Testing the System - Administration

Let’s check that the load balancer is running on lb:

  # ldirectord ldirectord.cf status

You should see something like this:

  ldirectord for /etc/ha.d/ldirectord.cf is running with pid:
  1455

If you see something like this instead:

  ldirectord is stopped for /etc/ha.d/ldirectord.cf

there’s some problem. You can stop the director and restart it with the debug flag -d, and see whether any errors appear in the output:

  # /usr/sbin/ldirectord /etc/ha.d/ ldirectord.cf stop 
  # /usr/sbin/ldirectord -d /etc/ha.d/ldirectord.cf start
  DEBUG2: Running exec(/usr/sbin/ldirectord -d /etc/ha.d/ldirectord.cf start)
  Running exec(/usr/sbin/ldirectord -d /etc/ha.d/ldirectord.cf start)
  DEBUG2: Starting Linux Director v1.77.2.32 with pid: 12984
  Starting Linux Director v1.77.2.32 with pid: 12984
  DEBUG2: Running system(/sbin/ipvsadm -A -t 70.253.158.42:80 -s rr )
  Running system(/sbin/ipvsadm -A -t 70.253.158.42:80 -s rr )
  DEBUG2: Added virtual server: 70.253.158.42:80
  Added virtual server: 70.253.158.42:80
  DEBUG2: Disabled server=70.253.158.45
  DEBUG2: Disabled server=70.253.158.41
  DEBUG2: Checking negotiate: real 
 server=negotiate:http:tcp:70.253.158.41:80:::\/
director\.html:I\'m\ alive\!
  (virtual=tcp:70.253.158.42:80)
  DEBUG2: check_http: url="http://70.253.158.41:80/director.html"
  virtualhost="70.253.158.41"
  LWP::UserAgent::new: ()
  LWP::UserAgent::request: ()
  LWP::UserAgent::send_request: GET http://70.253.158.41:80/director.html
  LWP::UserAgent::_need_proxy: Not proxied
  LWP::Protocol::http::request: ()
  LWP::Protocol::collect: read 11 bytes
  LWP::UserAgent::request: Simple response: OK
  45:80/director.html is up

The output is shorter ifchecktypeischeck.

Just to be nosy, we’ll see what the lower-level IP virtual server says:

  # ipvsadm -L -n
  IP Virtual Server version 1.2.0 (size=4096)
  Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port		Forward Weight ActiveConn InActConn
TCP	70.253.158.42:80 rr
-> 70.253.158.45:80		Route		1	1	2
-> 70.253.158.41:80		Route		1	0	3

This shows that our first realserver is active, but the second is not.