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

LVS+Keepalived cluster

Keepalived was originally a powerful replication tool designed specifically for LVS.

It is mainly used to provide failover and health check functions-to judge the availability of LVS load schedulers and node servers, and to isolate and replace new servers in time.

Test environment:

Two dispatchers (dual hot standby) IP

192.168.30.30

192.168.30.31

Web Server IP

192.168.30.33

192.168.30.34

Install the required software

Modprobe ip_vs is already included in the centos7 system. Just open it and use it.

Modprobe ip_vs # load IP_vs module

Yum-y install gcc gcc-c++ make popt-devel kernel-devel openssl-devel ipvsadm # installs compilation tools, plug-ins and ipvsadm

Compile and install keepalived on two schedulers

Tar xf keepalived-1.4.2.tar.gz

Cd keepalived-1.4.2

. / configure-- prefix=/

Make & & make install

Cp keepalived/etc/init.d/keepalived / etc/init.d/ # join the system management service

[root@lin3036 keepalived-1.4.2] # systemctl enable keepalived # is set to boot automatically

The other one is installed in the same way.

Modify the first master keepalived.conf file

Vi / etc/keepalived/keepalived.conf

! Configuration File for keepalived

Global_defs {

Router_id LVS_01 # name of this server

}

Vrrp_instance VI_1 {# defines VRRP hot backup instance

State MASTER # Hot standby status. MASTER represents master server, and BACKUP represents slave server.

Interface ens33 # physical interface that carries VIP addresses

ID number of virtual_router_id 51 # virtual router, consistent with each hot backup group

Priority 110# priority, the higher the number, the higher the priority.

Number of seconds between advert_int 1 # announcements (heartbeat rate)

Authentication {# hot backup authentication information, which is consistent with each hot backup group

Auth_type PASS # Certification Type

Auth_pass 6666 # password string

}

Virtual_ipaddress {# specifies the drift address (VIP), which can have multiple

192.168.30.100

}

}

Virtual_server 192.168.30.100 80 {# Virtual Server address (VIP), Port

Interval between delay_loop 6 # health check (seconds)

Lb_algo rr # polling (rr) scheduling algorithm

Lb_kind DR # Direct routing (DR) cluster operation mode

Persistence_timeout 60 # connection hold time (seconds)

Protocol TCP # application server uses TCP protocol

Real_server 192.168.30.33 80 {# address and port of the first Web server node

Weight of weight 1 # nod

TCP_CHECK {# Health check method

Target port checked by connect_port 80 #

Connect_timeout 3 # connection timeout (seconds)

Number of nb_get_retry 3 # retries

Delay_before_retry 3 # retry interval

}

}

Real_server 192.168.30.34 80 {# address and port of the second Web server node

Weight 1

TCP_CHECK {

Connect_port 80

Connect_timeout 3

Nb_get_retry 3

Delay_before_retry 3

}

}

}

[root@dd01 keepalived-1.4.2] # service keepalived start

[root@dd01 keepalived-1.4.2] # ip addr show dev ens33 / / verify the bound virtual address

Standby service configuration keepalived.conf file

! Configuration File for keepalived

Global_defs {

Router_id LVS_02

}

Vrrp_instance VI_1 {

State BACKUP

Interface ens33

Virtual_router_id 51

Priority 105

Advert_int 1

Authentication {

Auth_type PASS

Auth_pass 6666

}

Virtual_ipaddress {

192.168.30.100

}

}

Virtual_server 192.168.30.100 80 {

Delay_loop 6

Lb_algo rr

Lb_kind DR

Persistence_timeout 60

Protocol TCP

Real_server 192.168.30.33 80 {

Weight 1

TCP_CHECK {

Connect_port 80

Connect_timeout 3

Nb_get_retry 3

Delay_before_retry 3

}

}

Real_server 192.168.30.34 80 {

Weight 1

TCP_CHECK {

Connect_port 80

Connect_timeout 3

Nb_get_retry 3

Delay_before_retry 3

}

}

}

Start the service

Configure the primary server LVS

[root@lin3034 keepalived-1.4.2] # modprobe ip_vs # load ip_vs module

Configure the primary server LVS

The standby server is the same

The web server also needs to virtualize the virtual VIP of 192.168.30.100.

Ifconfig lo:0 192.168.30.100 broadcast 192.168.30.100 netmask 255.255.255.255 up

Route add-host 192.168.30.100 dev lo:0

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

Sysctl-p refresh

Check the status of the network card

The other web server has the same configuration

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