❇️ Make the default configuration cluster ready
This changes the default configuration to be better prepared for usage with container management platforms, such as Docker Swarm, Kubernetes or OpenShift. Closes #27.
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Christian Mäder
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8 changed files with 257 additions and 68 deletions
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README.md
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README.md
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@ -1,13 +1,16 @@
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# netbox-docker
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[](https://travis-ci.org/ninech/netbox-docker)
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[][travis]
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This repository houses the components needed to build NetBox as a Docker container.
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Images built using this code are released to [Docker Hub](https://hub.docker.com/r/ninech/netbox) every night.
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This repository houses the components needed to build Netbox as a Docker container.
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Images built using this code are released to [Docker Hub][netbox-dockerhub] every night.
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[travis]: https://travis-ci.org/ninech/netbox-docker
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[netbox-dockerhub]: https://hub.docker.com/r/ninech/netbox/tags/
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## Quickstart
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To get NetBox up and running:
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To get Netbox up and running:
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```
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$ git clone -b master https://github.com/ninech/netbox-docker.git
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@ -30,7 +33,7 @@ $ open "http://$(docker-compose port nginx 80)/"
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$ xdg-open "http://$(docker-compose port nginx 80)/" &>/dev/null &
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```
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Alternatively, use something like [Reception](https://github.com/ninech/reception) to
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Alternatively, use something like [Reception][docker-reception] to
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connect to _docker-compose_ projects.
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Default credentials:
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@ -39,6 +42,8 @@ Default credentials:
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* Password: **admin**
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* API Token: **0123456789abcdef0123456789abcdef01234567**
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[docker-reception]: https://github.com/ninech/reception
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## Dependencies
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This project relies only on *Docker* and *docker-compose* meeting this requirements:
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@ -51,13 +56,74 @@ To ensure this, compare the output of `docker --version` and `docker-compose --v
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## Configuration
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You can configure the app using environment variables. These are defined in `netbox.env`.
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Read [Environment Variables in Compose][compose-env] to understand about the various possibilities to overwrite these variables.
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(The easiest solution being simply adjusting that file.)
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To find all possible variables, have a look at the [configuration.docker.py][docker-config] and [docker-entrypoint.sh][entrypoint] files.
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Generally, the environment variables are called the same as their respective Netbox configuration variables.
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Variables which are arrays are usually composed by putting all the values into the same environment variables with the values separated by a whitespace ("` `").
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For example defining `ALLOWED_HOSTS=localhost ::1 127.0.0.1` would allows access to Netbox through `http://localhost`, `http://[::1]` and `http://127.0.0.1`.
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[compose-env]: https://docs.docker.com/compose/environment-variables/
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### Production
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The default settings are optimized for (local) development environments.
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You should therefore adjust the configuration for production setups, at least the following variables:
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* `ALLOWED_HOSTS`: Add all URLs that lead to your netbox instance.
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* `DB_*`: Use a persistent database.
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* `EMAIL_*`: Use your own mailserver.
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* `MAX_PAGE_SIZE`: Use the recommended default of 1000.
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* `SUPERUSER_*`: Only define those variables during the initial setup, and drop them once the DB is set up.
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### Running on Docker Swarm / Kubernetes / OpenShift
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You may run this image in a cluster such as Docker Swarm, Kubernetes or OpenShift, but this is advanced level.
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In this case, we encourage you to statically configure Netbox by starting from [Netbox's example config file][default-config], and mounting it into your container using the mechanism provided by your container platform (i.e. [Docker Swarm configs][swarm-config], [Kubernetes secrets][k8s-secrets], [OpenShift configmaps][openshift-config]).
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But if you rather continue to configure your application through environment variables, you may continue to use [the built-in configuration file][docker-config].
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We discourage storing secrets in environment variables, as environment variable are passed on to all sub-processes and may leak easily into other systems, e.g. error collecting tools that often collect all environment variables whenever an error occurs.
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Therefore we *strongly advise* to make use of the secrets mechanism provided by your container platform (i.e. [Docker Swarm secrets][swarm-secrets], [Kubernetes secrets][k8s-secrets], [OpenShift secrets][openshift-secrets]).
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[The configuration file][docker-config] and [the entrypoint script][entrypoint] try to load the following secrets from the respective files.
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If a secret is defined by an environment variable and in the respective file at the same time, then the value from the environment variable is used.
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* `SUPERUSER_PASSWORD`: `/run/secrets/superuser_password`
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* `SUPERUSER_API_TOKEN`: `/run/secrets/superuser_api_token`
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* `DB_PASSWORD`: `/run/secrets/db_password`
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* `SECRET_KEY`: `/run/secrets/secret_key`
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* `EMAIL_PASSWORD`: `/run/secrets/email_password`
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* `NAPALM_PASSWORD`: `/run/secrets/napalm_password`
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Please also consider [the advice about running Netbox in production](#production) above!
