.pem \
--service-account-key-file=/etc/kubernetes/ssl/k8s-root-ca-key.pem \
--etcd-cafile=/etc/kubernetes/ssl/k8s-root-ca.pem \
--etcd-certfile=/etc/kubernetes/ssl/kubernetes.pem \
--etcd-keyfile=/etc/kubernetes/ssl/kubernetes-key.pem \
--etcd-servers=https://192.168.0.38:2379,https://192.168.0.39:2379,https://192.168.0.40:2379 \
--enable-swagger-ui=true \
--allow-privileged=true \
--apiserver-count=3 \
--audit-log-maxage=30 \
--audit-log-maxbackup=3 \
--audit-log-maxsize=100 \
--audit-log-path=/var/lib/audit.log \
--event-ttl=1h \
--v=2
Restart=on-failure
RestartSec=5
Type=notify
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target

HERE


----------


#kube-controller-manager.service
cat >/root/kubernetes/server/bin/master-service/kube-controller-manager.service  <<'HERE'
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
[Service]
ExecStart=/usr/local/bin/kube-controller-manager \
--address=127.0.0.1 \
--master=http://127.0.0.1:8080 \
--allocate-node-cidrs=true \
--service-cluster-ip-range=172.21.0.0/16 \
--cluster-cidr=172.20.0.0/16 \
--cluster-name=kubernetes \
--cluster-signing-cert-file=/etc/kubernetes/ssl/k8s-root-ca.pem \
--cluster-signing-key-file=/etc/kubernetes/ssl/k8s-root-ca-key.pem \
--service-account-private-key-file=/etc/kubernetes/ssl/k8s-root-ca-key.pem \
--root-ca-file=/etc/kubernetes/ssl/k8s-root-ca.pem \
--leader-elect=true \
--v=2
Restart=on-failure
RestartSec=5
[Install]
WantedBy=multi-user.target
HERE


----------


#kube-scheduler.service

cat >/root/kubernetes/server/bin/master-service/scheduler.service  <<'HERE'
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
[Service]
ExecStart=/usr/local/bin/kube-scheduler \
--address=127.0.0.1 \
--master=http://127.0.0.1:8080 \
--leader-elect=true \
--v=2
Restart=on-failure
RestartSec=5
[Install]
WantedBy=multi-user.target
HERE

4.4 创建 etcd 所需 service 文件
etcd 各节点请自行参照此配置进行更改

cat >/root/kubernetes/server/bin/etcd-service/etcd.service  <<'HERE'
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
Documentation=https://github.com/coreos
[Service]
Type=notify
WorkingDirectory=/var/lib/etcd/
EnvironmentFile=-/etc/etcd/etcd.conf
ExecStart=/usr/local/bin/etcd \
--name=etcd01 \
--cert-file=/etc/kubernetes/ssl/kubernetes.pem \
--key-file=/etc/kubernetes/ssl/kubernetes-key.pem \
--peer-cert-file=/etc/kubernetes/ssl/kubernetes.pem \
--peer-key-file=/etc/kubernetes/ssl/kubernetes-key.pem \
--trusted-ca-file=/etc/kubernetes/ssl/k8s-root-ca.pem \
--peer-trusted-ca-file=/etc/kubernetes/ssl/k8s-root-ca.pem \
--initial-advertise-peer-urls=https://192.168.0.38:2380 \
--listen-peer-urls=https://192.168.0.38:2380 \
--listen-client-urls=https://192.168.0.38:2379,http://127.0.0.1:2379 \
--advertise-client-urls=https://192.168.0.38:2379 \
--initial-cluster-token=etcd-cluster-0 \
--initial-cluster=etcd01=https://192.168.0.38:2380,etcd02=https://192.168.0.39:2380,etcd03=https://192.168.0.40:2380 \
--initial-cluster-state=new \
--data-dir=/var/lib/etcd
Restart=on-failure
RestartSec=5
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
HERE

