netbox-docker/README.md

netbox-docker

This repository houses the components needed to build Netbox as a Docker container. Images built using this code are released to Docker Hub every night.

Quickstart

To get Netbox up and running:

$ git clone -b master https://github.com/ninech/netbox-docker.git
$ cd netbox-docker
$ docker-compose pull
$ docker-compose up -d

The application will be available after a few minutes. Use docker-compose port nginx 8080 to find out where to connect to.

$ echo "http://$(docker-compose port nginx 8080)/"
http://0.0.0.0:32768/

# Open netbox in your default browser on macOS:
$ open "http://$(docker-compose port nginx 8080)/"

# Open netbox in your default browser on (most) linuxes:
$ xdg-open "http://$(docker-compose port nginx 8080)/" &>/dev/null &

Alternatively, use something like Reception to connect to docker-compose projects.

Default credentials:

• Username: admin
• Password: admin
• API Token: 0123456789abcdef0123456789abcdef01234567

Dependencies

This project relies only on Docker and docker-compose meeting this requirements:

• The Docker version must be at least 1.13.0.
• The docker-compose version must be at least 1.10.0.

To ensure this, compare the output of docker --version and docker-compose --version with the requirements above.

Configuration

You can configure the app using environment variables. These are defined in netbox.env. Read Environment Variables in Compose to understand about the various possibilities to overwrite these variables. (The easiest solution being simply adjusting that file.)

To find all possible variables, have a look at the configuration.docker.py and docker-entrypoint.sh files. Generally, the environment variables are called the same as their respective Netbox configuration variables. Variables which are arrays are usually composed by putting all the values into the same environment variables with the values separated by a whitespace (" "). 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.

Custom Initialization Code (e.g. Automatically Setting Up Custom Fields)

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.

That mechanism can be used for many things, e.g. to create Netbox custom fields:

# docker/startup_scripts/load_custom_fields.py
from django.contrib.contenttypes.models import ContentType
from extras.models import CF_TYPE_TEXT, CustomField

from dcim.models import Device
from dcim.models import DeviceType

device      = ContentType.objects.get_for_model(Device)
device_type = ContentType.objects.get_for_model(DeviceType)

my_custom_field, created = CustomField.objects.get_or_create(
    type=CF_TYPE_TEXT,
    name='my_custom_field',
    description='My own custom field'
)

if created:
  my_custom_field.obj_type.add(device)
  my_custom_field.obj_type.add(device_type)

Initializers

Initializers are built-in startup scripts for defining Netbox custom fields, groups and users. All you need to do is to mount you own initializers folder (see docker-compose.yml). Look at the initializers folder to learn how the files must look like.

Here's an example for defining a custom field:

# initializers/custom_fields.yml
text_field:
  type: text
  label: Custom Text
  description: Enter text in a text field.
  required: false
  filterable: true
  weight: 0
  on_objects:
  - dcim.models.Device
  - dcim.models.Rack
  - ipam.models.IPAddress
  - ipam.models.Prefix
  - tenancy.models.Tenant
  - virtualization.models.VirtualMachine

Custom Docker Image

You can also build your own Netbox Docker image containing your own startup scripts, custom fields, users and groups like this:

ARG VERSION=latest
FROM ninech/netbox:$VERSION

COPY startup_scripts/ /opt/netbox/startup_scripts/
COPY initializers/ /opt/netbox/initializers/

Production

The default settings are optimized for (local) development environments. You should therefore adjust the configuration for production setups, at least the following variables:

• ALLOWED_HOSTS: Add all URLs that lead to your Netbox instance.
• DB_*: Use a persistent database.
• EMAIL_*: Use your own mailserver.
• MAX_PAGE_SIZE: Use the recommended default of 1000.
• SUPERUSER_*: Only define those variables during the initial setup, and drop them once the DB is set up.

Running on Docker Swarm / Kubernetes / OpenShift

You may run this image in a cluster such as Docker Swarm, Kubernetes or OpenShift, but this is advanced level.

In this case, we encourage you to statically configure Netbox by starting from Netbox's example config file, and mounting it into your container using the mechanism provided by your container platform (i.e. Docker Swarm configs, Kubernetes ConfigMap, OpenShift ConfigMaps).

