.. troubleshooting: ===================== Troubleshooting Guide ===================== Failures ======== If Kolla fails, often it is caused by a CTRL-C during the deployment process or a problem in the ``globals.yml`` configuration. To correct the problem where Operators have a misconfigured environment, the Kolla community has added a precheck feature which ensures the deployment targets are in a state where Kolla may deploy to them. To run the prechecks, execute: :: kolla-ansible prechecks If a failure during deployment occurs it nearly always occurs during evaluation of the software. Once the Operator learns the few configuration options required, it is highly unlikely they will experience a failure in deployment. Deployment may be run as many times as desired, but if a failure in a bootstrap task occurs, a further deploy action will not correct the problem. In this scenario, Kolla's behavior is undefined. The fastest way during to recover from a deployment failure is to remove the failed deployment: :: kolla-ansible destroy -i <> Any time the tags of a release change, it is possible that the container implementation from older versions won't match the Ansible playbooks in a new version. If running multinode from a registry, each node's Docker image cache must be refreshed with the latest images before a new deployment can occur. To refresh the docker cache from the local Docker registry: :: kolla-ansible pull Debugging Kolla =============== The status of containers after deployment can be determined on the deployment targets by executing: :: docker ps -a If any of the containers exited, this indicates a bug in the container. Please seek help by filing a `launchpad bug`_ or contacting the developers via IRC. The logs can be examined by executing: :: docker exec -it heka bash The logs from all services in all containers may be read from ``/var/log/kolla/SERVICE_NAME`` If the stdout logs are needed, please run: :: docker logs Note that most of the containers don't log to stdout so the above command will provide no information. To learn more about Docker command line operation please refer to `Docker documentation `__. When ``enable_central_logging`` is enabled, to view the logs in a web browser using Kibana, go to: :: http://: or http://: and authenticate using ```` and ````. The values ````, ```` ```` and ```` can be found in ``/kolla/ansible/group_vars/all.yml`` or if the default values are overridden, in ``/etc/kolla/globals.yml``. The value of ```` can be found in ``/etc/kolla/passwords.yml``. .. note:: When you log in to Kibana web interface for the first time, you are prompted to create an index. Please create an index using the name ``log-*``. This step is necessary until the default Kibana dashboard is implemented in Kolla. .. _launchpad bug: https://bugs.launchpad.net/kolla-ansible/+filebug