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k8s1.4.3安装实践记录(2)-k8s安装

时间:2016-11-01 18:39:56      阅读:964      评论:0      收藏:0      [点我收藏+]

标签:ide   mode   map   centos   cluster   警告   extra   下载   sys   

前面一篇已经安装好了ETCD、docker与flannel(k8s1.4.3安装实践记录(1)),现在可以开始安装k8s了

1、K8S

目前centos yum上的kubernetes还是1.2.0,因此我们只能是使用下载的安装包,进行kubernetes的安装

[root@bogon system]# yum list |grep kubernetes
cockpit-kubernetes.x86_64                  0.114-2.el7.centos          extras   
kubernetes.x86_64                          1.2.0-0.13.gitec7364b.el7   extras   
kubernetes-client.x86_64                   1.2.0-0.13.gitec7364b.el7   extras   
kubernetes-cni.x86_64                      0.3.0.1-0.07a8a2            kubelet  
kubernetes-master.x86_64                   1.2.0-0.13.gitec7364b.el7   extras   
kubernetes-node.x86_64                     1.2.0-0.13.gitec7364b.el7   extras   
kubernetes-unit-test.x86_64                1.2.0-0.13.gitec7364b.el7   extras 

1.1 K8S下载

  使用wget 或者下载软件下载k8s安装包:https://github.com/kubernetes/kubernetes/releases/download/v1.4.3/kubernetes.tar.gz,下载完成,我们会拿到当前1.4.3版本的安装文件。

  

1.2 解压并安装

  解压安装包,并将执行文件存放到合适的地方

tar -zxvf kubernetes.tar.gz
cd kubernetes/server/bin
mkidr /usr/local/kube
cp -R * /usr/local/kube

  设置环境变量文件/etc/profile,将kube执行文件加入的环境变量中

export KUBE_PATH=/usr/local/kube
export PATH=$PATH:$KUBE_PATH

  执行环境变量,使其生效:

source /etc/profile

 

1.3 启动主节点

  当前主节点为192.168.37.130,需要在主节点上执行kube-apiserver ,kube-controller-manager,kube-scheduler三个进程。

1.3.1 开放端口

  如果没有关闭防火墙且使用的是firewalld,则需要开放相关的端口

firewall-cmd --zone=public --add-port=8080/tcp --permanent
firewall-cmd --zone=public --add-port=10250/tcp --permanent
firewall-cmd --zone=public --add-port=6443/tcp --permanent
firewall-cmd --zone=public --add-port=15441/tcp --permanent
firewall-cmd --reload
firewall-cmd --list-all

 

1.3.2 启动kube-apiserver

kube-apiserver   --insecure-bind-address=192.168.37.130    --insecure-port=8080   --service-cluster-ip-range=192.168.37.130/24   --log_dir=/usr/local/kubernete_test/logs/kube   --v=0   --logtostderr=false   --etcd_servers=http://192.168.37.130:2379,http://192.168.37.131:2379   --allow_privileged=false 

 

1.3.3 启动 kube-controller-manager

kube-controller-manager   --v=0  --logtostderr=true  --log_dir=/data/kubernets/logs/kube-controller-manager/  --master=http://192.168.37.130:8080 

1.3.4 启动kube-scheduler

kube-scheduler   --master=192.168.37.130:8080  --v=0   --log_dir=/data/kubernets/logs/kube-scheduler  

1.3.5 查看是否启动完成

[root@bogon ~]# kubectl get componentstatuses
NAME                 STATUS    MESSAGE              ERROR
scheduler            Healthy   ok                   
controller-manager   Healthy   ok                   
etcd-0               Healthy   {"health": "true"}   
etcd-1               Healthy   {"health": "true"} 

可以看到两个etcd启动完成

1.3.6 设置service

  在/usr/lib/systemd/system文件夹中创建各个进程的service文件

  1、kube-apiserver.service

[Unit]
Description=kube-apiserver
Documentation=http://kubernetes.io/docs/

[Service]
EnvironmentFile=-/etc/sysconfig/kubernets/kube-apiserver
ExecStart=/usr/local/kube/kube-apiserver ${INSECURE_BIND_ADDRESS}  ${INSECURE_PORT}  ${SERVICE_CLUSTER_IP_RANGE}  ${LOG_DIR}  ${VERSION}  ${LOGTOSTDERR}  ${ETCD_SERVERS}  ${ALLOW_PRIVILEGED}   
KillMode=process
Restart=on-failure
RestartSec=42s

[Install]
WantedBy=multi-user.target

其对应的配置文件/etc/sysconfig/kubernets/kube-apiserver如下:

INSECURE_BIND_ADDRESS="--insecure-bind-address=192.168.37.130"
INSECURE_PORT="--insecure-port=8080"
SERVICE_CLUSTER_IP_RANGE="--service-cluster-ip-range=192.168.37.130/24"
LOG_DIR="--log_dir=/usr/local/kubernete_test/logs/kube"
VERSION="--v=0"
LOGTOSTDERR="--logtostderr=false"
ETCD_SERVERS="--etcd_servers=http://192.168.37.130:2379,http://192.168.37.131:2379"
ALLOW_PRIVILEGED="--allow_privileged=false"

注意:配置文件中的参数名不能使用“-”

  2、kube-controller-manager

  配置kube-controller-manager.service

 

[Unit]
Description=kube-controller-manager
Documentation=http://kubernetes.io/docs/

[Service]
EnvironmentFile=-/etc/sysconfig/kubernets/kube-controller-manager
ExecStart=/usr/local/kube/kube-controller-manager ${VERSION} ${LOGTOSTDERR} ${LOG_DIR} ${MASTER}     
KillMode=process
Restart=on-failure
RestartSec=42s

