Kubernetes安装

Kubernetes安装

 

本文使用vultr虚拟主机实现

邀请注册链接：http://www.vultr.com/?ref=6940267

 

ETCD集群安装：http://crabdave.iteye.com/blog/2365488

配置docker 和 flannel：http://crabdave.iteye.com/blog/2365490

 

download kubernetes

kubernetes v1.3.0 大约1.4G 使用东京的vultr实例下载很快

wget https://github.com/kubernetes/kubernetes/releases/download/v1.3.0/kubernetes.tar.gz

 

tar -xvf kubernetes.tar.gz

 

cd kubernetes/server

 

将kubernetes-server-linux-amd64.tar.gz解压

-rw-r--r-- 1 root root 352M 7月   1 2016 kubernetes-server-linux-amd64.tar.gz

 

 tar -xvf kubernetes-server-linux-amd64.tar.gz

 

cd /root/kubernetes/server/kubernetes/server/bin

find ./ -perm 755 | xargs -i cp {} /usr/bin

 

其它两台机器拷贝kubernetes到本机

scp root@10.99.0.10:/root/kubernetes/server/kubernetes-server-linux-amd64.tar.gz ./

 

tar -xvf kubernetes-server-linux-amd64.tar.gz 

 

cd /root/kubernetes/server/bin

cp kube-proxy /usr/bin

cp kubelet /usr/bin

 

---------------------------------

 

mkdir -p /opt/kubernetes/

 

cat <<EOF >/lib/systemd/system/kube-apiserver.service

[Unit]

Description=kube-apiserver

 

[Service]

EnvironmentFile=/etc/sysconfig/kube-apiserver

ExecStart=/usr/bin/kube-apiserver \$ETCD_SERVERS \\

          \$LOG_DIR \\

          \$SERVICE_CLUSTER_IP_RANGE \\

          \$INSECURE_BIND_ADDRESS \\

          \$INSECURE_PORT \\

          \$BIND_ADDRESS \\

          \$SECURE_PORT \\

          \$AUTHORIZATION_MODE \\

          \$AUTHORIZATION_FILE \\

          \$BASIC_AUTH_FILE \\

          \$KUBE_APISERVER_OPTS

Restart=on-failure

EOF

 

cat /lib/systemd/system/kube-apiserver.service

---------------------------------

cat <<EOF >/etc/sysconfig/kube-apiserver

# configure file for kube-apiserver

 

# --etcd-servers

ETCD_SERVERS='--etcd-servers=http://10.99.0.10:2380,http://10.99.0.11:2380,http://10.99.0.12:2380'

# --log-dir

LOG_DIR='/opt/kubernetes/logs'

# --service-cluster-ip-range

SERVICE_CLUSTER_IP_RANGE='--service-cluster-ip-range=172.16.0.0/16'

# --insecure-bind-address

INSECURE_BIND_ADDRESS='--insecure-bind-address=0.0.0.0'

# --insecure-port

INSECURE_PORT='--insecure-port=8080'

# --bind-address

BIND_ADDRESS='--bind-address=0.0.0.0'

# --secure-port

SECURE_PORT='--secure-port=6443'

# --authorization-mode

AUTHORIZATION_MODE='--authorization-mode=ABAC'

# --authorization-policy-file

AUTHORIZATION_FILE='--authorization-policy-file=/opt/kubernetes/authorization'

# --basic-auth-file

BASIC_AUTH_FILE='--basic-auth-file=/opt/kubernetes/authentication.csv'

# other parameters

KUBE_APISERVER_OPTS=''

EOF

 

cat /etc/sysconfig/kube-apiserver

 

---------------------------------

 

 

echo '{"user": "admin"}'>/opt/kubernetes/authorization 

 

（密码，用户名，用户ID）：

echo "admin,admin,adminID" > /opt/kubernetes/authentication.csv

---------------------------------

启动kube-apiserver

 

systemctl daemon-reload

systemctl start kube-apiserver

systemctl status -l kube-apiserver

curl -L http://10.99.0.10:8080/healthz

 

tail -n 1000 /var/log/messages

 

----------------

 

启动失败，查看日志

tail -n 1000 /var/log/messages

出现异常

/lib/lsb/init-functions no such file or directory

需要安装

yum install -y redhat-lsb

 

还可以通过如下命令查看kube-apiserver是否正常，正常则返回'ok'：

 

curl -L http://10.99.0.10:8080/healthz

 

------------------------------------------------------------------

 

创建、配置和启动kube-controller-manager服务

 

三个组件启动是有顺序，必须等kube-apiserver正常启动之后再启动kube-controller-manager。

 

cat <<EOF >/etc/sysconfig/kube-controller

# configure file for kube-controller-manager

 

# --master

KUBE_MASTER='--master=http://10.99.0.10:8080'

