Centos7部署Kubernetes集群
目录贴:Kubernetes学习系列
1、环境介绍及准备:
1.1 物理机操作系统
物理机操作系统采用Centos7.3 64位,细节如下。
[root@localhost ~]# uname -a
Linux localhost.localdomain 3.10.-514.6..el7.x86_64 # SMP Wed Jan :: UTC x86_64 x86_64 x86_64 GNU/Linux
[root@localhost ~]# cat /etc/redhat-release
CentOS Linux release 7.3. (Core)
1.2 主机信息
本文准备了三台机器用于部署k8s的运行环境,细节如下:
节点及功能 |
主机名 |
IP |
Master、etcd、registry |
K8s-master |
10.0.251.148 |
Node1 |
K8s-node-1 |
10.0.251.153 |
Node2 |
K8s-node-2 |
10.0.251.155 |
设置三台机器的主机名:
Master上执行:
[root@localhost ~]# hostnamectl --static set-hostname k8s-master
Node1上执行:
[root@localhost ~]# hostnamectl --static set-hostname k8s-node-
Node2上执行:
[root@localhost ~]# hostnamectl --static set-hostname k8s-node-
在三台机器上设置hosts,均执行如下命令:
echo '10.0.251.148 k8s-master
10.0.251.148 etcd
10.0.251.148 registry
10.0.251.153 k8s-node-
10.0.251.155 k8s-node-' >> /etc/hosts
1.3 关闭三台机器上的防火墙
systemctl disable firewalld.service
systemctl stop firewalld.service
2、部署etcd
k8s运行依赖etcd,需要先部署etcd,本文采用yum方式安装:
[root@localhost ~]# yum install etcd -y
yum安装的etcd默认配置文件在/etc/etcd/etcd.conf。编辑配置文件,更改以下带颜色部分信息:
[root@localhost ~]# vi /etc/etcd/etcd.conf # [member]
ETCD_NAME=master
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
#ETCD_WAL_DIR=""
#ETCD_SNAPSHOT_COUNT=""
#ETCD_HEARTBEAT_INTERVAL=""
#ETCD_ELECTION_TIMEOUT=""
#ETCD_LISTEN_PEER_URLS="http://0.0.0.0:2380"
ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379,http://0.0.0.0:4001"
#ETCD_MAX_SNAPSHOTS=""
#ETCD_MAX_WALS=""
#ETCD_CORS=""
#
#[cluster]
#ETCD_INITIAL_ADVERTISE_PEER_URLS="http://localhost:2380"
# if you use different ETCD_NAME (e.g. test), set ETCD_INITIAL_CLUSTER value for this name, i.e. "test=http://..."
#ETCD_INITIAL_CLUSTER="default=http://localhost:2380"
#ETCD_INITIAL_CLUSTER_STATE="new"
#ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_ADVERTISE_CLIENT_URLS="http://etcd:2379,http://etcd:4001"
#ETCD_DISCOVERY=""
#ETCD_DISCOVERY_SRV=""
#ETCD_DISCOVERY_FALLBACK="proxy"
#ETCD_DISCOVERY_PROXY=""
启动并验证状态
[root@localhost ~]# systemctl start etcd
[root@localhost ~]# etcdctl set testdir/testkey0 [root@localhost ~]# etcdctl get testdir/testkey0 [root@localhost ~]# etcdctl -C http://etcd:4001 cluster-health
member 8e9e05c52164694d is healthy: got healthy result from http://0.0.0.0:2379
cluster is healthy
[root@localhost ~]# etcdctl -C http://etcd:2379 cluster-health
member 8e9e05c52164694d is healthy: got healthy result from http://0.0.0.0:2379
cluster is healthy
扩展:Etcd集群部署参见——http://www.cnblogs.com/zhenyuyaodidiao/p/6237019.html
3、部署master
3.1 安装Docker
[root@k8s-master ~]# yum install docker
配置Docker配置文件,使其允许从registry中拉取镜像。
[root@k8s-master ~]# vim /etc/sysconfig/docker # /etc/sysconfig/docker # Modify these options if you want to change the way the docker daemon runs
OPTIONS='--selinux-enabled --log-driver=journald --signature-verification=false'
if [ -z "${DOCKER_CERT_PATH}" ]; then
DOCKER_CERT_PATH=/etc/docker
fi
OPTIONS='--insecure-registry registry:5000'
设置开机自启动并开启服务
[root@k8s-master ~]# chkconfig docker on
[root@k8s-master ~]# service docker start
3.2 安装kubernets
[root@k8s-master ~]# yum install kubernetes
3.3 配置并启动kubernetes
在kubernetes master上需要运行以下组件:
Kubernets API Server
Kubernets Controller Manager
Kubernets Scheduler
相应的要更改以下几个配置中带颜色部分信息:
