Ubuntu16.04多主机集群上手动部署Kubernetes，配置docker私有registry，配置Kubernetes-dashboard WEB ui

2017年03月17日 20:51:42 阅读数：3475 标签： kubernetesdashboardk8setcd集群docker更多

个人分类： kubernetesdocker

Ubuntu16.04多主机集群上手动部署Kubernetes，配置docker私有registry，配置Kubernetes-dashboard WEB ui

主要流程：
- 部署etcd集群
- 部署K8s Master
- 配置flannel服务
- 部署K8s Node
- 部署DNS
- 部署Dashboard

环境信息

项目	版本
Etcd	3.1.2
docker	17.03.0-ce
flannel	v0.7.0
Kubernetes	v1.4.9

集群主机ip：

名称	ip	os
master	10.107.20.5	Ubuntu 16.04.2 LTS
node1	10.107.20.6	Ubuntu 16.04.2 LTS
node2	10.107.20.7	Ubuntu 16.04.2 LTS
node3	10.107.20.8	Ubuntu 16.04.2 LTS
node4	10.107.20.9	Ubuntu 16.04.2 LTS

每台主机上安装最新版Docker Engine,手工安装可参考博主其他博客。

部署etcd集群

我们将在5台主机上安装部署etcd集群

下载etcd

在部署机上下载etcd

ETCD_VERSION=${ETCD_VERSION:-"3.1.2"}
ETCD="etcd-v${ETCD_VERSION}-linux-amd64"
curl -L https://github.com/coreos/etcd/releases/download/v${ETCD_VERSION}/${ETCD}.tar.gz -o etcd.tar.gztar xzf etcd.tar.gz -C /tmp
cd /tmp/etcd-v${ETCD_VERSION}-linux-amd64for h in master node1 node2 node3 node4; do ssh user@$h mkdir -p '$HOME/kube' && scp -r etcd* user@$h:~/kube; done
for h in master node1 node2 node3 node4; do ssh user@$h 'sudo mkdir -p /opt/bin && sudo mv $HOME/kube/* /opt/bin && rm -rf $home/kube/*'; done

可以手动到github上下载etcd release （https://github.com/coreos/etcd/releases/）的.tar.gz包，解压。通过scp复制到 etcd 和etcdctl到各个主机（每台主机需要配置ssh，可参考博主其他博客）。然后复制到/opt/bin目录下。

配置etcd服务

在每台主机上，分别创建/opt/config/etcd.conf和/lib/systemd/system/etcd.service文件，（注意修改IP地址，和主机名）
/opt/config/etcd.conf

sudo mkdir -p /var/lib/etcd/
sudo mkdir -p /opt/config/
sudo  cat <<EOF |  sudo tee /opt/config/etcd.conf
ETCD_DATA_DIR=/var/lib/etcd
ETCD_NAME=etcd5
ETCD_INITIAL_CLUSTER=etcd5=http://10.107.20.5:2380,etcd6=http://10.107.20.6:2380,etcd7=http://10.107.20.7:2380,etcd8=http://10.107.20.8:2380,etcd9=http://10.107.20.9:2380
ETCD_INITIAL_CLUSTER_STATE=new
ETCD_LISTEN_PEER_URLS=http://10.107.20.5:2380
ETCD_INITIAL_ADVERTISE_PEER_URLS=http://10.107.20.5:2380
ETCD_ADVERTISE_CLIENT_URLS=http://10.107.20.5:2379
ETCD_LISTEN_CLIENT_URLS=http://10.107.20.5:2379,http://127.0.0.1:2379
GOMAXPROCS=$(nproc)
EOF

此处五台主机的ETCD_NAME为etcd 5-9，可修改ETCD_NAME为自己起得名字（相应的ETCD_INITIAL_CLUSTER中对应五个名字）。每台主机上修改ETCD_LISTEN_PEER_URLS、ETCD_INITIAL_ADVERTISE_PEER_URLS、ETCD_ADVERTISE_CLIENT_URLS、ETCD_LISTEN_CLIENT_URLS为本机的ip。