# --log-dir

LOG_DIR='--log-dir=/opt/kubernetes/logs'

# --cloud-provider

CLOUD_PROVIDER='--cloud-provider='

# other parameters

KUBE_CONTROLLER_OPTS=''

EOF

 

cat /etc/sysconfig/kube-controller

 

---------------

cat <<EOF >/lib/systemd/system/kube-controller.service

[Unit]

Description=kube-controller-manager

After=kube-apiserver.service

Wants=kube-apiserver.service

 

[Service]

EnvironmentFile=/etc/sysconfig/kube-controller

ExecStart=/usr/bin/kube-controller-manager \$KUBE_MASTER \\

          \$LOG_DIR \\

          \$CLOUD_PROVIDER \\

          \$KUBE_CONTROLLER_OPTS

Restart=on-failure

EOF

 

cat /lib/systemd/system/kube-controller.service

---------------

启动kube-controller-manager

 

systemctl daemon-reload

systemctl start kube-controller

systemctl status -l kube-controller

------------------------------------------------------------------

 

创建、配置和启动kube-scheduler服务

 

cat <<EOF >/etc/sysconfig/kube-scheduler

# configure file for kube-scheduler

 

# --master

KUBE_MASTER='--master=http://10.99.0.10:8080'

# --log-dir

LOG_DIR='--log-dir=/opt/kubernetes/logs'

# other parameters

KUBE_SCHEDULER_OPTS=''

EOF

 

cat /etc/sysconfig/kube-scheduler

-----------------

cat <<EOF >/lib/systemd/system/kube-scheduler.service

[Unit]

Description=kube-scheduler

After=kube-apiserver.service

Wants=kube-apiserver.service

 

[Service]

EnvironmentFile=/etc/sysconfig/kube-scheduler

ExecStart=/usr/bin/kube-scheduler \$KUBE_MASTER \\

          \$LOG_DIR \\

          \$KUBE_SCHEDULER_OPTS

Restart=on-failure

EOF

 

cat /lib/systemd/system/kube-scheduler.service

------------

 

启动kube-scheduler

 

systemctl daemon-reload

systemctl start kube-scheduler

systemctl status -l kube-scheduler

 

------------------------------------------------------------------

启动k8s-node端，开始配置两台节点机器

mkdir -p  /opt/kubernetes/

 

--------------------------

配置和启动kube-proxy(三台机器，master api server重启一下)

 

cat <<EOF >/etc/sysconfig/kube-proxy

# configure file for kube-proxy

 

# --master

KUBE_MASTER='--master=http://10.99.0.10:8080'

# --proxy-mode

PROXY_MODE='--proxy-mode=iptables'

# --log-dir

LOG_DIR='--log-dir=/opt/kubernetes/logs'

# other parameters

KUBE_PROXY_OPTS=''" > /etc/sysconfig/kube-proxy

EOF

 

cat /etc/sysconfig/kube-proxy

--------------------------

cat <<EOF >/lib/systemd/system/kube-proxy.service

[Unit]

Description=kube-proxy

 

[Service]

EnvironmentFile=/etc/sysconfig/kube-proxy

ExecStart=/usr/bin/kube-proxy \$KUBE_MASTER \\

          \$PROXY_MODE \\

          \$LOG_DIR \\

          \$KUBE_PROXY_OPTS

Restart=on-failure

EOF

 

cat /usr/lib/systemd/system/kube-proxy.service

 

启动kube-proxy

 

systemctl daemon-reload

systemctl start kube-proxy

systemctl status -l kube-proxy

------------------------------------------------------------------

配置和启动kubelet

cat <<EOF >/lib/systemd/system/kubelet.service

[Unit]

Description=kubelet

 

[Service]

EnvironmentFile=/etc/sysconfig/kubelet

ExecStart=/usr/bin/kubelet \$API_SERVERS \\

          \$ADDRESS \\

          \$HOSTNAME_OVERRIDE \\

          \$ALLOW_PRIVILEGED \\

          \$POD_INFRA \\

          \$CLUSTER_DNS \\

          \$CLUSTER_DOMAIN \\

          \$MAX_PODS \\

          \$LOG_DIR \\

          \$KUBELET_OPTS

Restart=on-failure

EOF

 

cat /lib/systemd/system/kubelet.service

-------------------------------

/etc/sysconfig/kubelet配置10.99.0.11机器

cat <<EOF >/etc/sysconfig/kubelet

# configure file for kubelet

 

# --api-servers

API_SERVERS='--api-servers=http://10.99.0.10:8080'

# --address

ADDRESS='--address=0.0.0.0'

# --hostname-override

HOSTNAME_OVERRIDE='vultr.guest-11'

# --allow-privileged

ALLOW_PRIVILEGED='--allow-privileged=false'

