Differences between revisions 7 and 10 (spanning 3 versions)
⇤ ← Revision 7 as of 2018-01-09 23:51:40 →
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Editor: Kristian Kallenberg
Comment:
← Revision 10 as of 2018-01-10 00:03:50 → ⇥
Size: 1262
Editor: Kristian Kallenberg
Comment:
Deletions are marked like this. Additions are marked like this.
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= Corosync and HA-proxy= = Corosync and HA-proxy =
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apt-get install corosync haproxy apt-get install corosync haproxy crmsh
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== Configuration ==

=== Apache ===
Add the following to `/etc/haproxy/haproxy.cfg`
{{{
listen webfarm
        bind www:80
        mode http
        balance roundrobin
        cookie LBN insert indirect nocache
        option httpclose
        option forwardfor
        server haproxy01 www01:80 cookie node1 check
        server haproxy02 www02:80 cookie node2 check
}}}

Corosync and HA-proxy

We will use corosync to create a virtual IP-address which is shared by two systems. One of the systems has the virtual IP-address. If the system goes down, the other system will take over the virtual IP-address. HA-proxy will be running on each of the hosts relaying incoming HTTP-requests to two webservers.

  • 192.168.1.47 virtual IP-address
  • 192.168.1.48 haproxy01
  • 192.168.1.49 haproxy02

Software

apt-get install corosync haproxy crmsh

Configuration

Add the local network and a multicast address to /etc/corosync/corosync.conf in the interface section 

interface {
        bindnetaddr: 192.168.1.0 
        mcastaddr: 239.192.1.1
}

Restart corosync to load the new configuration. 

service corosync restart

Commmands

Run the following on startup 



Configuration




Apache


Add the following to /etc/haproxy/haproxy.cfg 
listen webfarm 
        bind www:80
        mode http
        balance roundrobin
        cookie LBN insert indirect nocache
        option httpclose
        option forwardfor
        server haproxy01 www01:80 cookie node1 check
        server haproxy02 www02:80 cookie node2 check
None: Corosync and HA-proxy  (last edited 2021-08-12 09:31:08 by Kristian Kallenberg)