3.3.1 /etc/kubernetes/apiserver
[root@k8s-master ~]# vim /etc/kubernetes/apiserver ###
# kubernetes system config
#
# The following values are used to configure the kube-apiserver
# # The address on the local server to listen to.
KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0" # The port on the local server to listen on.
KUBE_API_PORT="--port=8080" # Port minions listen on
# KUBELET_PORT="--kubelet-port=10250" # Comma separated list of nodes in the etcd cluster
KUBE_ETCD_SERVERS="--etcd-servers=http://etcd:2379" # Address range to use for services
KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=10.254.0.0/16" # default admission control policies
#KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota"
KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ResourceQuota" # Add your own!
KUBE_API_ARGS=""
3.3.2 /etc/kubernetes/config
[root@k8s-master ~]# vim /etc/kubernetes/config ###
# kubernetes system config
#
# The following values are used to configure various aspects of all
# kubernetes services, including
#
# kube-apiserver.service
# kube-controller-manager.service
# kube-scheduler.service
# kubelet.service
# kube-proxy.service
# logging to stderr means we get it in the systemd journal
KUBE_LOGTOSTDERR="--logtostderr=true" # journal message level, is debug
KUBE_LOG_LEVEL="--v=0" # Should this cluster be allowed to run privileged docker containers
KUBE_ALLOW_PRIV="--allow-privileged=false" # How the controller-manager, scheduler, and proxy find the apiserver
KUBE_MASTER="--master=http://k8s-master:8080"
启动服务并设置开机自启动
[root@k8s-master ~]# systemctl enable kube-apiserver.service
[root@k8s-master ~]# systemctl start kube-apiserver.service
[root@k8s-master ~]# systemctl enable kube-controller-manager.service
[root@k8s-master ~]# systemctl start kube-controller-manager.service
[root@k8s-master ~]# systemctl enable kube-scheduler.service
[root@k8s-master ~]# systemctl start kube-scheduler.service
4、部署node
4.1 安装docker
参见3.1
4.2 安装kubernets
参见3.2
4.3 配置并启动kubernetes
在kubernetes node上需要运行以下组件:
Kubelet
Kubernets Proxy
相应的要更改以下几个配置文中带颜色部分信息:
4.3.1 /etc/kubernetes/config
[root@K8s-node- ~]# vim /etc/kubernetes/config ###
# kubernetes system config
#
# The following values are used to configure various aspects of all
# kubernetes services, including
#
# kube-apiserver.service
# kube-controller-manager.service
# kube-scheduler.service
# kubelet.service
# kube-proxy.service
# logging to stderr means we get it in the systemd journal
KUBE_LOGTOSTDERR="--logtostderr=true" # journal message level, is debug
KUBE_LOG_LEVEL="--v=0" # Should this cluster be allowed to run privileged docker containers
KUBE_ALLOW_PRIV="--allow-privileged=false" # How the controller-manager, scheduler, and proxy find the apiserver
KUBE_MASTER="--master=http://k8s-master:8080"
4.3.2 /etc/kubernetes/kubelet
[root@K8s-node- ~]# vim /etc/kubernetes/kubelet ###
# kubernetes kubelet (minion) config # The address for the info server to serve on (set to 0.0.0.0 or "" for all interfaces)
KUBELET_ADDRESS="--address=0.0.0.0" # The port for the info server to serve on
# KUBELET_PORT="--port=10250" # You may leave this blank to use the actual hostname
KUBELET_HOSTNAME="--hostname-override=k8s-node-1" # location of the api-server
KUBELET_API_SERVER="--api-servers=http://k8s-master:8080" # pod infrastructure container
KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest" # Add your own!
