9.6. Analyzing and Monitoring Network Connectivity

Procedure

1. Install skydive-ansible on the Manager machine:

   # yum --disablerepo="*" --enablerepo="rhel-7-server-rpms,rhel-7-server-extras-rpms,rhel-7-server-rh-common-rpms,rhel-7-server-openstack-14-rpms" install skydive-ansible

2. Copy /usr/share/ovirt-engine/playbooks/install-skydive.inventory.sample to the current directory and rename it to inventory.

3. Modify the inventory/01_hosts file as follows (see below for full contents):

   1. Update skydive_os_auth_url with the Manager’s FQDN. This is used by the OVN, which uses the same FQDN as the Manager.
   2. Update ovn_provider_username with the username used for the OVN provider. The default is defined in /etc/ovirt-provider-ovn/ovirt-provider-ovn.conf.
   3. Update ovn_provider_password.

   4. Under [agents:children] <host_group> define the hosts, clusters, or data center on which you are installing the Skydive agents.

      You can view a list of valid groups by running:

       /usr/share/ovirt-engine-metrics/bin/ovirt-engine-hosts-ansible-inventory | python -m json.tool

      Note

      There is no need to list each host explicitly. To install the agent on all hosts in the cluster, add ovirt_cluster_Default. Alternatively, to install the agent on all hosts in the data center, add ovirt_datacenter_Default.

      Sample Inventory File

      [agents]
      [analyzers]
      [skydive:children]
       analyzers
       agents
      
      [skydive:vars]
      skydive_listen_ip=0.0.0.0
      skydive_deployment_mode=package
      skydive_extra_config={'agent.topology.probes': ['ovsdb', 'neutron'], 'agent.topology.neutron.ssl_insecure': true}
      
       skydive_fabric_default_interface=ovirtmgmt
      
       skydive_os_auth_url=https://MANAGERS_FQDN:35357/v2.0
       skydive_os_service_username=ovn_provider_username
       skydive_os_service_password=ovn_provider_password
       skydive_os_service_tenant_name=service
       skydive_os_service_domain_name=Default
       skydive_os_service_region_name=RegionOne
      
      [agents:vars]
      ansible_ssh_private_key_file=/etc/pki/ovirt-engine/keys/engine_id_rsa
      
      [agents:children]
      host_group
      
      [analyzers]
      localhost ansible_connection=local

4. Run the playbook:

   # ansible-playbook -i inventory /usr/share/ovirt-engine/playbooks/install-skydive.yml /usr/share/skydive-ansible/playbook.yml.sample

5. Verify that Skydive recognizes the virtual machine’s port by going to http://MANAGERS_FQDN:8082, selecting a virtual machine, and checking the following fields in the Metadata section of the Capture tab:

   • Manager: Neutron
   • NetworkName: network_name
   • IPV4: IP_address, if a subnet is used

Procedure

1. Install Skydive.
2. Open Skydive from http://MANAGERS_FQDN:8082.
3. Select network_4 on rhv-host1 in the network map.
4. Click Create in the Capture tab and click Start.
5. Repeat the previous steps for network_4 on rhv-host0.
6. Click the Generate tab.
7. Select eth0 on rhv-host0 as the Source and eth0 on rhv-host1 as the Destination.
8. Select ICMPv4/Echo Request from the Type drop-down list.
9. Click Inject to inject a packet.
10. Open the Flows tab. The results of the ping are displayed in a table. If the ping was successful, a row containing ICMPv4 and the source and destination IP addresses is displayed. When you move your cursor over that row, network_4 is highlighted with a yellow circle on the network map.