五、下发 service 文件

5.1 下发 node 所需的 service 文件

#注意更改 service 文件中的主机名和 ip,每个节点不一样
for node in {bigdata3,bigdata4,bigdata5,ingest01,ingest02,ingest03};do
    rsync  -avzP   /root/kubernetes/server/bin/node-service/ ${node}:/lib/systemd/system/
done

5.2 下发 master 所需的 service 文件

#注意更改 service 文件中的主机名和 ip,每个节点不一样
for master in {ingest01,ingest02,ingest03};do
    rsync  -avzP   /root/kubernetes/server/bin/master-service/ ${master}:/lib/systemd/system/
done

5.3 下发 etcd 所需的 service 文件

#注意更改 service 文件中的主机名和 ip,每个节点不一样
for master in {etcd01,etcd02,etcd03};do
    rsync  -avzP   /root/kubernetes/server/bin/etcd-service/ ${etcd}:/lib/systemd/system/
done

六、创建集群认证证书文件,下发文件

6.1 生成文件

#安装 CFSSL

#直接使用二进制源码包安装

wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
chmod +x cfssl_linux-amd64
mv cfssl_linux-amd64 /usr/local/bin/cfssl

wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
chmod +x cfssljson_linux-amd64
mv cfssljson_linux-amd64 /usr/local/bin/cfssljson

wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64
chmod +x cfssl-certinfo_linux-amd64
mv cfssl-certinfo_linux-amd64 /usr/local/bin/cfssl-certinfo

export PATH=/usr/local/bin:$PATH


----------


**#admin-csr.json**
cat >/root/kubernetes/server/bin/ssl/admin-csr.json  <<'HERE'
{
  "CN": "admin",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Shenzhen",
      "L": "Shenzhen",
      "O": "system:masters",
      "OU": "System"
    }
  ]
}
HERE


----------
#k8s-gencert.json
cat >/root/kubernetes/server/bin/ssl/k8s-gencert.json  <<'HERE'
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "kubernetes": {
        "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ],
        "expiry": "87600h"
      }
    }
  }
}
HERE


----------
#k8s-root-ca-csr.json
cat >/root/kubernetes/server/bin/ssl/k8s-root-ca-csr.json  <<'HERE'
{
  "CN": "kubernetes",
  "key": {
    "algo": "rsa",
    "size": 4096
  },
  "names": [
    {
      "C": "CN",
      "ST": "Shenzhen",
      "L": "Shenzhen",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
HERE


----------

#kube-proxy-csr.json
cat >/root/kubernetes/server/bin/ssl/kube-proxy-csr.json  <<'HERE'
{
  "CN": "system:kube-proxy",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Shenzhen",
      "L": "Shenzhen",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
HERE


----------
#注意,此处需要将 dns 首 ip、etcd、k8s-master 节点的 ip 都填上
cat >/root/kubernetes/server/bin/ssl/kubernetes-csr.json  <<'HERE'
{
    "CN": "kubernetes",
    "hosts": [
    "127.0.0.1",
    "192.168.0.56",
    "192.168.0.57",
    "192.168.0.58",
    "192.168.0.38",
    "192.168.0.39",
    "192.168.0.40",
    "192.168.0.48",
    "192.168.0.49",
    "192.168.0.50",
    "172.21.0.1",
    "kubernetes",
    "kubernetes.default",
    "kubernetes.default.svc",
    "kubernetes.default.svc.cluster",
    "kubernetes.default.svc.cluster.local"
     ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "ST": "Shenzhen",
            "L": "Shenzhen",
            "O": "k8s",
            "OU": "System"
        }
    ]
}
HERE


----------

6.2 生成通用证书以及 kubeconfig

#进入 ssl 目录
cd /root/kubernetes/server/bin/ssl/
# 生成证书
cfssl gencert --initca=true k8s-root-ca-csr.json | cfssljson --bare k8s-root-ca

for targetName in kubernetes admin kube-proxy; do
    cfssl gencert --ca k8s-root-ca.pem --ca-key k8s-root-ca-key.pem --config k8s-gencert.json --profile kubernetes $targetName-csr.json | cfssljson --bare $targetName
done

