openshift安装部署

Posted 2021-12-06 flyaway2013

前置准备工作：

1.每台主机准备好有公钥在 /root/.ssh/authorized_keys，私钥则存放在第一台主机的/root/.ssh/id_rsa

2.确定每台主机的私网IP地址是固定的。

3.设置DNS服务器，让openshift.iqyuan.com 指向 HAproxy的公网IP

4. 设置DNS服务器，让*.apps.iqyuan.com 指向 HAproxy的公网IP

5. 公网开放防火墙端口8443、80、443，由云平台提供开放。

6. 提前设定每台主机的hostname，建议加上域名,如  master1.iqyuan.com

   设置命令如下： hostnamectl  set-hostname master1.iqyuan.com

   也可以通过云平台提供的编排功能提前设定主机名称.

 

脚本安装操作：

// 本教程需要精通linux的运维人员才具有理解能力.确保您能读懂如下脚本内容..任何疏忽的配置，都可能导致后续安装失败.

第一台主机第一阶段脚本：

yum install -y epel-release
yum -y  install ansible lrzsz telnet wget pyOpenSSL
wget http://mirrors.ustc.edu.cn/centos/7/os/x86_64/Packages/python-rhsm-certificates-1.19.10-1.el7_4.x86_64.rpm
mkdir -p  /etc/rhsm/ca/
rpm2cpio python-rhsm-certificates-1.19.10-1.el7_4.x86_64.rpm | cpio -iv --to-stdout ./etc/rhsm/ca/redhat-uep.pem | tee /etc/rhsm/ca/redhat-uep.pem
 
 
cat <<EOF > ~/.ssh/id_rsa
-----BEGIN RSA PRIVATE KEY-----
私钥粘贴到这里.公钥提前放到各个主机对应目录，注意权限为600
-----END RSA PRIVATE KEY-----
EOF
chmod 600 ~/.ssh/id_rsa
 
sed -i ‘s/GSSAPIAuthentication yes/StrictHostKeyChecking no/g‘  /etc/ssh/ssh_config
sed -i ‘s/#forks          = 5/forks          = 15/g‘ /etc/ansible/ansible.cfg
 
cat <<EOF > /etc/ansible/hosts
master1.iqyuan.com
[okd]
haproxy1.iqyuan.com
master2.iqyuan.com 
master3.iqyuan.com
node1.iqyuan.com
node2.iqyuan.com
node3.iqyuan.com
infra-node1.iqyuan.com
infra-node2.iqyuan.com
infra-node3.iqyuan.com
EOF
 
cat <<EOF > /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.0.250 node1.iqyuan.com
192.168.0.251 node2.iqyuan.com
192.168.0.3   node3.iqyuan.com
192.168.0.1   infra-node1.iqyuan.com
192.168.0.252 infra-node2.iqyuan.com
192.168.0.2   infra-node3.iqyuan.com
192.168.0.249 master1.iqyuan.com
192.168.0.5   master2.iqyuan.com
192.168.0.6   master3.iqyuan.com
192.168.0.4   haproxy1.iqyuan.com openshift.iqyuan.com
EOF
 
for host in      haproxy1.iqyuan.com      master1.iqyuan.com      master2.iqyuan.com      master3.iqyuan.com      node1.iqyuan.com      node2.iqyuan.com      node3.iqyuan.com      infra-node1.iqyuan.com      infra-node2.iqyuan.com      infra-node3.iqyuan.com;      do scp  /etc/hosts $host:/etc/ ;      done
for host in      haproxy1.iqyuan.com      master1.iqyuan.com      master2.iqyuan.com      master3.iqyuan.com      node1.iqyuan.com      node2.iqyuan.com      node3.iqyuan.com      infra-node1.iqyuan.com      infra-node2.iqyuan.com      infra-node3.iqyuan.com;      do scp -r /etc/rhsm/  $host:/etc/ ;      done
  
ansible all -m shell -a "wipefs -a /dev/vdb; wipefs -a /dev/vdc; sed -i ‘s/SELINUX=disabled/SELINUX=enforcing/g‘  /etc/selinux/config; yum update -y"
ansible okd -m shell -a "systemctl reboot"
#暂停2秒
sleep 2
reboot

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第二阶段脚本：

ansible all -m shell -a "yum install -y telnet lsof wget zip unzip lrzsz git net-tools bind-utils yum-utils  bridge-utils bash-completion kexec-tools sos psacct   docker    glusterfs-fuse python-passlib httpd-tools java-1.8.0-openjdk-headless"
ansible all -m shell -a "setsebool -P virt_sandbox_use_fusefs on; setsebool -P virt_use_fusefs on; echo { \\\"registry-mirrors\\\": [\\\"https://bo30b6ic.mirror.aliyuncs.com/\\\"] } > /etc/docker/daemon.json "
  
