kubernetes系列（一）安装和配置
谈到kubernetes（或者说k8s）不得不提到云计算、虚拟化以及容器技术，相关介绍网上一大堆，不再赘述。而kubernetes的出现就是为了高效的管理云端运行的docker容器。环境
docker 1.30----------docker的安装请参考官方文档
golang 1.8.3 ----------自行百度
etcd 3.2.5 --------------安装文档参考官方文档
kubernetes 1.6.8 ---稍后介绍
部署方案
master+etcd 10.0.45.44
node1
10.0.48.50
node2
10.0.48.59
安装和配置
从github.com/kubernetes/kubernetes上下载1.6.8已编译好的二进制文件
tar xzvf kubernetes.tar.gz
cd kubernetes
./cluster/get-kube-binaries.sh
执行该shell会自动下载kube的server和client可执行文件，其中客户端文件会自动安装在kubernetes目录下的client文件夹下，服务端文件会安装在kubernetes/server/kubernetes/server/bin/下面（包含客户端文件)
master节点需要：kube-apiserver, kube-controller-manager, kube-scheduler
node节点需要：kubelet和kube-proxy
这些程序我们通过systemctl的方式来进行管理（包括etcd）
1、master配置
kube-etcd.service
Description
=Kube-etcd Service
After
=network.target
Type
=notify
ExecStart
=/usr/local/bin/etcd \
--name "etcd1" \
--data-dir="~/.k8s/etcd" \
--listen-client-urls="http://10.0.45.44:2379,http://127.0.0.1:2379" \
--listen-peer-urls="http://10.0.45.44:2380" \
--advertise-client-urls="http://10.0.45.44:2379" \
--initial-advertise-peer-urls="http://10.0.45.44:2380" \
--initial-cluster="etcd1=http://10.0.45.44:2380" \
--initial-cluster-state="new"
Restart
=always
LimitNOFILE
=65536
WantedBy
=default.target
kube-apiserver.service
Description
=Kube-apiserver Service
After
=network.target
Type
=notify
ExecStart
=/usr/local/bin/kube-apiserver \
--admission-control=NamespaceAutoProvision,LimitRanger,SecurityContextDeny \
--apiserver-count=1 \
--cors-allowed-origins=.* \
--enable-garbage-collector=false \
--etcd-servers=http://10.0.45.44:2379 \
--insecure-bind-address=0.0.0.0 \
--insecure-port=8080 \
--log-dir=~/.kube/log/kube-apiserver \
--logtostderr=false \
--service-cluster-ip-range=10.0.0.0/16 \
--v=5 \
Restart=always
LimitNOFILE=65536
WantedBy=default.target
kube-controller-manager.service
Description
=Kube-controller-manager Service
After
=network.target
Type
=simple
ExecStart
=/usr/local/bin/kube-controller-manager \
--enable-garbage-collector=false \
--logtostderr=false \
--log-dir=~/.kube/log/kube-controller-manager \
--pod-eviction-timeout=5m0s \
--master=http://0.0.0.0:8080 \
--node-monitor-grace-period=40s \
--terminated-pod-gc-threshold=12500 \
--leader-elect=true \
--v=4 \
Restart=always
LimitNOFILE=65536
WantedBy=default.target
kube-scheduler.service
Description
=Kube-scheduler Service
After
=network.target
Type
=simple
ExecStart
=/usr/local/bin/kube-scheduler \
--log-dir=~/.k8s/log/kube-scheduler \
--logtostderr=false \
--master=http://0.0.0.0:8080 \
--leader-elect=true \
--v=5 \
Restart=always
LimitNOFILE=65536
WantedBy=default.target
注意修改自己的IP地址，下面启动服务……
//add to path cd etcd-v3.2.5-linux-amd64; sudo cp -rf etcd /usr/local/bin
cd kubernetes/server/kubernetes/server/bin/; sudo cp -rf kube-apiserver kube-controller-manager kube-scheduler kubectl /usr/local/bin
sudo
cp -rf kube-etcd.service kube-apiserver.service kube-controller-manager.service kube-scheduler.service /lib/systemd/system/ //start server
sudo -i systemctl --system daemon-reload
systemctl start kube-apiserver.service
systemctl start kube-controller-manager.service
systemctl start kube-scheduler.service
2. node1
kubelet.service
Description
=Kubelet Service
After
=network.target
Type
=simple
ExecStart
=/usr/local/bin/kubelet \
--api-servers=http://10.0.45.44:8080 \
--hostname-override=10.0.48.50 \
--image-gc-high-threshold=80 \
--image-gc-low-threshold=50 \
--log-dir=~/.k8s/log/kubelet \
--logtostderr=false \
--pod-infra-container-image=docker.cloudin.com/google_containers/pause-amd64:3.0 \
--system-reserved cpu=2000m,memory=4G \
--v=5 \
Restart=always
LimitNOFILE=65536
WantedBy=default.target
kube-proxy.service
Description
=Kube-proxy Service
After
=network.target
Type
=simple
ExecStart
=/usr/local/bin/kube-proxy\
--log-dir=~/.k8s/log/kube-proxy \
--logtostderr=false \
--master=http://10.0.48.50:8080 \
--v=5 \
Restart=always
LimitNOFILE=65536
WantedBy=default.target
node 2需要将相应ip地址中的10.0.48.50改为10.0.48.59 下面启动服务……
//add to path cd kubernetes/server/kubernetes/server/bin/; sudo cp -rf kubelet kube-proxy /usr/local/bin
sudo cp -rf kubelet.service kube-proxy.service /lib/systemd/system/
//start sudo -i
systemctl --system daemon-reload
systemctl start kubelet.service
systemctl start kube-proxy.service
3、测试环境是否搭建成功
$kubectl get nodes
NAME STATUS AGE VERSION
10.0.48.50 NotReady 1h v1.6.8
10.0.48.59 Ready 1h v1.6.8
$kubectl get service
NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes 10.0.0.1 <none> 443/TCP 1h
------------------------------------------THIS IS AN END LINE, HAVE FUN-------------------------------------------------------------
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