# 生成配置
#注意,此处定义 api-server 的服务 ip,此处用 HA 模式,如果你的 master 是单节点,请配置成单个 api6443 的 ip 即可
#注意关于三台 master 节点 HA 高可用请参见我另一篇 HA 实战
#地址:http://blog.csdn.net/idea77/article/details/71508859

export KUBE_APISERVER="https://127.0.0.1:6443"
export BOOTSTRAP_TOKEN=$(head -c 16 /dev/urandom | od -An -t x | tr -d ' ')
echo "Tokne: ${BOOTSTRAP_TOKEN}"

cat > token.csv <<EOF
${BOOTSTRAP_TOKEN},kubelet-bootstrap,10001,"system:kubelet-bootstrap"
EOF



----------

echo "Create kubelet bootstrapping kubeconfig..."
kubectl config set-cluster kubernetes \
  --certificate-authority=k8s-root-ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=bootstrap.kubeconfig
kubectl config set-credentials kubelet-bootstrap \
  --token=${BOOTSTRAP_TOKEN} \
  --kubeconfig=bootstrap.kubeconfig
kubectl config set-context default \
  --cluster=kubernetes \
  --user=kubelet-bootstrap \
  --kubeconfig=bootstrap.kubeconfig


----------


echo "Create kube-proxy kubeconfig..."
kubectl config set-cluster kubernetes \
  --certificate-authority=k8s-root-ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=kube-proxy.kubeconfig



----------


kubectl config set-credentials kube-proxy \
  --client-certificate=kube-proxy.pem \
  --client-key=kube-proxy-key.pem \
  --embed-certs=true \
  --kubeconfig=kube-proxy.kubeconfig



----------


kubectl config set-context default \
  --cluster=kubernetes \
  --user=kube-proxy \
  --kubeconfig=kube-proxy.kubeconfig
kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig


----------


# 生成高级审计配置
cat >> audit-policy.yaml <<EOF
# Log all requests at the Metadata level.
apiVersion: audit.k8s.io/v1beta1
kind: Policy
rules:
- level: Metadata
EOF


----------


# 生成集群管理员 admin kubeconfig 配置文件供 kubectl 调用
# admin set-cluster
 kubectl config set-cluster kubernetes \
    --certificate-authority=k8s-root-ca.pem\
    --embed-certs=true \
    --server=${KUBE_APISERVER} \
    --kubeconfig=./kubeconfig

# admin set-credentials
 kubectl config set-credentials kubernetes-admin \
    --client-certificate=admin.pem \
    --client-key=admin-key.pem \
    --embed-certs=true \
    --kubeconfig=./kubeconfig

# admin set-context
 kubectl config set-context kubernetes-admin@kubernetes \
    --cluster=kubernetes \
    --user=kubernetes-admin \
    --kubeconfig=./kubeconfig

# admin set default context
 kubectl config use-context kubernetes-admin@kubernetes \
    --kubeconfig=./kubeconfig

6.3 下发证书文件至所有节点

#创建 ssl 文件夹
for node in {bigdata3,bigdata4,bigdata5,ingest01,ingest02,ingest03,etcd01,etcd02,etcd03};do
    ssh ${node} "mkdir -p /etc/kubernetes/ssl/ "
done


----------

#下发文件
for ssl in {bigdata3,bigdata4,bigdata5,ingest01,ingest02,ingest03,etcd01,etcd02,etcd03};do
    rsync  -avzP   /root/kubernetes/server/bin/ssl/  ${ssl}:/etc/kubernetes/ssl/
done

----------

#创建 master /root/.kube 目录,复制超级 admin 授权 config
for master in {ingest01,ingest02,ingest03};do
    ssh ${master} "mkdir -p /root/.kube ; \cp -f /etc/kubernetes/ssl/kubeconfig  /root/.kube/config "
done


----------


七、启动所有节点服务,验证服务

注意启动之前确认配置文件修改无误

7.1 启动 etcd 节点服务

#启动 etcd 集群

for node in {etcd01,etcd02,etcd03};do
    ssh ${node} "systemctl daemon-reload && systemctl start etcd && systemctl enable etcd"
done