/lib/systemd/system/etcd.service

[Unit]
Description=Etcd Server
Documentation=https://github.com/coreos/etcd
After=network.target[Service]
User=root
Type=simple
EnvironmentFile=-/opt/config/etcd.conf
ExecStart=/opt/bin/etcd
Restart=on-failure
RestartSec=10s
LimitNOFILE=40000[Install]
WantedBy=multi-user.target

然后在每台主机上运行如下命令，将etcd加入开机服务并启动

sudo systemctl daemon-reload
sudo systemctl enable etcd
sudo systemctl start etcd

部署K8s Master

下载Flannel

FLANNEL_VERSION=${FLANNEL_VERSION:-"v0.7.0"}
curl -L https://github.com/coreos/flannel/releases/download/v${FLANNEL_VERSION}/flannel-${FLANNEL_VERSION}-linux-amd64.tar.gz flannel.tar.gz
tar xzf  flannel.tar.gz -C /tmp

如etcd一般，可手动到github上下载，解压。

下载K8s release包，并解压（https://github.com/kubernetes/kubernetes/releases）

复制程序文件

cd /tmp
scp kubernetes/server/bin/kube-apiserver \kubernetes/server/bin/kube-controller-manager \kubernetes/server/bin/kube-scheduler kubernetes/server/bin/kubelet kubernetes/server/bin/kube-proxy user@10.107.20.5:~/kube
scp flannel-${FLANNEL_VERSION}/flanneld user@10.107.20.5:~/kube
ssh -t user@10.107.20.5 'sudo mv ~/kube/* /opt/bin/'

将kube-apiserver、kube-controller-manager、kube-scheduler、kube-proxy、flanneld复制到master主机。

创建证书

在master主机上，运行如下命令创建证书

mkdir -p /srv/kubernetes/cd /srv/kubernetesexport MASTER_IP=10.107.20.5
openssl genrsa -out ca.key 2048
openssl req -x509 -new -nodes -key ca.key -subj "/CN=${MASTER_IP}" -days 10000 -out ca.crt
openssl genrsa -out server.key 2048
openssl req -new -key server.key -subj "/CN=${MASTER_IP}" -out server.csr
openssl x509 -req -in server.csr -CA ca.crt -CAkey ca.key -CAcreateserial -out server.crt -days 10000

配置kube-apiserver服务

我们使用如下的Service以及Flannel的网段：

SERVICE_CLUSTER_IP_RANGE=172.18.0.0/16

FLANNEL_NET=192.168.0.0/16

在master主机上，创建/lib/systemd/system/kube-apiserver.service文件，内容如下

[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target[Service]
User=root
ExecStart=/opt/bin/kube-apiserver \--insecure-bind-address=0.0.0.0 \--insecure-port=8080 \--etcd-servers=http://10.107.20.5:2379, http://10.107.20.6:2379, http://10.107.20.7:2379, http://10.107.200
.8:2379, http://10.107.20.9:2379 \--logtostderr=true \--allow-privileged=false \--service-cluster-ip-range=172.18.0.0/16 \--admission-control=NamespaceLifecycle,LimitRanger,ServiceAccount,SecurityContextDeny,ResourceQuota \--service-node-port-range=30000-32767 \--advertise-address=10.107.20.5 \--client-ca-file=/srv/kubernetes/ca.crt \--tls-cert-file=/srv/kubernetes/server.crt \--tls-private-key-file=/srv/kubernetes/server.key
Restart=on-failure
Type=notify
LimitNOFILE=65536[Install]
WantedBy=multi-user.target

–etcd_servers:指定etcd服务的URL;–insecure-bind-address:绑定主机的非安全地址，设置0.0.0.0表示绑定所有ip地址;–insecure-port:apiserver绑定主机的非安全端口号，默认为8080;–service-cluster-ip-range:Kubernetes集群中Service的虚拟ip地址范围，以CIDR格式表示，该ip范围不能与物理机的真实ip段有重合。

