289 lines
12 KiB
Markdown
289 lines
12 KiB
Markdown
# 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][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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```
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$ git clone -b master https://github.com/ninech/netbox-docker.git
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$ cd netbox-docker
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$ docker-compose pull
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$ docker-compose up -d
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```
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The application will be available after a few minutes.
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Use `docker-compose port nginx 8080` to find out where to connect to.
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```
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$ echo "http://$(docker-compose port nginx 8080)/"
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http://0.0.0.0:32768/
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# Open netbox in your default browser on macOS:
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$ open "http://$(docker-compose port nginx 8080)/"
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# Open netbox in your default browser on (most) linuxes:
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$ xdg-open "http://$(docker-compose port nginx 8080)/" &>/dev/null &
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```
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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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* Username: **admin**
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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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* The *Docker version* must be at least `1.13.0`.
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* The *docker-compose version* must be at least `1.10.0`.
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To ensure this, compare the output of `docker --version` and `docker-compose --version` with the requirements above.
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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:8080`, `http://[::1]:8080` and `http://127.0.0.1:8080`.
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[compose-env]: https://docs.docker.com/compose/environment-variables/
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### Custom Initialization Code (e.g. Automatically Setting Up Custom Fields)
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When using `docker-compose`, all the python scripts present in `/opt/netbox/startup_scripts` will automatically be executed after the application boots in the context of `./manage.py`.
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That mechanism can be used for many things, e.g. to create Netbox custom fields:
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```python
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# docker/startup_scripts/load_custom_fields.py
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from django.contrib.contenttypes.models import ContentType
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from extras.models import CF_TYPE_TEXT, CustomField
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from dcim.models import Device
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from dcim.models import DeviceType
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device = ContentType.objects.get_for_model(Device)
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device_type = ContentType.objects.get_for_model(DeviceType)
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my_custom_field, created = CustomField.objects.get_or_create(
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type=CF_TYPE_TEXT,
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name='my_custom_field',
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description='My own custom field'
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)
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if created:
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my_custom_field.obj_type.add(device)
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my_custom_field.obj_type.add(device_type)
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```
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#### Initializers
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Initializers are built-in startup scripts for defining Netbox custom fields, groups and users.
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All you need to do is to mount you own `initializers` folder ([see `docker-compose.yml`][netbox-docker-compose]).
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Look at the [`initializers` folder][netbox-docker-initializers] to learn how the files must look like.
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Here's an example for defining a custom field:
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```yaml
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# initializers/custom_fields.yml
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text_field:
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type: text
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label: Custom Text
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description: Enter text in a text field.
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required: false
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filterable: true
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weight: 0
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on_objects:
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- dcim.models.Device
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- dcim.models.Rack
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- ipam.models.IPAddress
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- ipam.models.Prefix
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- tenancy.models.Tenant
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- virtualization.models.VirtualMachine
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```
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[netbox-docker-initializers]: https://github.com/ninech/netbox-docker/tree/master/initializers
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[netbox-docker-compose]: https://github.com/ninech/netbox-docker/blob/master/docker-compose.yml
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#### Custom Docker Image
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You can also build your own Netbox Docker image containing your own startup scripts, custom fields, users and groups
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like this:
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```
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ARG VERSION=latest
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FROM ninech/netbox:$VERSION
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COPY startup_scripts/ /opt/netbox/startup_scripts/
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COPY initializers/ /opt/netbox/initializers/
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```
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#### LDAP enabled variant
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In the images tagged with "-ldap" you can authenticate netbox against an LDAP / AD server. The included ldap_config.py is configured to use an AD domain controller. The custom values can be injected with environment variables like those in the main configuration file.
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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 in the directory `/etc/netbox/` using the mechanism provided by your container platform (i.e. [Docker Swarm configs][swarm-config], [Kubernetes ConfigMap][k8s-config], [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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[k8s-config]: https://kubernetes.io/docs/tasks/configure-pod-container/configure-pod-configmap/
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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 on Docker Hub][netbox-dockerhub].
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```
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$ export VERSION=v2.2.6
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$ docker-compose pull netbox
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$ 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][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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$ docker-compose build --no-cache netbox
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$ docker-compose up -d
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```
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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 -cU $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 $POSTGRES_DB'`.
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### Getting a "Bad Request (400)"
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> When connecting to the Netbox instance, I get a "Bad Request (400)" error.
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This usually happens when the `ALLOWED_HOSTS` variable is not set correctly.
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### How to upgrade
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> How do I update to a newer version?
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It should be sufficient to pull the latest image from Docker Hub, stopping the container and starting it up again:
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```bash
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docker-compose pull netbox
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docker-compose stop netbox
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docker-compose rm -f netbox
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docker-compose up -d netbox
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```
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## Rebuilding & Publishing images
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`./build.sh` is used to rebuild the Docker image:
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```
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$ ./build.sh --help
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Usage: ./build.sh <branch> [--push]
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branch The branch or tag to build. Required.
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--push Pushes built Docker image to docker hub.
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You can use the following ENV variables to customize the build:
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BRANCH The branch to build.
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Also used for tagging the image.
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DOCKER_REPO The Docker registry (i.e. hub.docker.com/r/DOCKER_REPO/netbox)
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Also used for tagging the image.
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Default: ninech
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SRC_REPO Which fork of netbox to use (i.e. github.com/<SRC_REPO>/netbox).
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Default: digitalocean
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URL Where to fetch the package from.
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Must be a tar.gz file of the source code.
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Default: https://github.com/${SRC_REPO}/netbox/archive/$BRANCH.tar.gz
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```
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## Tests
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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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```
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## About
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This repository is currently maintained and funded by [nine](https://nine.ch), your cloud navigator.
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[](https://www.nine.ch)
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