----------


#检查集群健康
 etcdctl \
  --ca-file=/etc/kubernetes/ssl/k8s-root-ca.pem\
  --cert-file=/etc/kubernetes/ssl/kubernetes.pem \
  --key-file=/etc/kubernetes/ssl/kubernetes-key.pem \
  cluster-health


----------
#设置集群网络范围

  etcdctl --endpoints=https://192.168.0.38:2379,https://192.168.0.39:2379,https://192.168.0.40:2379 \
  --ca-file=/etc/kubernetes/ssl/k8s-root-ca.pem \
  --cert-file=/etc/kubernetes/ssl/kubernetes.pem \
  --key-file=/etc/kubernetes/ssl/kubernetes-key.pem \
  mkdir /kubernetes/network


----------


etcdctl --endpoints=https://192.168.0.38:2379,https://192.168.0.39:2379,https://192.168.0.40:2379 \
  --ca-file=/etc/kubernetes/ssl/k8s-root-ca.pem\
  --cert-file=/etc/kubernetes/ssl/kubernetes.pem \
  --key-file=/etc/kubernetes/ssl/kubernetes-key.pem \
  mk /kubernetes/network/config '{ "Network": "172.20.0.0/16", "Backend": { "Type": "vxlan", "VNI": 1 }}'

----------

7.2 启动 master 节点服务

#注意关于三台 master 节点 HA 高可用请参见我另一篇 HA 实战
#地址:http://blog.csdn.net/idea77/article/details/71508859

for master in {ingest01,ingest02,ingest03};do
    ssh ${master} "systemctl daemon-reload && systemctl start flanneld docker kube-apiserver kube-controller-manager kube-scheduler kubelet && systemctl enable flanneld docker kube-apiserver kube-controller-manager kube-scheduler kubelet "
done

7.3 启动 node 节点服务

for node in {bigdata3,bigdata4,bigdata5};do
    ssh ${node} "systemctl daemon-reload && systemctl start flanneld docker kubelet && systemctl enable flanneld docker kubelet "
done

7.4 验证集群

# 在 master 机器上执行,授权 kubelet-bootstrap 角色
kubectl create clusterrolebinding kubelet-bootstrap \
  --clusterrole=system:node-bootstrapper \
  --user=kubelet-bootstrap

#通过所有集群认证
kubectl get csr

kubectl get csr | awk '/Pending/ {print $1}' | xargs kubectl certificate approve

#检查 node Ready
kubectl  get nodes 
NAME       STATUS    ROLES     AGE       VERSION
bigdata3   Ready     <none>    4d        v1.9.0
bigdata4   Ready     <none>    4d        v1.9.0
bigdata5   Ready     <none>    4d        v1.9.0
ingest01   Ready     <none>    4d        v1.9.0
ingest02   Ready     <none>    4d        v1.9.0
ingest03   Ready     <none>    4d        v1.9.0