[Install]
WantedBy=multi-user.target

  设置/etc/sysconfig/kubernets/kube-controller-manager

VERSION="--v=0"
LOGTOSTDERR="--logtostderr=true" 
LOG_DIR="--log_dir=/data/kubernets/logs/kube-controller-manager/"
MASTER="--master=http://192.168.37.130:8080"

  3、设置kube-scheduler服务

  kube-scheduler.service

[Unit]
Description=kube-scheduler
Documentation=http://kubernetes.io/docs/

[Service]
EnvironmentFile=-/etc/sysconfig/kubernets/kube-scheduler
ExecStart=/usr/local/kube/kube-scheduler ${VERSION} ${LOGTOSTDERR} ${LOG_DIR} ${MASTER}     
KillMode=process
Restart=on-failure
RestartSec=42s

[Install]
WantedBy=multi-user.target

  配置文件如下

VERSION="--v=0"
LOGTOSTDERR="--logtostderr=true" 
LOG_DIR="--log_dir=/data/kubernets/logs/kube-scheduler"
MASTER="--master=http://192.168.37.130:8080

  4、重启各个服务  

systemctl daemon-reload
systemctl  start kube-apiserver
systemctl  start kube-controller-manager
systemctl  start kube-scheduler

 

1.4 启动minion

  Minion需要启动kube-proxy,kubelet两个进程

1.4.1 kube-proxy启动  

#在两台机器都执行
kube-proxy  --logtostderr=true --v=0 --master=http://192.168.37.130:8080  

 

 

1.4.1 kubelet启动

kubelet  --logtostderr=true --v=0 --allow-privileged=false  --log_dir=/data/kubernets/logs/kubelet  --address=0.0.0.0  --port=10250  --hostname_override=192.168.37.130  --api_servers=http://192.168.37.130:8080  

1.4.5配置service

1、kube-proxy.service

[Unit]
Description=kube-proxy
Documentation=http://kubernetes.io/docs/

[Service]
EnvironmentFile=-/etc/sysconfig/kubernets/kube-proxy
ExecStart=/usr/local/kube/kube-proxy ${VERSION} ${LOGTOSTDERR} ${LOG_DIR} ${MASTER}     
KillMode=process
Restart=on-failure
RestartSec=42s

[Install]
WantedBy=multi-user.target
/etc/sysconfig/kubernets/kube-proxy

VERSION="--v=0"
LOGTOSTDERR="--logtostderr=true" 
LOG_DIR="--log_dir=/data/kubernets/logs/kube-controller-manager/"
MASTER="--master=http://192.168.37.130:8080"

 

2、kubelet.service

[Unit]
Description=kubelet
Documentation=http://kubernetes.io/docs/

[Service]
EnvironmentFile=-/etc/sysconfig/kubernets/kubelet
ExecStart=/usr/local/kube/kubelet ${LOGTOSTDERR}  ${VERSION}  ${ALLOW_PRIVILEGED}  ${LOG_DIR}  ${ADDRESS}  ${PORT}  ${HOSTNAME_OVERRIDE}  ${API_SERVERS}     
KillMode=process
Restart=on-failure
RestartSec=42s

[Install]
WantedBy=multi-user.target
/etc/sysconfig/kubernets/kubelet配置文件
LOGTOSTDERR="--logtostderr=true"
VERSION="--v=0"
ALLOW_PRIVILEGED="--allow-privileged=false"
LOG_DIR="--log_dir=/data/kubernets/logs/kubelet"
ADDRESS="--address=0.0.0.0"
PORT="--port=10250"
HOSTNAME_OVERRIDE="--hostname_override=192.168.37.131"
API_SERVERS="--api_servers=http://192.168.37.130:8080"

 

 

 经过如上的步骤,k8s基本上已经安装好了,后续在把dashboard给安装上。

问题:

1、采用网上的配置,执行会产生一些警告信息:

[root@bogon server]# kube-apiserver   --address=192.168.37.130    --insecure-port=8080   --service-cluster-ip-range=192.168.37.130/24   --log_dir=/usr/local/kubernete_test/logs/kube   --kubelet_port=10250   --v=0   --logtostderr=false   --etcd_servers=http://192.168.37.130:2379,http://192.168.37.131:2379   --allow_privileged=false 
Flag --address has been deprecated, see --insecure-bind-address instead.
Flag --kubelet-port has been deprecated, kubelet-port is deprecated and will be removed.
[restful] 2016/11/01 15:31:15 log.go:30: [restful/swagger] listing is available at https://192.168.37.130:6443/swaggerapi/
[restful] 2016/11/01 15:31:15 log.go:30: [restful/swagger] https://192.168.37.130:6443/swaggerui/ is mapped to folder /swagger-ui/

 

2、执行kubectl get componentstatuses报错

[root@bogon ~]# kubectl get componentstatuses
The connection to the server localhost:8080 was refused - did you specify the right host or port?

  如上问题,如果在master机器上执行,则是因为/etc/hosts文件没有配置导致,在文件中加入ip localhost条目即可。

  如果是在从节点上,在执行kubectl get componentstatuses语句时候,加上kubectl -s $masterIP:$port get componentstatuses,其中$masterIP为主节点IP,$port为主节点的服务IP,即安装文档中的8080端口,如:kubectl -s http://192.168.37.130:8080 get componentstatuses

 

k8s1.4.3安装实践记录(2)-k8s安装

标签:ide   mode   map   centos   cluster   警告   extra   下载   sys   

原文地址:http://www.cnblogs.com/lyzw/p/6020211.html

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