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| -rw-r--r-- | docs/userguide/troubleshooting.rst | 178 |
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diff --git a/docs/userguide/troubleshooting.rst b/docs/userguide/troubleshooting.rst index 7cea6e0c3..44d3aef99 100644 --- a/docs/userguide/troubleshooting.rst +++ b/docs/userguide/troubleshooting.rst @@ -4,21 +4,191 @@ Troubleshooting =============== +This section gives some guidelines about how to troubleshoot the test cases +owned by Functest. + +IMPORTANT: The steps defined below must be executed inside the Functest Docker +container and after sourcing the OpenStack credentials:: + + . $creds + +or:: + + source /home/opnfv/functest/conf/openstack.creds + + + VIM --- +vPing common +^^^^^^^^^^^^ +For both vPing test cases (vPing_SSH, and vPing_userdata), the first steps are +similar: + * Create Glance image + * Create Network + * Create Security Group + * Create instances + +After these actions, the test cases differ and will be explained in their section. + +This test cases can be run inside the container as follows:: + + $repos_dir/functest/docker/run_tests.sh -t vping_ssh + $repos_dir/functest/docker/run_tests.sh -t vping_userdata + +The *run_tests.sh* script is calling internally the vPing scripts, located in +*$repos_dir/functest/testcases/vPing/CI/libraries/vPing_ssh.py* or +*$repos_dir/functest/testcases/vPing/CI/libraries/vPing_userdata.py* with the +appropriate flags. + +After finishing the test execution, the corresponding script will remove all +created resources in OpenStack (image, instances, network and security group). +When troubleshooting, it is handy sometimes to keep those resources in case the +test fails and a manual testing is needed. This can be achieved by adding the flag *-n*:: + + $repos_dir/functest/docker/run_tests.sh -n -t vping_ssh + $repos_dir/functest/docker/run_tests.sh -n -t vping_userdata + + +Some of the common errors that can appear in this test case are:: + + vPing_ssh- ERROR - There has been a problem when creating the neutron network.... + +This means that there has been some problems with Neutron, even before creating the +instances. Try to create manually a Neutron network and a Subnet to see if that works. +The debug messages will also help to see when it failed (subnet and router creation). +Example of Neutron commands (using 10.6.0.0/24 range for example):: + + neutron net-create net-test + neutron subnet-create --name subnet-test --allocation-pool start=10.6.0.2,end=10.6.0.100 --gateway 10.6.0.254 net-test 10.6.0.0/24 + neutron router-create test_router + neutron router-interface-add <ROUTER_ID> test_subnet + neutron router-gateway-set <ROUTER_ID> <EXT_NET_NAME> + +Another related error can occur while creating the Security Groups for the instances:: + + vPing_ssh- ERROR - Failed to create the security group... + +In this case, proceed to create it manually. These are some hints:: + + neutron security-group-create sg-test + neutron security-group-rule-create sg-test --direction ingress --protocol icmp --remote-ip-prefix 0.0.0.0/0 + neutron security-group-rule-create sg-test --direction ingress --ethertype IPv4 --protocol tcp --port-range-min 80 --port-range-max 80 --remote-ip-prefix 0.0.0.0/0 + neutron security-group-rule-create sg-test --direction egress --ethertype IPv4 --protocol tcp --port-range-min 80 --port-range-max 80 --remote-ip-prefix 0.0.0.0/0 + +The next step is to create the instances. The image used is located in +*/home/opnfv/functest/data/cirros-0.3.4-x86_64-disk.img* and a glance image is created +with the name *functest-vping*. If booting the instances fails (i.e. the status +is not **ACTIVE**), you can check why it failed by doing:: + + nova list + nova show <INSTANCE_ID> + +It might show some messages about the booting failure. To try that manually:: + + net_id=$(neutron net-list | grep net-test | awk '{print $2}') + nova boot --flavor 2 --image functest-vping --nic net-id=$net_id nova-test + +This will spawn a VM using the network created previously manually. If you want to use +the existing vPing network, just replace *net-test* by *vping-net*. +In all the OPNFV tested scenarios from CI, it never has been a problem with the +previous actions. Further possible problems are explained in the following sections. + + vPing_SSH ^^^^^^^^^ +This