Differences between revisions 1 and 9 (spanning 8 versions)
⇤ ← Revision 1 as of 2018-01-08 13:01:27 →
Size: 314
Editor: Kristian Kallenberg
Comment:
← Revision 9 as of 2018-01-10 00:03:15 → ⇥
Size: 870
Editor: Kristian Kallenberg
Comment:
Deletions are marked like this. Additions are marked like this.
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= Corosync = = Corosync and HA-proxy =
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We will use corosync to create a virtual IP which is share by two systems 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.
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This has to be configured before haproxy configuration makes any sense, since haproxy should listen on the virtual ip. also we need to configure the dns name for the virtual ip first. so this depends on dns updates too.  * 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
{{{

}}}

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 

None: Corosync and HA-proxy  (last edited 2021-08-12 09:31:08 by Kristian Kallenberg)