配置kube-controller-manager服务

在master主机上，创建/lib/systemd/system/kube-controller-manager.service文件，内容如下

[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes[Service]
User=root
ExecStart=/opt/bin/kube-controller-manager \--master=127.0.0.1:8080 \--root-ca-file=/srv/kubernetes/ca.crt \--service-account-private-key-file=/srv/kubernetes/server.key \--logtostderr=true
Restart=on-failure
LimitNOFILE=65536[Install]
WantedBy=multi-user.target

配置kuber-scheduler服务

在master主机上，创建/lib/systemd/system/kube-scheduler.service文件，内容如下

[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes[Service]
User=root
ExecStart=/opt/bin/kube-scheduler \--logtostderr=true \--master=127.0.0.1:8080
Restart=on-failure
LimitNOFILE=65536[Install]
WantedBy=multi-user.target

在master主机上，创建/lib/systemd/system/flanneld.service文件，内容如下

配置flanneld服务

[Unit]
Description=Flanneld
Documentation=https://github.com/coreos/flannel
After=network.target
Before=docker.service[Service]
User=root
ExecStart=/opt/bin/flanneld \--etcd-endpoints="http://10.107.20.5:2379" \--iface=10.107.20.5 \--ip-masq
Restart=on-failure
Type=notify
LimitNOFILE=65536

启动服务

/opt/bin/etcdctl --endpoints="http://10.107.20.5:2379,http://10.107.20.6:2379,http://10.107.20.7:2379,http://10.107.20.8:2379,http://10.107.20.9:2379" mk /coreos.com/network/config '{"Network":"192.168.0.0/16", "Backend": {"Type": "vxlan"}}'sudo systemctl daemon-reloadsudo systemctl enable kube-apiserver
sudo systemctl enable kube-controller-manager
sudo systemctl enable kube-scheduler
sudo systemctl enable flanneldsudo systemctl start kube-apiserver
sudo systemctl start kube-controller-manager
sudo systemctl start kube-scheduler
sudo systemctl start flanneld

修改Docker服务

source /run/flannel/subnet.envsudo sed -i "s|^ExecStart=/usr/bin/dockerd -H fd://$|ExecStart=/usr/bin/dockerd -H tcp://127.0.0.1:4243 -H unix:///var/run/docker.sock --bip=${FLANNEL_SUBNET} --mtu=${FLANNEL_MTU}|g" /lib/systemd/system/docker.service
rc=0
ip link show docker0 >/dev/null 2>&1 || rc="$?"
if [[ "$rc" -eq "0" ]]; then
ip link set dev docker0 down
ip link delete docker0
fisudo systemctl daemon-reload
sudo systemctl enable docker
sudo systemctl restart docker

如果是手动安装的docker则需要去github上下载，docker.service和docker.socket文件到/lib/systemd/system/目录

部署K8s Node

复制程序文件

cd /tmp
for h in master node1 node2 node3 node4; do scp kubernetes/server/bin/kubelet kubernetes/server/bin/kube-proxy user@$h:~/kube; done
for h in master node1 node2 node3 node4; do scp flannel-${FLANNEL_VERSION}/flanneld user@$h:~/kube;done
for h in master node1 node2 node3 node4; do ssh -t user@$h 'sudo mkdir -p /opt/bin && sudo mv ~/kube/* /opt/bin/'; done

复制kube-proxy、kubelet到各节点。

配置Flanned以及修改Docker服务

参见Master部分相关步骤：配置Flanneld服务，启动Flanneld服务，修改Docker服务。注意修改iface的地址

配置kubelet服务(在master上也配置kubelet和kube-proxy)

/lib/systemd/system/kubelet.service，注意修改–hostname-override的IP地址，改为各主机的ip

[Unit]
Description=Kubernetes Kubelet
After=docker.service
Requires=docker.service[Service]
ExecStart=/opt/bin/kubelet \--hostname-override=10.107.20.5 \--api-servers=http://10.107.20.5:8080 \--logtostderr=true
Restart=on-failure
KillMode=process[Install]
WantedBy=multi-user.target