KUBELET_ARGS=""
启动服务并设置开机自启动
[root@k8s-master ~]# systemctl enable kubelet.service
[root@k8s-master ~]# systemctl start kubelet.service
[root@k8s-master ~]# systemctl enable kube-proxy.service
[root@k8s-master ~]# systemctl start kube-proxy.service
4.4 查看状态
在master上查看集群中节点及节点状态
[root@k8s-master ~]# kubectl -s http://k8s-master:8080 get node
NAME STATUS AGE
k8s-node- Ready 3m
k8s-node- Ready 16s
[root@k8s-master ~]# kubectl get nodes
NAME STATUS AGE
k8s-node- Ready 3m
k8s-node- Ready 43s
至此,已经搭建了一个kubernetes集群,但目前该集群还不能很好的工作,请继续后续的步骤。
5、创建覆盖网络——Flannel
5.1 安装Flannel
在master、node上均执行如下命令,进行安装
[root@k8s-master ~]# yum install flannel
版本为0.0.5
5.2 配置Flannel
master、node上均编辑/etc/sysconfig/flanneld,修改红色部分
[root@k8s-master ~]# vi /etc/sysconfig/flanneld # Flanneld configuration options # etcd url location. Point this to the server where etcd runs
FLANNEL_ETCD_ENDPOINTS="http://etcd:2379" # etcd config key. This is the configuration key that flannel queries
# For address range assignment
FLANNEL_ETCD_PREFIX="/atomic.io/network" # Any additional options that you want to pass
#FLANNEL_OPTIONS=""
5.3 配置etcd中关于flannel的key
Flannel使用Etcd进行配置,来保证多个Flannel实例之间的配置一致性,所以需要在etcd上进行如下配置:(‘/atomic.io/network/config’这个key与上文/etc/sysconfig/flannel中的配置项FLANNEL_ETCD_PREFIX是相对应的,错误的话启动就会出错)
[root@k8s-master ~]# etcdctl mk /atomic.io/network/config '{ "Network": "10.0.0.0/16" }'
{ "Network": "10.0.0.0/16" }
5.4 启动
启动Flannel之后,需要依次重启docker、kubernete。
在master执行:
systemctl enable flanneld.service
systemctl start flanneld.service
service docker restart
systemctl restart kube-apiserver.service
systemctl restart kube-controller-manager.service
systemctl restart kube-scheduler.service
在node上执行:
systemctl enable flanneld.service
systemctl start flanneld.service
service docker restart
systemctl restart kubelet.service
systemctl restart kube-proxy.service
以上文章均为我个人通过读书+测试环境验证,自己总结出来的。原创。
涉及到的书籍——Kubernetes实战、Kubernetes权威指南:从Docker到Kubernetes实践全接触、每天5分钟玩转Docker容器技术、Docker容器:利用Kubernetes、Flannel、Cockpit和Atomic构建和部署
Centos7部署Kubernetes集群的更多相关文章
- [Kubernetes]CentOS7部署Kubernetes集群
环境介绍及安装前准备 三台机器,用于部署k8s的运行环境: 节点 ip Master 192.168.243.138 Node1 192.168.243.139 Node2 192.168.243.1 ...