But if you rather continue to configure your application through environment variables, you may continue to use the built-in configuration file. 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.

Therefore we strongly advise to make use of the secrets mechanism provided by your container platform (i.e. Docker Swarm secrets, Kubernetes secrets, OpenShift secrets). The configuration file and the entrypoint script try to load the following secrets from the respective files. 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.

• SUPERUSER_PASSWORD: /run/secrets/superuser_password
• SUPERUSER_API_TOKEN: /run/secrets/superuser_api_token
• DB_PASSWORD: /run/secrets/db_password
• SECRET_KEY: /run/secrets/secret_key
• EMAIL_PASSWORD: /run/secrets/email_password
• NAPALM_PASSWORD: /run/secrets/napalm_password

Please also consider the advice about running Netbox in production above!

A Note On OpenShift

OpenShift usually is configured with specific restrictions regarding root users. Special care has to be taken when building images for OpenShift. 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. If you have this running on OpenShift, it would be nice if you could open a PR with the changes you needed to make. Or if you didn't do any changes and it just worked, that you could confirm this so that we can remove this notice.

Version

The docker-compose.yml file is prepared to run a specific version of Netbox. To use this feature, set the environment-variable VERSION before launching docker-compose, as shown below. VERSION may be set to the name of any tag of the ninech/netbox Docker image on Docker Hub.

$ export VERSION=v2.2.6
$ docker-compose pull netbox
$ docker-compose up -d

You can also build a specific version of the Netbox image. This time, VERSION indicates any valid Git Reference declared on the 'digitalocean/netbox' Github repository. Most commonly you will specify a tag or branch name.

$ export VERSION=develop
$ docker-compose build --no-cache netbox
$ docker-compose up -d

Hint: If you're building a specific version by tag name, the --no-cache argument is not strictly necessary. This can increase the build speed if you're just adjusting the config, for example.

Troubleshooting

This section is a collection of some common issues and how to resolve them. If your issue is not here, look through the existing issues and eventually create a new issue.

Docker Compose basics

• You can see all running containers belonging to this project using docker-compose ps.
• You can see the logs by running docker-compose logs -f. Running docker-compose logs -f netbox will just show the logs for netbox.
• You can stop everything using docker-compose stop.
• You can clean up everything using docker-compose down -v --remove-orphans. This will also remove any related data.
• 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.
• To access the database run docker-compose exec postgres sh -c 'psql -U $POSTGRES_USER $POSTGRES_DB'
• To create a database backup run docker-compose exec postgres sh -c 'pg_dump -cU $POSTGRES_USER $POSTGRES_DB' | gzip > db_dump.sql.gz
• 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'.

Getting a "Bad Request (400)"

When connecting to the Netbox instance, I get a "Bad Request (400)" error.

This usually happens when the ALLOWED_HOSTS variable is not set correctly.

How to upgrade

How do I update to a newer version?

It should be sufficient to pull the latest image from Docker Hub, stopping the container and starting it up again:

docker-compose pull netbox
docker-compose stop netbox
docker-compose rm -f netbox
docker-compose up -d netbox

Rebuilding & Publishing images

./build.sh is used to rebuild the Docker image:

$ ./build.sh --help
Usage: ./build.sh <branch> [--push]
  branch  The branch or tag to build. Required.
  --push  Pushes built Docker image to docker hub.

You can use the following ENV variables to customize the build:
  BRANCH   The branch to build.
           Also used for tagging the image.
  DOCKER_REPO The Docker registry (i.e. hub.docker.com/r/DOCKER_REPO/netbox)
           Also used for tagging the image.
           Default: ninech
  SRC_REPO Which fork of netbox to use (i.e. github.com/<SRC_REPO>/netbox).
           Default: digitalocean
  URL      Where to fetch the package from.
           Must be a tar.gz file of the source code.
           Default: https://github.com/${SRC_REPO}/netbox/archive/$BRANCH.tar.gz

Tests

To run the test coming with Netbox, use the docker-compose.test.yml file as such:

$ docker-compose -f docker-compose.test.yml run --rm app

About

This repository is currently maintained and funded by nine, your cloud navigator.