部署docker swarm集群
基础环境
|
机器名称 |
IP地址 |
安装的软件 |
|
node-1 |
192.168.10.190 |
docker-ce |
|
node-2 |
192.168.10.191 |
docker-ce |
|
node-3 |
192.168.10.192 |
docker-ce |
系统信息
[root@huanglf ~]# cat /etc/redhat-release
CentOS Linux release 7.8.2003 (Core)
[root@huanglf ~]# uname -a
Linux huanglf 3.10.0-1127.18.2.el7.x86_64 #1 SMP Sun Jul 26 15:27:06 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
[root@huanglf ~]#
1、基础优化
1、时间同步
echo "#time sync by fage at 2020-7-22" >>/var/spool/cron/root echo "*/5 * * * * /usr/sbin/ntpdate ntp1.aliyun.com >/dev/null 2>&1" >>/var/spool/cron/root
systemctl restart crond.service 2、关闭防火墙和selinux systemctl stop firewalld && systemctl disable firewalld && setenforce 0 && sed -i s#SELINUX=enforcing#SELINUX=disable#g /etc/selinux/config 3、更改主机名 hostname node-1 echo "node-1" >/etc/hostname hostname node-2 echo "node-2" >/etc/hostname hostname node-3 echo "node-3" >/etc/hostname 4、更改hosts文件 cat >/etc/hosts <<EOF 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.10.190 node-1 192.168.10.191 node-2 192.168.10.192 node-3 EOF 5、分发公钥，每台都要执行 ssh-keygen -t rsa -f /root/.ssh/id_rsa -P "" ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.10.190 ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.10.191 ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.10.192 6、安装基础软件 yum install -y lrzsz nmap tcpdump screen tree dos2unix nc iproute net-tools unzip wget vim bash-completion.noarch telnet ntp ntpdate lsof curl 7、更换国内原 wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
2、安装docker
yum install -y yum-utils device-mapper-persistent-data lvm2
wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo
yum makecache fast
yum install -y docker-ce-19.03.12
mkdir -p /etc/docker
cat > /etc/docker/daemon.json << EOF
{
"registry-mirrors": ["https://b9pmyelo.mirror.aliyuncs.com"]
}
EOF
systemctl daemon-reload && systemctl enable docker
systemctl start docker && systemctl status docker
docker info
docker -v
3、初始化swarm集群
docker swarm init --advertise-addr 192.168.10.190 #执行 docker swarm init 命令的节点自动成为管理节点
docker swarm join-token manager #获取加入集群的token
第一个token是以woker节点进行加入，
docker swarm join --token SWMTKN-1-3vlcflfbvznbgs7jpwoyhxvxkeuvegj9a7y03z0kanx1g8x2br-7wr0xgld21j37cah9y4l78reg 192.168.10.190:2377
第二个是以manager方式进行加入
docker swarm join --token SWMTKN-1-3vlcflfbvznbgs7jpwoyhxvxkeuvegj9a7y03z0kanx1g8x2br-bz1kyjun7waedda9iusenl2e9 192.168.10.190:2377
常用指令
docker node ls #查看节点数量
docker node promote node-2 # 将工作节点提升为管理节点
docker node demote node-3 # 将管理节点降级为woker节点
service管理
docker service create --name web -p 80:80 nginx
查看service
docker service ps web
扩容和缩容service
docker service scale web=3
删除service
docker service rm web