# 修改docker存储位置.
cat <<EOF > /etc/sysconfig/docker-storage-setup
DEVS="/dev/vdb"
VG="docker-vg"
DATA_SIZE="95%VG"
STORAGE_DRIVER=overlay2
CONTAINER_ROOT_LV_NAME="dockerlv"
CONTAINER_ROOT_LV_MOUNT_PATH="/var/lib/docker"
EOF
 
for host in      haproxy1.iqyuan.com      master1.iqyuan.com      master2.iqyuan.com      master3.iqyuan.com      node1.iqyuan.com      node2.iqyuan.com      node3.iqyuan.com      infra-node1.iqyuan.com      infra-node2.iqyuan.com      infra-node3.iqyuan.com;      do scp  /etc/sysconfig/docker-storage-setup $host:/etc/sysconfig/ ;      done
      
 
ansible all -m shell -a "docker-storage-setup; systemctl enable NetworkManager;systemctl enable docker; systemctl start NetworkManager;systemctl start docker; docker pull  cockpit/kubernetes:latest"
 
 
# 阿里云特殊，他们镜像缓存有缺陷太慢了.
for host in      haproxy1.iqyuan.com      master1.iqyuan.com      master2.iqyuan.com      master3.iqyuan.com      node1.iqyuan.com      node2.iqyuan.com      node3.iqyuan.com      infra-node1.iqyuan.com      infra-node2.iqyuan.com      infra-node3.iqyuan.com;      do scp  /etc/yum.repos.d/CentOS-Base.repo  $host:/etc/yum.repos.d/ ;      done
 
cd
wget https://github.com/openshift/openshift-ansible/archive/openshift-ansible-3.9.40-1.tar.gz
tar -xzf openshift-ansible-3.9.40-1.tar.gz
mv  openshift-ansible-openshift-ansible-3.9.40-1 openshift-ansible

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开始上传剧本参数文件

rz  ~/inventory ,从windows机器上传.

 

第三阶段安装脚本：

ansible-playbook  -i ~/inventory   ~/openshift-ansible/playbooks/prerequisites.yml
ansible all -m shell -a "sed -i ‘s/mirror.centos.org/mirrors.ustc.edu.cn/g‘ /etc/yum.repos.d/CentOS-OpenShift-Origin.repo"
 
# 初次执行改剧本如果遇到错误，建议分步骤执行，避免耗时.
ansible-playbook  -i ~/inventory   ~/openshift-ansible/playbooks/deploy_cluster.yml
 
ansible all -m shell -a "firewall-cmd --zone=public --add-service=http --add-service=https --permanent && firewall-cmd --reload"

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后续操作：

修改HAproxy的配置，增加80，443端口映射：

修改的HAproxy配置参考：

# Global settings
#---------------------------------------------------------------------
global
    maxconn     20000
    log         /dev/log local0 info
    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    user        haproxy
    group       haproxy
    daemon

    # turn on stats unix socket
    stats socket /var/lib/haproxy/stats

#---------------------------------------------------------------------
# common defaults that all the ‘listen‘ and ‘backend‘ sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
    mode                    http
    log                     global
    option                  httplog
    option                  dontlognull
#    option http-server-close
    option forwardfor       except 127.0.0.0/8
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           1m
    timeout connect         10s
    timeout client          300s
    timeout server          300s
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 20000

listen stats
    bind :9000
    mode http
    stats enable
    stats uri /

frontend  atomic-openshift-api
    bind *:8443
    default_backend atomic-openshift-api
    mode tcp
    option tcplog

backend atomic-openshift-api
    balance source
    mode tcp
    server      master0 192.168.0.249:8443 check
    server      master1 192.168.0.5:8443 check
    server      master2 192.168.0.6:8443 check

frontend  atomic-openshift-80
    bind *:80
    default_backend atomic-openshift-80
    mode tcp
    option tcplog

backend atomic-openshift-80
    balance source
    mode tcp
    server      infra-node1 infra-node1.iqyuan.com:80 check
    server      infra-node2 infra-node2.iqyuan.com:80 check
    server      infra-node3 infra-node3.iqyuan.com:80 check
    
frontend  atomic-openshift-443
    bind *:443
    default_backend atomic-openshift-443
    mode tcp
    option tcplog

backend atomic-openshift-443
    balance source
    mode tcp
    server      infra-node1 infra-node1.iqyuan.com:443 check
    server      infra-node2 infra-node2.iqyuan.com:443 check
    server      infra-node3 infra-node3.iqyuan.com:443 check

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修改完成后执行重启服务 systemctl restart haproxy.service

增加代理服务的防火墙

firewall-cmd --zone=public --add-service=http --add-service=https --permanent && firewall-cmd --reload

 

继续执行其他组件的安装

ansible-playbook  -i ~/inventory  ~/openshift-ansible/playbooks/openshift-metrics/config.yml  -e openshift_metrics_install_metrics=true
ansible-playbook  -i ~/inventory  ~/openshift-ansible/playbooks/openshift-logging/config.yml  -e openshift_logging_install_logging=true