Nginx_Clustering

#Lab Environment
    web01 : 172.16.137.130
    web02 : 172.16.137.131
    web03 : 172.16.137.132

#Web01 / Web02 / Web03

    apt install -y ssh

        nano /etc/ssh/sshd_config
        PermitRootLogin yes

    apt install -y nginx
        echo '<h1> webXX - cluster lab</1>' > /var/www/html/index.nginx-debian.html
        systemctl stop nginx

    apt install -y pacemaker corosync crmsh
        systemctl stop corosync
        systemctl stop pacemaker

#Web01
    apt install -y haveged
    corosync-keygen
    cd /etc/corosync/
    mv corosync.conf corosync.conf.backup
    nano corosync.conf

    # Totem Protocol Configuration
    totem {
        version: 2
        cluster_name: nginx_cluster_1
        transport: udpu
        # Interface configuration for Corosync
        interface {
            ringnumber: 0
            bindnetaddr: 172.16.137.0
            broadcast: yes
            mcastport: 5407
        }
    }
    # Nodelist - Server List
    nodelist {
        node {
            ring0_addr: web01
        }
        node {
            ring0_addr: web02
        }
        node {
            ring0_addr: web03
        }
    }
    # Quorum configuration
    quorum {
        provider: corosync_votequorum
    }
    # Corosync Log configuration
    logging {
        to_logfile: yes
        logfile: /var/log/corosync/corosync.log
        to_syslog: yes
        timestamp: on
    }
    service {
        name: pacemaker
        ver: 0
    }

#Copy corosync files from web01 to web02 and web03
    scp /etc/corosync/* root@web02:/etc/corosync/
    scp /etc/corosync/* root@web03:/etc/corosync/


#Configure the virtual_ip
sudo crm configure primitive virtual_ip \
ocf:heartbeat:IPaddr2 params ip="172.16.137.200" \
cidr_netmask="32" op monitor interval="10s" \
meta migration-threshold="10"

sudo crm configure primitive webserver \
ocf:heartbeat:nginx configfile=/etc/nginx/nginx.conf \
op start timeout="40s" interval="0" \
op stop timeout="60s" interval="0" \
op monitor interval="10s" timeout="60s" \
meta migration-threshold="10"

crm resource status