Haproxy+mongos Building high-availability load-balanced MongoDB

In the production environment, the MongoDB shards are built, providing three mongos interfaces. However, there is no failover mechanism in MongoDB, the official recommendation is to deploy MONGOs and application servers together, multiple application servers will deploy multiple MONGOs instances, which is inconvenient. Check it out, there are several ways to make these three mongos interfaces available, reducing the pressure on a single interface. Commonly used are LVS and haproxy. So try to do load balancing with Haproxy.

Haproxy is a high availability, load balancing, and proxy software based on TCP and HTTP applications, Haproxy is completely free, with Haproxy to provide fast and reliable proxy solutions based on TCP and HTTP applications. Haproxy is suitable for those Web sites that are heavily loaded, and these sites typically require session hold or seven-tier processing. Haproxy can support tens of thousands of concurrent connections, and Haproxy's operating mode makes it easy and secure to integrate into the architecture while protecting the Web server from being exposed to the network.

Start now, using the Ubuntu64-bit operating system

1. Install Haproxy on Ubuntu:

sudo apt-get install Haproxy

2. After installation, it is configured to boot from:

sudo vim/etc/default/haproxy

Change enable=0 to enable=1 save exit

3. Configure Haproxy:

sudo vim/etc/haproxy/haproxy.cfg, modify the contents of the inside as:

Global

chroot/data/app_platform/haproxy/share/

User Root

Group Root

Pidfile/var/run/haproxy.pid

Nbproc 1

stats socket/tmp/haproxy level admin

Stats Maxconn 20

Node Master_loadbalance1

Description LB1

maxconn 65536

Nosplice

spread-checks 3

Defaults

Log Global

Mode TCP

Option Abortonclose

Option Allbackups

Option Tcpka

Option Redispatch

Retries 3

Timeout Check 60s

Timeout Connect 600s

Timeout Queue 600s

Timeout Server 600s

Timeout Tarpit 60s

Timeout Client 600s

Frontend Mongos_pool 0.0.0.0:28018

Mode TCP

Maxconn 32768

no option dontlognull

Option Tcplog

Log Global

Option Log-separate-errors

default_backend Mongos_pool

Backend Mongos_pool

Mode TCP

Balance Source

default-server inter 2s fastinter 1s downinter 5s slowstart 60s rise 2 Fall 5 weight 30

server gintama-xxx-mongos1 172.16.2.230:27017 check maxconn 30000

server Gintama-xxx-mongos2 172.16.2.231:27017 check maxconn 30000

server gintama-xxx-mongos3 172.16.2.232:27017 check maxconn 30000

The corresponding parameters inside are changed to your parameters.

4. Start Haproxy:

On the basis of MONGOs start up, run Haproxy, using the following command:

Haproxy-f/etc/haproxy/haproxy.cfg

Open your database client, link haproxy View results

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For example, the first one is an interface to MONGOs, and the following is Haproxy

Here, you build up the Haproxy+mongos MongoDB frame, and use up to three mongos.

Report:

Start Haproxy:sudo/etc/init.d/haproxy Start

Restart Haproxy:sudo/etc/init.d/haproxy restart

Close Haproxy:sudo/etc/init.d/haproxy Stop

This article is from the "Black Time" blog, so be sure to keep this source http://blacktime.blog.51cto.com/11722918/1795306

Haproxy+mongos Building high-availability load-balanced MongoDB