test case creates a floating IP on the external network and assigns it to +the second instance with name *opnfv-vping-2*. The purpose of this is to establish +a SSH connection to that instance to SCP a script that will ping the first insntace. +This script is located in the repository under +*$repos_dir/functest/testcases/vPing/CI/libraries/ping.sh* and takes an IP as +a parameter. When the SCP is completed, the test will do an SSH call to that script +inside the second instance. Some problems can happen here:: + + vPing_ssh- ERROR - Cannot establish connection to IP xxx.xxx.xxx.xxx. Aborting + +If this is displayed, stop the test or wait for it to finish (if you have used the flag +*-n* in *run_tests.sh* explained previously) so that the test does not clean +the OpenStack resources. It means that the Container can not reach the public +IP assigned to the instance *opnfv-vping-2*. There are many possible reasons, and +they really depend on the chosen scenario. For most of the ODL-L3 and ONOS scenarios +this has been noticed and it is a known limitation. + +First, make sure that the instance *opnfv-vping-2* managed to get an IP from +the DHCP agent. It can be checked by doing:: + + nova console-log opnfv-vping-2 + +If the message *Sending discover* and *No lease, failing* is shown, it probably +means that the Neutron dhcp-agent failed to assign an IP or even that it was not +responding. At this point it does not make sense to try to ping the floating IP. + +If the instance got an IP properly, try to ping manually the VM from the container:: + + nova list + <grab the public IP> + ping <public IP> + +If the ping does not return anything, try to ping from the Host where the Docker +container is running. If that solves the problem, check the iptable rules because +there might be some rules rejecting ICMP or TCP traffic coming/going from/to the container. + +At this point, if the ping does not work either, try to reproduce the test +manually with the steps described above in the vPing common section with the addition:: + + neutron floatingip-create <EXT_NET_NAME> + nova floating-ip-associate nova-test <FLOATING_IP> + + +Further troubleshooting is out of scope of this document, as it might be due to +problems with the SDN controller. Contact the installer team members. -vPing should work on all the scenarios. In case of timeout, check your network -connectivity. The test case creates its own security group to allow SSH access, -check your network settings and your security rules. vPing_userdata ^^^^^^^^^^^^^^ +This test case does not create any floating IP neither establishes an SSH +connection. Instead, it uses nova-metadata service when creating an instance +to pass the same script as before (ping.sh) but as 1-line text. This script +will be executed automatically when the second instance *opnfv-vping-2* is booted. + +The only known problem here for this test to fail is mainly the lack of support +of cloud-init (nova-metadata service). Check the console of the instance:: + + nova console-log opnfv-vping-2 + +If this text or similar is showed:: + + checking http://169.254.169.254/2009-04-04/instance-id + failed 1/20: up 1.13. request failed + failed 2/20: up 13.18. request failed + failed 3/20: up 25.20. request failed + failed 4/20: up 37.23. request failed + failed 5/20: up 49.25. request failed + failed 6/20: up 61.27. request failed + failed 7/20: up 73.29. request failed + failed 8/20: up 85.32. request failed + failed 9/20: up 97.34. request failed + failed 10/20: up 109.36. request failed + failed 11/20: up 121.38. request failed + failed 12/20: up 133.40. request failed + failed 13/20: up 145.43. request failed + failed 14/20: up 157.45. request failed + failed 15/20: up 169.48. request failed + failed 16/20: up 181.50. request failed + failed 17/20: up 193.52. request failed + failed 18/20: up 205.54. request failed + failed 19/20: up 217.56. request failed + failed 20/20: up 229.58. request failed + failed to read iid from metadata. tried 20 + +it means that the instance failed to read from the metadata service. Contact +the installer team members for more information. + +Cloud-init in not supported on scenario dealing with ONOS and the tests have been +excluded from CI in those scenarios. -Cloud-init in not supported on scenario dealing with ONOS. Tempest ^^^^^^^ |