Difference between revisions of "4 server redundant solution"

Revision as of 07:47, 25 October 2010

Servers 1 and 2 (S1 and S2) are identical. They serve as gateways with Asterisk + MOR installed.
Both of them have two network interfaces - one for Virtual IP which is visible from outside, and one for local IP for interconnection heartbeat monitoring
LinuxHA heartbeat monitors servers, e.g.
- When S1 fails - S2 sees that and after 10s (default) will take Virtual IP, e.g. will start to serve calls, it is done automatically
- When S1 is back up - S2 returns Virtual IP to S1 and system starts to function in normal work flow (done automatically).

Servers 3 and 4 (S3 and S4) are identical. They serve as MySQL DB.
Both of them have two network interfaces - one for Virtual DB IP which is visible for Asterisk servers S1 and S2, and one for local IP for interconnection heartbeat monitoring
LinuxHA heartbeat monitors servers, e.g.
- When S3 fails - S4 sees that and after 10s (default) will take main IP, it is done automatically
- When S3 is back up - S4 returns Virtual IP to S3 and system starts to function in normal work flow (done automatically).
- S1 connects to S3 over Virtual DB IP
- S2 always interacts with S4 to take away load from main DB server (S3)
DBs on S3 and S4 are synchronized over MySQL Replication

More info:

@@ Line 2: / Line 2: @@
-* Servers 1 and 2 (S1 and S2) are identical. They server as gateways with Asterisk + MOR installed.
+* Servers 1 and 2 (S1 and S2) are identical. They serve as gateways with Asterisk + MOR installed.
 * Both of them have two network interfaces - one for [http://en.wikipedia.org/wiki/Virtual_IP_address  Virtual IP] which is visible from outside, and one for local IP for interconnection [[Linux Heartbeat | heartbeat monitoring]]
 * LinuxHA heartbeat monitors servers, e.g.