八、布署 kube-router-ipvs 取代 kube-proxy、kube-dashboard、core-dns 取代 kube-dns

8.1 布署 kube-router 组件

#镜相下载:docker.io/cloudnativelabs/kube-router:latest
apiVersion: v1
kind: ConfigMap
metadata:
  name: kube-router-cfg
  namespace: kube-system
  labels:
    tier: node
    k8s-app: kube-router
data:
  cni-conf.json: |
    {
      "name":"kubernetes",
      "type":"bridge",
      "bridge":"kube-bridge",
      "isDefaultGateway":true,
      "ipam": {
        "type":"host-local"
      }
    }
---
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  labels:
    k8s-app: kube-router
    tier: node
  name: kube-router
  namespace: kube-system
spec:
  template:
    metadata:
      labels:
        k8s-app: kube-router
        tier: node
      annotations:
        scheduler.alpha.kubernetes.io/critical-pod: ''
    spec:
      serviceAccountName: kube-router
      serviceAccount: kube-router
      containers:
      - name: kube-router
        image: k8s-registry.local/public/kube-router:latest
        imagePullPolicy: Always
        args:
        - --run-router=true
        - --run-firewall=true
        - --run-service-proxy=true
        - --kubeconfig=/var/lib/kube-router/kubeconfig
        env:
        - name: NODE_NAME
          valueFrom:
            fieldRef:
              fieldPath: spec.nodeName
        resources:
          requests:
            cpu: 250m
            memory: 250Mi
        securityContext:
          privileged: true
        volumeMounts:
        - name: lib-modules
          mountPath: /lib/modules
          readOnly: true
        - name: cni-conf-dir
          mountPath: /etc/cni/net.d
        - name: kubeconfig
          mountPath: /var/lib/kube-router/kubeconfig
        - name: run
          mountPath: /var/run/docker.sock
          readOnly: true
      initContainers:
      - name: install-cni
        image: k8s-registry.local/public/busybox:latest
        imagePullPolicy: Always
        command:
        - /bin/sh
        - -c
        - set -e -x;
          if [ ! -f /etc/cni/net.d/10-kuberouter.conf ]; then
            TMP=/etc/cni/net.d/.tmp-kuberouter-cfg;
            cp /etc/kube-router/cni-conf.json ${TMP};
            mv ${TMP} /etc/cni/net.d/10-kuberouter.conf;
          fi
        volumeMounts:
        - name: cni-conf-dir
          mountPath: /etc/cni/net.d
        - name: kube-router-cfg
          mountPath: /etc/kube-router
      hostNetwork: true
      hostIPC: true
      hostPID: true
      tolerations:
      - key: CriticalAddonsOnly
        operator: Exists
      - effect: NoSchedule
        key: node-role.kubernetes.io/master
        operator: Exists
      volumes:
      - name: lib-modules
        hostPath:
          path: /lib/modules
      - name: cni-conf-dir
        hostPath:
          path: /etc/cni/net.d
      - name: run
        hostPath:
          path: /var/run/docker.sock
      - name: kube-router-cfg
        configMap:
          name: kube-router-cfg
      - name: kubeconfig
        hostPath:
          path: /etc/kubernetes/ssl/kubeconfig
       # configMap:
        #  name: kube-proxy
         # items:
         # - key: kubeconfig.conf
         #   path: kubeconfig
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: kube-router
  namespace: kube-system
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: kube-router
  namespace: kube-system
rules:
  - apiGroups:
    - ""
    resources:
      - namespaces
      - pods
      - services
      - nodes
      - endpoints
    verbs:
      - list
      - get
      - watch
  - apiGroups:
    - "networking.k8s.io"
    resources:
      - networkpolicies
    verbs:
      - list
      - get
      - watch
  - apiGroups:
    - extensions
    resources:
      - networkpolicies
    verbs:
      - get
      - list
      - watch
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: kube-router
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: kube-router
subjects:
- kind: ServiceAccount
  name: kube-router
  namespace: kube-system



kubectl create -f kube-router.yaml

8.2 布署 kube-dashboard

#镜相下载:registry.docker-cn.com/kubernetesdashboarddev/kubernetes-dashboard-amd64:head
apiVersion: v1
kind: ServiceAccount
metadata:
  name: kubernetes-dashboard
  namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
  name: kubernetes-dashboard
  labels:
    k8s-app: kubernetes-dashboard
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
- kind: ServiceAccount
  name: kubernetes-dashboard
  namespace: kube-system
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: kubernetes-dashboard
  namespace: kube-system
  labels:
    k8s-app: kubernetes-dashboard
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
spec:
  selector:
    matchLabels:
      k8s-app: kubernetes-dashboard
  template:
    metadata:
      labels:
        k8s-app: kubernetes-dashboard
      annotations:
        scheduler.alpha.kubernetes.io/critical-pod: ''
    spec:
      serviceAccountName: kubernetes-dashboard
      containers:
      - name: kubernetes-dashboard
        image: k8s-registry.local/public/kubernetes-dashboard-amd64:1.8.0
        resources:
          # keep request = limit to keep this container in guaranteed class
          limits:
            cpu: 100m
            memory: 300Mi
          requests:
            cpu: 100m
            memory: 100Mi
        ports:
        - containerPort: 9090
        livenessProbe:
          httpGet:
            path: /
            port: 9090
          initialDelaySeconds: 30
          timeoutSeconds: 30
      tolerations:
      - key: "CriticalAddonsOnly"
        operator: "Exists"


