k8s搭建

1.0 準(zhǔn)備

準(zhǔn)備這個(gè)CentOS-7-x86_64-Minimal-1810
然后用vmware 或者virtualbox 安裝他

1.1 切換阿里的yum源

#安裝wget
yum install -y wget
#切換yum源
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
yum makecache
#安裝網(wǎng)絡(luò)工具
yum install -y net-tools

1.2關(guān)閉防火墻

systemctl stop firewalld & systemctl disable firewalld

1.3關(guān)閉swap

#臨時(shí)關(guān)閉
swapoff -a
#永久關(guān)閉,重啟后生效
vi /etc/fstab
#注釋以下代碼

/dev/mapper/centos-swap swap ...

1.4 配置docker 源

yum -y install yum-utils
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum makecache

1.5 關(guān)閉selinux

#獲取狀態(tài)
getenforce
#暫時(shí)關(guān)閉
setenforce 0
#永久關(guān)閉 需重啟
vi /etc/sysconfig/selinux
#注釋以下代碼

SELINUX=disabled

2.0 配置服務(wù)器

準(zhǔn)備3臺(tái)機(jī)子

#3臺(tái)服務(wù)器ip信息

172.16.253.129
172.16.253.130
172.16.253.131

2.1 設(shè)置host

在3臺(tái)服務(wù)器上都執(zhí)行以下代碼

echo "172.16.253.129 srv.master" >> /etc/hosts
echo "172.16.253.130 srv.etcd" >> /etc/hosts
echo "172.16.253.131 srv.node1" >> /etc/hosts

3.1搭建etcd

#登錄etcd服務(wù)器
ssh root@172.16.253.130
#下載etcd
yum -y install etcd
#配置config
vi /etc/etcd/etcd.conf
#設(shè)置如下

ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"
ETCD_ADVERTISE_CLIENT_URLS="http://srv.etcd:2379"

3.2 運(yùn)行etcd

#設(shè)置開(kāi)機(jī)啟動(dòng) 且啟動(dòng)服務(wù)
systemctl enable etcd && systemctl start etcd

[root@localhost ~]# netstat -nlp | grep etcd
tcp 0 0 127.0.0.1:2380 0.0.0.0:* LISTEN 7130/etcd
tcp6 0 0 :::2379

3.3配置etcd內(nèi)網(wǎng)信息

#設(shè)置 (就像定義一個(gè)變量一樣)
etcdctl -C http://172.16.253.130:2379 set /atomic.io/network/config '{"Network":"172.17.0.0/16"}' 
 
#獲取
# etcdctl -C http://172.16.253.130:2379 get /atomic.io/network/config
{"Network":"172.17.0.0/16"}

注:
172.17.0.0/16這個(gè)是節(jié)點(diǎn)主機(jī)Docker網(wǎng)卡的網(wǎng)段。
/atomic.io/network/config類(lèi)似定義的變量名，在節(jié)點(diǎn)機(jī)中Flanneld配置里的FLANNEL_ETCD_PREFIX項(xiàng)對(duì)應(yīng)症脂。

4.1 master服務(wù)器上安裝服務(wù)

#登錄master服務(wù)器
ssh root@172.16.253.129
#安裝服務(wù)
yum -y install kubernetes-master
#配置config
vi /etc/kubernetes/apiserver
# 配置如下

KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"
KUBE_ETCD_SERVERS="--etcd-servers=http://srv.etcd:2379"

#配置config
vi  /etc/kubernetes/config
#配置如下

KUBE_MASTER="--master=http://srv.master:8080"

4.3 啟動(dòng)

systemctl enable kube-apiserver kube-scheduler kube-controller-manager
systemctl start kube-apiserver kube-scheduler kube-controller-manager

[root@localhost ~]# netstat -nlpt | grep kube
tcp6 0 0 :::6443 :::* LISTEN 15190/kube-apiserve
tcp6 0 0 :::10251 :::* LISTEN 15191/kube-schedule
tcp6 0 0 :::10252 :::* LISTEN 15192/kube-controll
tcp6 0 0 :::8080 :::* LISTEN 15190/kube-apiserve

4.4 測(cè)試

curl http://172.16.253.129:8080/version

4.5 若創(chuàng)建pod認(rèn)證失敗

#修改配置
vi /etc/kubernetes/apiserver
#修改如下文

KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota"

在該行刪除ServiceAccount SecurityContextDeny 這2個(gè)選項(xiàng)

#重啟服務(wù)
systemctl restart kube-apiserver

刪除pod,重新創(chuàng)建

5.0部署node

ssh root@172.16.253.131

5.1安裝docker

#安裝docker 
yum -y install docker
#開(kāi)機(jī)自啟 并啟動(dòng)
systemctl enable docker  && systemctl start docker

[root@localhost ~]# ip a s docker0
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default 
    link/ether 02:42:35:d7:43:6f brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 scope global docker0
       valid_lft forever preferred_lft forever

#修改config
vi  /etc/docker/daemon.json
#設(shè)置如下

"registry-mirrors": ["https://registry.docker-cn.com"]

#重啟
systemctl restart docker
#查看倉(cāng)庫(kù)源是否設(shè)置成功
docker info

5.2部署flannel

#安裝
yum -y install flannel
#修改配置
vi /etc/sysconfig/flanneld
#修改如下

FLANNEL_ETCD_ENDPOINTS="http://srv.etcd:2379"
FLANNEL_ETCD_PREFIX="/atomic.io/network"

#開(kāi)機(jī)自啟并啟動(dòng)服務(wù)
systemctl enable flanneld && systemctl restart flanneld`

[root@localhost ~]# netstat -nlp | grep flanneld
udp        0      0 172.16.253.131:8285     0.0.0.0:*                           7670/flanneld

5.3 部署k8s-node

#安裝服務(wù)
yum -y install kubernetes-node
#修改配置
vi /etc/kubernetes/config
#修改如下文