Shulou(Shulou.com)06/02 Report--

Redhat builds centos image as yum source

1. Query the yum installation package for redhat

[root@localhost ~] # rpm-qa | grep yum

Yum-plugin-fastestmirror-1.1.30-37.el6.noarch

Yum-metadata-parser-1.1.2-16.el6.i686

Yum-utils-1.1.30-37.el6.noarch

Yum-plugin-security-1.1.30-37.el6.noarch

Yum-3.2.29-75.el6.centos.noarch

Yum-rhn-plugin-0.9.1-43.el6.noarch

two。 Delete the original yum

[root@localhost ~] # rpm-qa | grep yum | xargs rpm-e-- nodeps

[root@localhost ~] # rpm-qa | grep yum

3. Download the required installation package

Python-urlgrabber-3.9.1-11.el6.noarch.rpm

Yum-metadata-parser-1.1.2-16.el6.x86_64.rpm

Yum-3.2.29-81.el6.centos.noarch.rpm

Yum-plugin-fastestmirror-1.1.30-40.el6.noarch.rpm

Yum-utils-1.1.30-40.el6.noarch.rpm

4. Install the RPM package

[root@localhost soft] # rpm-ivh-- force python-urlgrabber-3.9.1-11.el6.noarch.rpm

[root@localhost soft] # rpm-ivh yum-*.rpm

[root@localhost ~] # mkdir / yum

Upload the image to the / yum directory and configure the yum source

[root@localhost soft] # cd / etc/yum.repos.d/

[root@localhost yum.repos.d] # vi redhat.repo

[base]

Name=RedHat

Baseurl= file:///yum

Enabled=1

Gpgcheck=0

Gpgkey= http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

[root@localhost yum.repos.d] # yum clean all

[root@localhost yum.repos.d] # yum repolist

Configuration of Nginx Agent HA Cluster

1. Install keepalived on both machines to act as a HA cluster for nginx agents.

Host installs keepalived

[root@localhost soft] # tar-zxvf keepalived-1.2.7.tar.gz

[root@localhost soft] # cd keepalived-1.2.7

[root@localhost keepalived-1.2.7] # yum-y install popt-devel

[root@localhost keepalived-1.2.7] #. / configure-prefix=/usr/local/keepalived/

[root@localhost keepalived-1.2.7] # make

[root@localhost keepalived-1.2.7] # make install

[root@localhost keepalived-1.2.7] # cp / usr/local/keepalived/sbin/keepalived / usr/sbin/

[root@localhost keepalived-1.2.7] # cp / usr/local/keepalived/etc/sysconfig/keepalived / etc/sysconfig/

[root@localhost keepalived-1.2.7] # cp / usr/local/keepalived/etc/rc.d/init.d/keepalived / etc/init.d/

[root@localhost keepalived-1.2.7] # mkdir / etc/keepalived

[root@localhost keepalived-1.2.7] # cp / usr/local/keepalived/etc/keepalived/keepalived.conf / etc/keepalived/

[root@localhost keepalived-1.2.7] # cd / etc/keepalived/

[root@localhost keepalived-1.2.7] # cat / etc/keepalived/keepalived.conf

! Configuration File for keepalived

Global_defs {

Notification_email {

Acassen@firewall.loc

Failover@firewall.loc

Sysadmin@firewall.loc

}

Notification_email_from Alexandre.Cassen@firewall.loc

Smtp_server 192.168.200.1

Smtp_connect_timeout 30

Router_id LVS_DEVEL

}

Vrrp_instance VI_1 {

State MASTER (identity of the Lord)

Interface eth0 (main network card interface)

Virtual_router_id 51

Mcast_src_ip 192.168.0.111 (primary IP address)

Priority 100

Advert_int 1

Authentication {

Auth_type PASS

Auth_pass 1111

}

Virtual_ipaddress {

192.168.0.114

}

}

Standby installation keepalived

The installation process is the same as above, and the configuration file is as follows

[root@localhost keepalived] # cat / etc/keepalived/keepalived.conf

! Configuration File for keepalived

Global_defs {

Notification_email {

Acassen@firewall.loc

Failover@firewall.loc

Sysadmin@firewall.loc

}

Notification_email_from Alexandre.Cassen@firewall.loc

Smtp_server 192.168.200.1

Smtp_connect_timeout 30

Router_id LVS_DEVEL

}

Vrrp_instance VI_1 {

State SLAVER

Interface eth0

Virtual_router_id 51

Mcast_src_ip 192.168.0.112

Priority 90

Advert_int 1

Authentication {

Auth_type PASS

Auth_pass 1111

}

Virtual_ipaddress {

192.168.0.114

}

}

two。 Start the keepalived service on both machines

[root@localhost ~] # service keepalived restart

3. Check if there is a virtual IP address on the host

4. Monitoring and active / standby switching

Write a script

[root@localhost ~] # cat nginx_check.sh

#! / bin/bash

A = `ps-C nginx-- no-header | wc-l`

If [$a-eq 0]; then

/ usr/local/nginx/sbin/nginx & > / dev/null

Sleep 3

If [`ps-C nginx-- no-header | wc-l`-eq 0]; then

Service keepalived stop & > / dev/null

Fi

Fi

[root@localhost ~] # chmod + x / root/nginx_check.sh

After the script has been written, now call the script in the configuration file of keepalived

