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

Ipvs installation:

Check whether lvs:lsmod is installed | grep ip_vs (check whether the ipvs module is loaded successfully)

Install lvs

Method 1:

You can install yum directly in the production environment.

# yum install ipvsadm-y

Ipvsadm is a tool for managing ipvs

Method 2:

After keepalived is installed and keepalived is started, ip_vs will automatically install and load

Load the ip_vs module into the kernel

# ipvsadm (this is the command to load the ip_vs module)

# lsmod | grep ip_vs (check whether the ipvs module is loaded successfully

Ipvs's cluster service:

Tcp,udp,ah,esp,ah_esp,stcp

(1) An ipvs host can define multiple cluster service at the same time.

(2) there should be at least one real server on a cluster service:

When defining, specify lvs-type, and lvs scheduler

The usage of ipvsadm:

Manage cluster services:

Ipvsadm-A | E-t | u | f service-address [- s scheduler] [- p [timeout]]

-A: add a cluster

-D: delete the cluster

-E: modify the cluster

-C: clear the cluster

Example: add a lvs cluster

# ipvsadm-A-t 192.168.0.198 80-s rr

-t: follow up with IP and port (in fact, client-oriented VIP)

-s: specify the algorithm

Example: delete a cluster

# ipvsadm-D-t 192.168.50.199pur80

Service-address: cluster IP address

Tcp:-t ip:port

Udp:-u ip:port

Fwm:-f mark

-s scheduler: default is wlc

-p: implements session persistence. The default time is 360 seconds.

Manage the RS in the cluster:

Ipvsadm-a | e-t | u | f service-address-r server-address [- g | I | m] [- w weight]

Example: add a node to the cluster

# ipvsadm-a-t 192.168.0.199virtual 80-r 192.168.0.164purl 80-g

-t: specify which lvs to add RS to

-r: specify the real hosts to join the lvs cluster, and add ports

-g: specify as director rout, and this mode is also the default

Ipvsadm-d-t | u | f service-address-r server-address

Example: delete a node in the cluster

# ipvsadm-d-t 192.168.50.199Viru 80-r 192.168.50.164RV 80

Service-address: real host address

Ip [: port]

Lvs-type:

-gpurgateway.dr (default to this model)

-iRank ipiptide tun

-mlug masquerade.mat.

Clear and view:

Ipvsadm-C

Ipvsadm-L | l [options]

-n:numric, which displays the address port based on the numeric format (InActConn represents the number of calls to the back-end RS)

-c:connection, showing the ipvs connection

# ipvsadm-Lnc / / shows all connections being established, including which backend server to connect to

-- stats: the sum of statistics for all kinds of information

-- rate: rate statistics

-- exact: displays the exact value without unit conversion

Save and reload:

Ipvsadm-R

Ipvsadm-S [- n]

Set zero counter:

Ipvsadm-Z [- t | u | f service-address]

Set the timeout:

Usage:-- set tcp tcpfin udp set connection timeout values

Example: ipvsadm-set 30 5 60

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