AHV

AHV Administration

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Command Reference

Description: Show ovs uplinks for local host

manage_ovs show_uplinks

Description: Show ovs uplinks for full cluster

allssh "manage_ovs show_uplinks"
Show OVS interfaces

Description: Show ovs interfaces for local host

manage_ovs show_interfaces

Show interfaces for full cluster

allssh "manage_ovs show_interfaces"
Show OVS switch information

Description: Show switch information

ovs-vsctl show
List OVS bridges

Description: List bridges

ovs-vsctl list br
Show OVS bridge information

Description: Show OVS port information

ovs-vsctl list port br0
ovs-vsctl list port bond
Show OVS interface information

Description: Show interface information

ovs-vsctl list interface br0
Show ports / interfaces on bridge

Description: Show ports on a bridge

ovs-vsctl list-ports br0

Description: Show ifaces on a bridge

ovs-vsctl list-ifaces br0
Add ports to bridge

Description: Add port to bridge

ovs-vsctl add-port bridge port

Description: Add bond port to bridge

ovs-vsctl add-bond bridge port iface
Show OVS bond details

Description: Show bond details

ovs-appctl bond/show bond

Example:

ovs-appctl bond/show bond0
Set bond mode and configure LACP on bond

Description: Enable LACP on ports

ovs-vsctl set port bond lacp=active/passive

Description: Enable on all hosts for bond0

for i in `hostips`;do echo $i; ssh $i source /etc/profile > /dev/null 2>&1; ovs-vsctl set port bond0 lacp=active;done
Show LACP details on bond

Description: Show LACP details

ovs-appctl lacp/show bond
Set bond mode

Description: Set bond mode on ports

ovs-vsctl set port bond bond_mode=active-backup, balance-slb, balance-tcp
Show OpenFlow information

Description: Show OVS openflow details

ovs-ofctl show br0

Description: Show OpenFlow rules

ovs-ofctl dump-flows br0
Get QEMU PIDs and top information

Description: Get QEMU PIDs

ps aux | grep qemu | awk '{print $2}'

Description: Get top metrics for specific PID

top -p PID
Get active Stargate for QEMU processes

Description: Get active Stargates for storage I/O for each QEMU processes

netstat –np | egrep tcp.*qemu

Metrics and Thresholds

More coming soon!

Troubleshooting & Advanced Administration

Check iSCSI Redirector Logs

Description: Check iSCSI Redirector Logs for all hosts

for i in `hostips`; do echo $i; ssh root@$i cat /var/log/iscsi_redirector;done

Example for single host

Ssh root@HOSTIP
Cat /var/log/iscsi_redirector
Monitor CPU steal (stolen CPU)

Description: Monitor CPU steal time (stolen CPU)

Launch top and look for %st (bold below)

Cpu(s):  0.0%us, 0.0%sy,  0.0%ni, 96.4%id,  0.0%wa,  0.0%hi,  0.1%si,  **0.0%st**
Monitor VM network resource stats

Description: Monitor VM resource stats

Launch virt-top

Virt-top