kolla-ansible/doc/source/user/troubleshooting.rst

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.

Note

In some countries like China, Kolla might fail due to unable to pull images from Docker Hub. There is a workround to solve this issue:

mkdir -p /etc/docker
tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://registry.docker-cn.com"]
}
EOF
systemctl restart docker

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:

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 <<inventory-file>>

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 fluentd 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 <container-name>

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.

The log volume "kolla_logs" is linked to /var/log/kolla on the host. You can find all kolla logs in there.

readlink -f /var/log/kolla
/var/lib/docker/volumes/kolla_logs/_data

When enable_central_logging is enabled, to view the logs in a web browser using Kibana, go to http://<kolla_internal_vip_address>:<kibana_server_port> or http://<kolla_external_vip_address>:<kibana_server_port>. Authenticate using <kibana_user> and <kibana_password>.

The values <kolla_internal_vip_address>, <kolla_external_vip_address> <kibana_server_port> and <kibana_user> can be found in <kolla_install_path>/kolla/ansible/group_vars/all.yml or if the default values are overridden, in /etc/kolla/globals.yml. The value of <kibana_password> can be found in /etc/kolla/passwords.yml.