启动服务

sudo systemctl daemon-reload
sudo systemctl enable kubelet
sudo systemctl start kubelet

配置kube-proxy服务

/lib/systemd/system/kube-proxy.service，注意修改IP地址

[Unit]
Description=Kubernetes Proxy
After=network.target[Service]
ExecStart=/opt/bin/kube-proxy  \--hostname-override=10.107.20.5 \--master=http://10.107.20.5:8080 \--logtostderr=true
Restart=on-failure[Install]
WantedBy=multi-user.target

启动服务

sudo systemctl daemon-reload
sudo systemctl enable kube-proxy
sudo systemctl start kube-proxy

部署DNS

我们设置DNS_SERVER_IP=”172.18.8.8”;DNS_DOMAIN=”cluster.local”;DNS_REPLICAS=1
在master上创建文件， skydns.yml

apiVersion: v1
kind: ReplicationController
metadata:name: kube-dns-v17.1namespace: kube-systemlabels:k8s-app: kube-dnsversion: v17.1kubernetes.io/cluster-service: "true"
spec:replicas: 1selector:k8s-app: kube-dnsversion: v17.1template:metadata:labels:k8s-app: kube-dnsversion: v17.1kubernetes.io/cluster-service: "true"spec:containers:- name: kubednsimage: 10.107.20.5:5000/mritd/kubedns-amd64resources:# TODO: Set memory limits when we've profiled the container for large# clusters, then set request = limit to keep this container in# guaranteed class. Currently, this container falls into the# "burstable" category so the kubelet doesn't backoff from restarting it.limits:cpu: 100mmemory: 170Mirequests:cpu: 100mmemory: 70MilivenessProbe:httpGet:path: /healthzport: 8080scheme: HTTPinitialDelaySeconds: 60timeoutSeconds: 5successThreshold: 1failureThreshold: 5readinessProbe:httpGet:path: /readinessport: 8081scheme: HTTP# we poll on pod startup for the Kubernetes master service and# only setup the /readiness HTTP server once that's available.initialDelaySeconds: 30timeoutSeconds: 5args:# command = "/kube-dns"- --domain=cluster.local- --dns-port=10053- --kube-master-url=http://10.107.20.5:8080ports:- containerPort: 10053name: dns-localprotocol: UDP- containerPort: 10053name: dns-tcp-localprotocol: TCP- name: dnsmasqimage: 10.107.20.5:5000/kube-dnsmasq-amd64args:- --cache-size=1000- --no-resolv- --server=127.0.0.1#10053ports:- containerPort: 53name: dnsprotocol: UDP- containerPort: 53name: dns-tcpprotocol: TCP- name: healthzimage: 10.107.20.5:5000/exechealthz-amd64resources:# keep request = limit to keep this container in guaranteed classlimits:cpu: 10mmemory: 50Mirequests:cpu: 10m# Note that this container shouldn't really need 50Mi of memory. The# limits are set higher than expected pending investigation on #29688.# The extra memory was stolen from the kubedns container to keep the# net memory requested by the pod constant.memory: 50Miargs:- -cmd=nslookup kubernetes.default.svc.cluster.local 127.0.0.1 >/dev/null- -port=8080- -quietports:- containerPort: 8080protocol: TCPdnsPolicy: Default  # Don't use cluster DNS.
---
apiVersion: v1
kind: Service
metadata:name: kube-dnsnamespace: kube-systemlabels:k8s-app: kube-dnskubernetes.io/cluster-service: "true"kubernetes.io/name: "KubeDNS"
spec:selector:k8s-app: kube-dnsclusterIP: 172.18.8.8ports:- name: dnsport: 53protocol: UDP- name: dns-tcpport: 53protocol: TCP