----------


kubectl create -f dashboard.yaml


----------
apiVersion: v1
kind: Service
metadata:
  name: kubernetes-dashboard
  namespace: kube-system
  labels:
    k8s-app: kubernetes-dashboard
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
spec:
  selector:
    k8s-app: kubernetes-dashboard
  type: NodePort
  ports:
  - port: 9090
    targetPort: 9090
    nodePort: 8601


kubectl create -f dashboard-svc.yaml

8.3 布署coredns

#镜相下载地址: registry.docker-cn.com/coredns/coredns:0.9.10
apiVersion: v1
kind: ServiceAccount
metadata:
  name: coredns
  namespace: kube-system
  labels:
      kubernetes.io/cluster-service: "true"
      addonmanager.kubernetes.io/mode: Reconcile
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  labels:
    kubernetes.io/bootstrapping: rbac-defaults
    addonmanager.kubernetes.io/mode: Reconcile
  name: system:coredns
rules:
- apiGroups:
  - ""
  resources:
  - endpoints
  - services
  - pods
  - namespaces
  verbs:
  - list
  - watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  annotations:
    rbac.authorization.kubernetes.io/autoupdate: "true"
  labels:
    kubernetes.io/bootstrapping: rbac-defaults
    addonmanager.kubernetes.io/mode: EnsureExists
  name: system:coredns
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:coredns
subjects:
- kind: ServiceAccount
  name: coredns
  namespace: kube-system
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: coredns
  namespace: kube-system
  labels:
      addonmanager.kubernetes.io/mode: EnsureExists
data:
  Corefile: |
    .:53 {
        errors
        log stdout
        health
        kubernetes cluster.local 172.21.0.0/16
        prometheus
        proxy . /etc/resolv.conf
        cache 30
    }
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: coredns
  namespace: kube-system
  labels:
    k8s-app: coredns
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
    kubernetes.io/name: "CoreDNS"
spec:
  replicas: 1
  selector:
    matchLabels:
      k8s-app: coredns
  template:
    metadata:
      labels:
        k8s-app: coredns
    spec:
      serviceAccountName: coredns
      tolerations:
        - key: node-role.kubernetes.io/master
          effect: NoSchedule
        - key: "CriticalAddonsOnly"
          operator: "Exists"
      containers:
      - name: coredns
        image: k8s-registry.local/public/coredns:0.9.10
        imagePullPolicy: IfNotPresent
        resources:
          limits:
            memory: 170Mi
          requests:
            cpu: 100m
            memory: 70Mi
        args: [ "-conf", "/etc/coredns/Corefile" ]
        volumeMounts:
        - name: config-volume
          mountPath: /etc/coredns
        ports:
        - containerPort: 53
          name: dns
          protocol: UDP
        - containerPort: 53
          name: dns-tcp
          protocol: TCP
        - containerPort: 9153
          name: metrics
          protocol: TCP
        livenessProbe:
          httpGet:
            path: /health
            port: 8080
            scheme: HTTP
          initialDelaySeconds: 60
          timeoutSeconds: 5
          successThreshold: 1
          failureThreshold: 5
      dnsPolicy: Default
      volumes:
        - name: config-volume
          configMap:
            name: coredns
            items:
            - key: Corefile
              path: Corefile
---
apiVersion: v1
kind: Service
metadata:
  name: coredns
  namespace: kube-system
  labels:
    k8s-app: coredns
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
    kubernetes.io/name: "CoreDNS"
spec:
  selector:
    k8s-app: coredns
  clusterIP: 172.21.0.2
  ports:
  - name: dns
    port: 53
    protocol: UDP
  - name: dns-tcp
    port: 53
    protocol: TCP
  - name: metrics
    port: 9153
    protocol: TCP


----------
kubectl create -f coredns.yaml

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转载请注明原文链接:Kubernetes1.9 二进制版集群+ipvs+coredns
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