Differences between revisions 3 and 10 (spanning 7 versions)

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)

-  ⇤ ← Revision 3 as of 2018-01-09 23:27:53 → 
  Size: 127
  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.
 Line 1:
-= Corosync =
We will use corosync to create a virtual IP which is share by two systems
+= Corosync and HA-proxy =
-Line 4:
+Line 3:
+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 ==
-Line 5:
+Line 11:
-apt-get install corosync
+apt-get install corosync haproxy crmsh
-Line 7:
+Line 13:
+== 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
}}}