创建pod和服务

kubectl create -f skydns.yml

然后，修该各节点的kubelet.service,添加–cluster-dns=172.18.8.8以及–cluster-domain=cluster.local

此处可能出现问题，kubernetes在创建pod时，还通过启动一个名为google_containers/pause的镜像来实现pod的概念。离线环境需要先下载pause镜像。此处，笔者通过一台嫩够连接上Internet的电脑下载一个docker registry镜像，docker save -o 保存为tar包，拷贝到master主机，docker load 为本地镜像
运行起来构建一个私有registry。从docker hub下载一个mritd/pause-amd64镜像，docker tag打上标签10.107.20.5:5000/mritd/pause-amd64，推到私有registry。
之后，给每台Node的kubelet服务的启动参数加上–pod_infra_container_image参数，指定为私有Docker Registry中的pause镜像的地址。–pod_infra_container_image=10.107.20.5:5000/mritd/pause-amd64.
来另外，kube-dns中庸用到的镜像（kubedns-amd64，kube-dnsmasq-amd64，exechealthz-amd64）也是离线下载推到私有registry中的。需要你自己手动完成这些操作。
对于客户端对于私有docker registry不能拉取推送的问题。到客户端上配置/etc/docker/daemon.json.添加{“insecure-registries”:[“registry的ip:5000”]} 如 {“insecure-registries”:[“10.107.20.5:5000”]}。

部署Dashboard

在master上创建kube-dashboard.yml文件

kind: Deployment
apiVersion: extensions/v1beta1
metadata:labels:app: kubernetes-dashboardname: kubernetes-dashboardnamespace: kube-system
spec:replicas: 1revisionHistoryLimit: 10selector:matchLabels:app: kubernetes-dashboardtemplate:metadata:labels:app: kubernetes-dashboard# Comment the following annotation if Dashboard must not be deployed on masterannotations:scheduler.alpha.kubernetes.io/tolerations: |[{"key": "dedicated","operator": "Equal","value": "master","effect": "NoSchedule"}]spec:containers:- name: kubernetes-dashboardimage: 10.107.20.5:5000/mritd/kubernetes-dashboard-amd64ports:- containerPort: 9090protocol: TCPargs:- --apiserver-host=http://10.107.20.5:8080livenessProbe:httpGet:path: /port: 9090initialDelaySeconds: 30timeoutSeconds: 30
---
kind: Service
apiVersion: v1
metadata:labels:app: kubernetes-dashboardname: kubernetes-dashboardnamespace: kube-system
spec:type: NodePortports:- port: 80targetPort: 9090selector:app: kubernetes-dashboard

kubectl create -f kube-dashboard.yml
参考dns的部署

查看kubectl describe -f kube-dashboard.yml pod被部署到了哪个节点，查看映射的端口。通过访问被部署到的节点的ip和port就可访问ui页面了。

30W年薪的人工智能工程师只是“白菜价”？

机器学习|深度学习|图像处理|自然语言处理|无人驾驶，这些技术都会吗？看看真正的人工智能师都会那些关键技术？年薪比你高多少！

王树民ITDATA：好(08-23 07:45#5楼)

gnoloahs： k8s一键部署视频教程链接:https://pan.baidu.com/s/1c2m565U 密码:c3f4(12-02 12:43#4楼)

Mark-PINE： kube-dns和kubernetes-dashboard推荐用我最新转载的方式部署，国内可以去网易蜂巢下载对应版本的image镜像部署。(04-01 16:52#3楼)

雪之下丶微凉：请教博主子节点是如何注册到集群中的，有类似于join的命令之类的吗？(03-29 22:47#2楼)查看回复(1)

Mark-PINE：对于客户端对于私有docker registry不能拉取推送的问题。到客户端上配置/etc/docker/daemon.json.添加{"insecure-registries":["registry的ip:5000"]} 如 {"insecure-registries":["10.107.20.5:5000"]}。(03-17 20:57#1楼)

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Ubuntu16.04手动部署Kubernetes(1)——Master和Node部署