- Centos7部署Kubernetes集群(单工作节点)+配置dashboard可视化UI
目标:docker+kubernetes+cadvosor+dashboard 一:物理硬件 两台虚拟机(centos7):一台做为主节点(master),一台做为工作节点(node) [root@M ...
- Centos7部署kubernetes集群CA证书创建和分发(二)
1.解压软件包 [root@linux-node1 ~]# cd /usr/local/src/ [root@linux-node1 src]# ls k8s-v1.10.1-manual.zip [ ...
- 在CentOS7上部署Kubernetes集群
在CentOS7上部署Kubernetes集群 文/FCBusquest 2015-12-22 18:36:00 简介 Kubernetes(k8s)是Google开源的大规模容器集群管理系统, 本文 ...
- 二进制部署 Kubernetes 集群
二进制部署 Kubernetes 集群 提供的几种Kubernetes部署方式 minikube Minikube是一个工具,可以在本地快速运行一个单点的Kubernetes,尝试Kubernet ...
- Kubernetes探索学习001--Centos7.6使用kubeadm快速部署Kubernetes集群
Centos7.6使用kubeadm快速部署kubernetes集群 为什么要使用kubeadm来部署kubernetes?因为kubeadm是kubernetes原生的部署工具,简单快捷方便,便于新 ...
- 二进制包部署Kubernetes集群
今天这篇文章教给大家如何快速部署一套Kubernetes集群.K8S集群部署有几种方式:kubeadm.minikube和二进制包.前两者属于自动部署,简化部署操作,我们这里强烈推荐初学者使用二进制包 ...
- 和我一步步部署 kubernetes 集群
和我一步步部署 kubernetes 集群 本系列文档介绍使用二进制部署最新 kubernetes v1.6.1 集群的所有步骤,而不是使用 kubeadm 等自动化方式来部署集群: 在部署的过程中, ...
- 使用kubeadm部署Kubernetes集群
一.环境架构与部署准备 1.集群节点架构与各节点所需安装的服务如下图: 2.安装环境与软件版本: Master: 所需软件:docker-ce 17.03.kubelet1.11.1.kubeadm1 ...
随机推荐
- Python3执行DOS命令并截取其输出到一个列表字符串,同时写入一个文件
#执行DOS命令并截取其输出到一个列表字符串,同时写入一个文件#这个功能很有用listing=os.popen('ipconfig').readlines()for i in listing: pri ...
- django之normalize函数的功能
from django.utils.regex_helper import normalize pat=r'^(?P<id>\d+)/(?P<name>\d+)$' bits= ...
- leetcode56
public class Solution { public IList<Interval> Merge(IList<Interval> intervals) { var le ...
- leetcode139
class Solution { public: bool wordBreak(string s, vector<string> wordDict) { vector<, false ...
- 直接添加viewController中的view时的注意事项
直接添加viewController中的view时需要注意一个问题,比如: MyTestViewController *vc = [MyTestViewController new]; [self.v ...
- mysql 乐观锁实现
一.为什么需要锁(并发控制)? 在多用户环境中,在同一时间可能会有多个用户更新相同的记录,这会产生冲突.这就是著名的并发性问题. 典型的冲突有: 1.丢失更新:一个事 ...
- BuildTool
(一)BuildTool是什么 BuildTool 构建工具 ,是一个把源代码生成可执行应用程序的过程自动化的程序(例如Android app生成apk).构建包括编译.连接跟把代码打包成可用的或可 ...
- 交叉编译bash
1 下载bash版本:[version 4.2.53]地址:http://ftp.gnu.org/gnu/bash/ 2 解压将下载的bash压缩包解压,命令: # mkdir /home/carri ...
- Java日期时间处理
Java 日期时间处理 一.时间相关类 java.lang.System java.util.Date java.util.Calendar java.util.GregorianCalendar j ...
- springboot自带定时任务和集成quartz
1,springboot自带的定时任务 默认是单线程 有这个依赖就可以 <dependency> <groupId>org.springframework.boot</ ...