Red Hat NETWORK 3.6 - Bedienungsanleitung PDF herunterladen (Seite 49)

Appendix A: Troubleshooting

A.1.1 Host is not Added to a Logical Server in UFM

Verify the server is visible in UFM. If it does not appear there, run:

#cat /sys/class/infiniband/mlx4_0/node_desc

The output should be something other than localhost HCA-1.

You can change it by running:

#echo “web1 HCA-1” > /sys/class/infiniband/mlx4_0/node_desc

A.1.2 Migration of VM Fails

Step 1: Check that libvirtd on the target is listening on TCP port.

# netstat -nap |grep libvirtd

tcp 0 0 0.0.0.0:16509 0.0.0.0:*

LISTEN 30771/libvirtd

Step 2: From the source, run:

#virsh -c qemu+tcp://target_host/system capabilities

Where target_host is the host name of the target.

The command should return without errors.

Step 3: Check that the file /etc/sysconfig/libvirtd has the following lines:

LIBVIRTD_ARGS=--listen

DAEMON_COREFILE_LIMIT=unlimited

Step 4: Check that the port libvirtd uses is not blocked by a firewall.

A.1.3 Connection Verification of Virtual Machines Using eIPoIB

Verify the command virsh list runs without errors.

If you get a prompt for authentication, edit the file /etc/libvirt/libvirt.conf by changing this line:

auth_unix_rw=”sasl”

To:

auth_unix_rw=”none”

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Red Hat NETWORK 3.6 - Bedienungsanleitung Seite 49