# --pod-infra-container-image

#POD_INFRA='--pod-infra-container-image=10.23.23.76:5000/kubernetes/pause:latest'

# --cluster-dns

#CLUSTER_DNS='--cluster-dns=172.16.66.66'

# --cluster-domain

#CLUSTER_DOMAIN='--cluster-domain=cluster.local'

# --max-pods

MAX_PODS='--max-pods=70'

# --log-dir

LOG_DIR='--log-dir=/opt/kubernetes/logs'

# other parameters

KUBELET_OPTS=''

EOF

 

cat /etc/sysconfig/kubelet

 

--------------

/etc/sysconfig/kubelet配置10.99.0.12机器

cat <<EOF >/etc/sysconfig/kubelet

echo "# configure file for kubelet

 

# --api-servers

API_SERVERS='--api-servers=http://10.99.0.10:8080'

# --address

ADDRESS='--address=0.0.0.0'

# --hostname-override

HOSTNAME_OVERRIDE='vultr.guest-12'

# --allow-privileged

ALLOW_PRIVILEGED='--allow-privileged=false'

# --pod-infra-container-image

#POD_INFRA='--pod-infra-container-image=10.23.150.76:5000/kubernetes/pause:latest'

# --cluster-dns

#CLUSTER_DNS='--cluster-dns=172.16.66.66'

# --cluster-domain

#CLUSTER_DOMAIN='--cluster-domain=cluster.local'

# --max-pods

MAX_PODS='--max-pods=70'

# --log-dir

LOG_DIR='--log-dir=/opt/kubernetes/logs'

# other parameters

KUBELET_OPTS=''

EOF

 

cat /etc/sysconfig/kubelet

 

--------------

 

 

启动kubelet

 

systemctl daemon-reload

systemctl start kubelet

systemctl status -l kubelet

------------------------------------------------------------------

回到master机器 10.99.0.10

 

kubectl --server=10.99.0.10:8080 get nodes

 

NAME             STATUS    AGE

vultr.guest-11   Ready     6m

vultr.guest-12   Ready     7m

------------------------------------------------------------------

 

mkdir -p ~/workspace

cd ~/workspace

 

echo "  apiVersion: v1

  kind: ReplicationController

  metadata:

      name: test-1

  spec:

    replicas: 1

    template:

      metadata:

        labels:

          app: test-1

      spec:

        containers:

          - name: nginx-1

            image: docker.io/nginx

        nodeSelector:

          kubernetes.io/hostname: vultr.guest-11" > test-1.yaml

cat test-1.yaml

  

echo "  apiVersion: v1

  kind: ReplicationController

  metadata:

      name: test-2

  spec:

    replicas: 1

    template:

      metadata:

        labels:

          app: test-2

      spec:

        containers:

          - name: nginx-2

            image: docker.io/nginx

        nodeSelector:

          kubernetes.io/hostname: vultr.guest-11" > test-2.yaml

cat test-2.yaml

          

echo "  apiVersion: v1

  kind: ReplicationController

  metadata:

      name: test-3

  spec:

    replicas: 1

    template:

      metadata:

        labels:

          app: test-3

      spec:

        containers:

          - name: nginx-3

            image: docker.io/nginx

        nodeSelector:

          kubernetes.io/hostname: vultr.guest-12" > test-3.yaml

cat test-3.yaml

  

echo "  apiVersion: v1

  kind: ReplicationController

  metadata:

      name: test-4

  spec:

    replicas: 1

    template:

      metadata:

        labels:

          app: test-4

      spec:

        containers:

          - name: nginx-4

            image: docker.io/nginx

        nodeSelector:

          kubernetes.io/hostname: vultr.guest-12" > test-4.yaml

cat test-4.yaml

------------------------------------------------------------------

 

kubectl --server=10.99.0.10:8080 create -f test-1.yaml  

kubectl --server=10.99.0.10:8080 create -f test-2.yaml 

kubectl --server=10.99.0.10:8080 create -f test-3.yaml 

kubectl --server=10.99.0.10:8080 create -f test-4.yaml 

 

kubectl --server=10.99.0.10:8080 get pods

 

NAME           READY     STATUS    RESTARTS   AGE

test-1-p4te6   1/1       Running   0          35s

test-2-7lvz6   1/1       Running   0          34s

test-3-21o5n   1/1       Running   0          34s

test-4-tfkkz   1/1       Running   0          34s

 

查看IP地址及其它相关信息

kubectl --server=10.99.0.10:8080 describe pod test-1-p4te6

kubectl --server=10.99.0.10:8080 describe pod test-2-7lvz6

kubectl --server=10.99.0.10:8080 describe pod test-3-21o5n

kubectl --server=10.99.0.10:8080 describe pod test-4-tfkkz

 

 

------------------------------------------------------------------