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diff --git a/docs/release/installation/troubleshooting.rst b/docs/release/installation/troubleshooting.rst new file mode 100644 index 00000000..ed0d1ff6 --- /dev/null +++ b/docs/release/installation/troubleshooting.rst @@ -0,0 +1,144 @@ +Developer Guide and Troubleshooting +=================================== + +This section aims to explain in more detail the steps that Apex follows +to make a deployment. It also tries to explain possible issues you might find +in the process of building or deploying an environment. + +After installing the Apex RPMs in the jumphost, some files will be located +around the system. + +1. /etc/opnfv-apex: this directory contains a bunch of scenarios to be + deployed with different characteristics such HA (High Availability), SDN + controller integration (OpenDaylight/ONOS), BGPVPN, FDIO, etc. Having a + look at any of these files will give you an idea of how to make a + customized scenario setting up different flags. + +2. /usr/bin/: it contains the binaries for the commands opnfv-deploy, + opnfv-clean and opnfv-util. + +3. /var/opt/opnfv/: it contains several files and directories. + + 3.1. images/: this folder contains the images that will be deployed + according to the chosen scenario. + + 3.2. lib/: bunch of scripts that will be executed in the different phases + of deployment. + + +Utilization of Images +--------------------- + +As mentioned earlier in this guide, the Undercloud VM will be in charge of +deploying OPNFV (Overcloud VMs). Since the Undercloud is an all-in-one +OpenStack deployment, it will use Glance to manage the images that will be +deployed as the Overcloud. + +So whatever customization that is done to the images located in the jumpserver +(/var/opt/opnfv/images) will be uploaded to the undercloud and consequently, to +the overcloud. + +Make sure, the customization is performed on the right image. For example, if I +virt-customize the following image overcloud-full-opendaylight.qcow2, but then +I deploy OPNFV with the following command: + + ``sudo opnfv-deploy -n network_settings.yaml -d + /etc/opnfv-apex/os-onos-nofeature-ha.yaml`` + +It will not have any effect over the deployment, since the customized image is +the opendaylight one, and the scenario indicates that the image to be deployed +is the overcloud-full-onos.qcow2. + + +Post-deployment Configuration +----------------------------- + +Post-deployment scripts will perform some configuration tasks such ssh-key +injection, network configuration, NATing, OpenVswitch creation. It will take +care of some OpenStack tasks such creation of endpoints, external networks, +users, projects, etc. + +If any of these steps fail, the execution will be interrupted. In some cases, +the interruption occurs at very early stages, so a new deployment must be +executed. However, some other cases it could be worth it to try to debug it. + + 1. There is not external connectivity from the overcloud nodes: + + Post-deployment scripts will configure the routing, nameservers + and a bunch of other things between the overcloud and the + undercloud. If local connectivity, like pinging between the + different nodes, is working fine, script must have failed when + configuring the NAT via iptables. The main rules to enable + external connectivity would look like these: + + ``iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE`` + ``iptables -t nat -A POSTROUTING -s ${external_cidr} -o eth0 -j + MASQUERADE`` + ``iptables -A FORWARD -i eth2 -j ACCEPT`` + ``iptables -A FORWARD -s ${external_cidr} -m state --state + ESTABLISHED,RELATED -j ACCEPT`` + ``service iptables save`` + + These rules must be executed as root (or sudo) in the + undercloud machine. + +OpenDaylight Integration +------------------------ + +When a user deploys any of the following scenarios: + + - os-odl-bgpvpn-ha.yaml + - os-odl_l2-fdio-ha.yaml + - os-odl_l2-fdio-noha.yaml + - os-odl_l2-nofeature-ha.yaml + - os-odl_l2-sfc-noha.yaml + - os-odl_l3-nofeature-ha.yaml + +OpenDaylight (ODL) SDN controller will be deployed too and completely +integrated with OpenStack. ODL is running as a systemd service, so you can +manage it as a regular service: + + ``systemctl start/restart/stop opendaylight.service`` + +This command must be executed as root in the controller node of the overcloud, +where OpenDaylight is running. ODL files are located in /opt/opendaylight. ODL +uses karaf as a Java container management system that allows the users to +install new features, check logs and configure a lot of things. In order to +connect to Karaf's console, use the following command: + + ``opnfv-util opendaylight`` + +This command is very easy to use, but in case it is not connecting to Karaf, +this is the command that is executing underneath: + + ``ssh -p 8101 -o UserKnownHostsFile=/dev/null -o + StrictHostKeyChecking=no karaf@localhost`` + +Of course, localhost when the command is executed in the overcloud controller, +but you use its public IP to connect from elsewhere. + +Debugging Failures +------------------ + +This section will try to gather different type of failures, the root cause and +some possible solutions or workarounds to get the process continued. + +1. I can see in the output log a post-deployment error messages: + + Heat resources will apply puppet manifests during this phase. If one of + these processes fail, you could try to see the error and after that, + re-run puppet to apply that manifest. Log into the controller (see + verification section for that) and check as root /var/log/messages. + Search for the error you have encountered and see if you can fix it. In + order to re-run the puppet manifest, search for "puppet apply" in that + same log. You will have to run the last "puppet apply" before the + error. And It should look like this: + + ``FACTER_heat_outputs_path="/var/run/heat-config/heat-config-puppet/5b4c7a01-0d63-4a71-81e9-d5ee6f0a1f2f" FACTER_fqdn="overcloud-controller-0.localdomain.com" \ + FACTER_deploy_config_name="ControllerOvercloudServicesDeployment_Step4" puppet apply --detailed-exitcodes -l syslog -l console \ + /var/lib/heat-config/heat-config-puppet/5b4c7a01-0d63-4a71-81e9-d5ee6f0a1f2f.pp`` + + As a comment, Heat will trigger the puppet run via os-apply-config and + it will pass a different value for step each time. There is a total of + five steps. Some of these steps will not be executed depending on the + type of scenario that is being deployed. |