Control sequence
Required processes
In a High Availability environment the primary fails over to the secondary when certain processes don't start or fail while running. If any process listed in the table below fails on the primary, then the secondary attempts to take control. Depending on the appliance and platform being used, different processes are required. See the table below for additional information.
|
Required Process |
FortiNAC Control Manager |
FortiNAC Control Server |
FortiNAC Application Server |
FortiNAC Server |
|---|---|---|---|---|
|
mysql |
X |
X |
|
X |
|
sshd |
X |
X |
X |
X |
|
dhcpd |
|
|
X |
X |
|
httpd |
|
|
X |
X |
|
named |
|
|
X |
X |
|
tomcat-admin |
X |
X |
|
X |
|
tomcat-portal |
|
|
X |
X |
Determining whether the secondary needs to take control
The secondary server pings the primary server every 30 to 60 seconds depending on the time spent "validating" the connection to determine whether the primary is still in control.
If the secondary receives no response from the primary after five attempts, the secondary pings the gateway configured in the High Availability Tab and the default gateway for the appliance. See Primary and secondary configuration.
- If the gateway is reachable, after 30 seconds the secondary takes control, since the primary is assumed to be isolated from the network.
- If the gateway is not reachable, the secondary will not take control since the secondary is assumed to be isolated from the network and the primary could be functioning properly.
|
If the secondary is Idle, it does not take control. For example, the secondary can be set to Idle when Reboot and Shutdown commands are run on the primary. |
CLI control scripts
The following scripts are used by FortiNAC to control the server and are located in /bsc/campusMgr/bin
|
Script |
Description |
|
hsIsSlaveActive |
Determines if the secondary SQL server is performing replication. |
|
hsRestartCMMaster |
Executed on the Primary FortiNAC Server, FortiNAC Control Server, or FortiNAC Control Manager appliance to recover after a failover. It copies the database and other files from the secondary appliance. Also resets the process states back to the master and restarts both servers. |
|
hsRestartCMRCMaster |
Executed on the primary FortiNAC Application Server to recover after a failover. It copies all the required files from the secondary FortiNAC Application Server. Also resets the process states back to the master and restarts both servers. |