[root@localhost ~] # cat / etc/keepalived/keepalived.conf

! Configuration File for keepalived

Global_defs {

Notification_email {

Acassen@firewall.loc

Failover@firewall.loc

Sysadmin@firewall.loc

}

Notification_email_from Alexandre.Cassen@firewall.loc

Smtp_server 192.168.200.1

Smtp_connect_timeout 30

Router_id LVS_DEVEL

}

Vrrp_script check_nginx_status {

Script "/ root/nginx_check.sh"

Interval 2

}

Vrrp_instance VI_1 {

State MASTER

Interface eth0

Virtual_router_id 51

Mcast_src_ip 192.168.0.111

Priority 100

Advert_int 1

Authentication {

Auth_type PASS

Auth_pass 1111

}

Track_script {

Check_nginx_status

}

Virtual_ipaddress {

192.168.0.114

}

}

Lvs load balancing

1. Install ipvsadm on the host machine

[root@bogon ~] # yum-y install ipvsadm

two。 Use keepalived to manage lvs

[root@bogon ~] # cat / etc/keepalived/keepalived.conf

! Configuration File for keepalived

Global_defs {

Notification_email {

Acassen@firewall.loc

Failover@firewall.loc

Sysadmin@firewall.loc

}

Notification_email_from Alexandre.Cassen@firewall.loc

Smtp_server 192.168.200.1

Smtp_connect_timeout 30

Router_id LVS_DEVEL

}

Vrrp_script check_nginx_status {

Script "/ root/nginx_check.sh"

Interval 2

}

Vrrp_instance VI_1 {

State MASTER

Interface eth0

Virtual_router_id 51

Priority 100

Advert_int 1

Authentication {

Auth_type PASS

Auth_pass 1111

}

Track_script {

Check_nginx_status

}

Virtual_ipaddress {

192.168.0.114

}

}

Virtual_server 192.168.0.114 80 {

Delay_loop 6

Lb_algo rr

Lb_kind DR

Nat_mask 255.255.255.0

Persistence_timeout 50

Protocol TCP

Real_server 192.168.0.111 80 {

Weight 1

TCP_CHECK {

Connect_timeout 3

Nb_get_retry 3

Delay_before_retry 3

}

}

Real_server 192.168.0.112 80 {

Weight 1

TCP_CHECK {

Connect_timeout 3

Nb_get_retry 3

Delay_before_retry 3

}

}

}

3. Write lvs management scripts

[root@bogon ~] # cat lvs_keepd.sh

#! / bin/sh

# description:start realserver

Vip=192.168.0.114

Source / etc/rc.d/init.d/functions

Case "$1" in

Start)

Echo "start server"

/ sbin/ifconfig lo:0$ vip broadcast $vip netmask 255.255.255.255 up

Echo 1 > / proc/sys/net/ipv4/conf/lo/arp_ignore

Echo 2 > / proc/sys/net/ipv4/conf/lo/arp_announce

Echo 1 > / proc/sys/net/ipv4/conf/all/arp_ignore

Echo 2 > / proc/sys/net/ipv4/conf/all/arp_announce

Stop)

Echo "stop server"

/ sbin/ifconfig lo:0 down

Echo "0" > / proc/sys/net/ipv4/conf/lo/arp_ignore

Echo "0" > / proc/sys/net/ipv4/conf/lo/arp_announce

Echo "0" > / proc/sys/net/ipv4/conf/all/arp_ignore

Echo "0" > / proc/sys/net/ipv4/conf/all/arp_announce

*)

Echo "Usage: $0 (start | stop)"

Exit 1

Esac

Exit 0

4. Startup script

[root@bogon ~] # bash / root/lvs_keepd.sh start

5. Test whether lvs is started

[root@bogon ~] # ipvsadm-ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn

TCP 192.168.0.114:80 rr persistent 50

-> 192.168.0.111 purl 80 Local 11 0

-> 192.168.0.112 Route 80 1 0

The same is true for the operation on the standby machine.

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