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[docker-config]: https://github.com/ninech/netbox-docker/blob/master/docker/configuration.docker.py
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[default-config]: https://github.com/digitalocean/netbox/blob/develop/netbox/netbox/configuration.example.py
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[entrypoint]: https://github.com/ninech/netbox-docker/blob/master/docker/docker-entrypoint.sh
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[swarm-config]: https://docs.docker.com/engine/swarm/configs/
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[swarm-secrets]: https://docs.docker.com/engine/swarm/secrets/
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[openshift-config]: https://docs.openshift.org/latest/dev_guide/configmaps.html
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[openshift-secrets]: https://docs.openshift.org/latest/dev_guide/secrets.html
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[k8s-secrets]: https://kubernetes.io/docs/concepts/configuration/secret/
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#### A Note On OpenShift
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OpenShift usually is configured with specific restriction regarding root users.
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[Special care][openshift-root] has to be taken when building images for OpenShift.
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The Docker Image that may be built using this project (and which is available on Docker Hub) might not yet run without further customization on OpenShift.
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If you have this running on OpenShift, it would be nice if you could open a PR with the changes you needed to make.
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Or if you didn't do any changes and it just worked, that you could confirm this so that we can remove this notice.
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[openshift-root]: https://docs.openshift.org/latest/creating_images/guidelines.html#openshift-specific-guidelines
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## Version
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The `docker-compose.yml` file is prepared to run a specific version of Netbox.
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To use this feature, set the environment-variable `VERSION` before launching `docker-compose`, as shown below.
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`VERSION` may be set to the name of
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[any tag of the `ninech/netbox` Docker image](https://hub.docker.com/r/ninech/netbox/tags/).
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[any tag of the `ninech/netbox` Docker image on Docker Hub][netbox-dockerhub].
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```
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$ export VERSION=v2.2.6
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@ -66,9 +132,8 @@ $ docker-compose up -d
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```
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You can also build a specific version of the Netbox image. This time, `VERSION` indicates any valid
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[Git Reference](https://git-scm.com/book/en/v2/Git-Internals-Git-References) declared on
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[the Netbox Github repository](https://github.com/digitalocean/netbox/releases).
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Most commonly you will specify a tag name or a branch name.
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[Git Reference][git-ref] declared on [the 'digitalocean/netbox' Github repository][netbox-github].
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Most commonly you will specify a tag or branch name.
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```
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$ export VERSION=develop
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@ -79,6 +144,47 @@ $ docker-compose up -d
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Hint: If you're building a specific version by tag name, the `--no-cache` argument is not strictly necessary.
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This can increase the build speed if you're just adjusting the config, for example.
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[git-ref]: https://git-scm.com/book/en/v2/Git-Internals-Git-References
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[netbox-github]: https://github.com/digitalocean/netbox/releases
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## Troubleshooting
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This section is a collection of some common issues and how to resolve them.
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If your issue is not here, look through [the existing issues][issues] and eventually create a new issue.
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[issues]: (https://github.com/ninech/netbox-docker/issues)
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### Docker Compose basics
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* You can see all running containers belonging to this project using `docker-compose ps`.
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* You can see the logs by running `docker-compose logs -f`.
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Running `docker-compose logs -f netbox` will just show the logs for netbox.
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* You can stop everything using `docker-compose stop`.
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* You can clean up everything using `docker-compose down -v --remove-orphans`. **This will also remove any related data.**
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* You can enter the shell of the running Netbox container using `docker-compose exec netbox /bin/bash`. Now you have access to `./manage.py`, e.g. to reset a password.
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* To access the database run `docker-compose exec postgres sh -c 'psql -U $POSTGRES_USER $POSTGRES_DB'`
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* To create a database backup run `docker-compose exec postgres sh -c 'pg_dump -U $POSTGRES_USER $POSTGRES_DB' | gzip > db_dump.sql.gz`
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* To restore that database backup run `gunzip -c db_dump.sql.gz | docker exec -i $(docker-compose ps -q postgres) sh -c 'psql -U $POSTGRES_USER $POSTGRES_DB'`.
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### Getting a "Bad Request (400)"
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> When connecting to the Netbox instance, I get a "Bad Request (400)" error.
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This usually happens when the `ALLOWED_HOSTS` variable is not set correctly.
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### How to upgrade
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> How do I update to a newer version?
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It should be sufficient to pull the latest image from Docker Hub, stopping the container and starting it up again:
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```bash
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docker-compose pull netbox
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docker-compose stop netbox
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docker-compose rm -f netbox
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docker-compose up -d netbox
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```
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## Rebuilding & Publishing images
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`./build.sh` is used to rebuild the Docker image:
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@ -104,7 +210,7 @@ You can use the following ENV variables to customize the build:
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## Tests
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To run the bundled test, use the `docker-compose.test.yml` file.
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To run the test coming with Netbox, use the `docker-compose.test.yml` file as such:
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```
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$ docker-compose -f docker-compose.test.yml run --rm app
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