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# Install netdata with Docker
> :warning: As of Sep 9th, 2018 we ship [new docker builds](https://github.com/netdata/netdata/pull/3995), running netdata in docker with an [ENTRYPOINT](https://docs.docker.com/engine/reference/builder/#entrypoint) directive, not a COMMAND directive. Please adapt your execution scripts accordingly. You can find more information about ENTRYPOINT vs COMMAND is presented by goinbigdata [here](http://goinbigdata.com/docker-run-vs-cmd-vs-entrypoint/) and by docker docs [here](https://docs.docker.com/engine/reference/builder/#understand-how-cmd-and-entrypoint-interact).
>
> Also, the `latest` is now based on alpine, so **`alpine` is not updated any more** and `armv7hf` is now replaced with `armhf` (to comply with https://github.com/multiarch naming), so **`armv7hf` is not updated** either.
## Limitations
Running netdata in a container for monitoring the whole host, can limit its capabilities. Some data is not accessible or not as detailed as when running netdata on the host.
## Package scrambling in runtime (x86_64 only)
By default on x86_64 architecture our docker images use Polymorphic Polyverse Linux package scrambling. For increased security you can enable rescrambling of packages during runtime. To do this set environment variable `RESCRAMBLE=true` while starting netdata docker container.
For more information go to [Polyverse site](https://polyverse.io/how-it-works/)
## Run netdata with docker command
Quickly start netdata with the docker command line.
Netdata is then available at http://host:19999
This is good for an internal network or to quickly analyse a host.
```bash
docker run -d --name=netdata \
-p 19999:19999 \
-v /proc:/host/proc:ro \
-v /sys:/host/sys:ro \
-v /var/run/docker.sock:/var/run/docker.sock:ro \
--cap-add SYS_PTRACE \
--security-opt apparmor=unconfined \
netdata/netdata
```
The above can be converted to docker-compose file for ease of management:
```yaml
version: '3'
services:
netdata:
image: netdata/netdata
hostname: example.com # set to fqdn of host
ports:
- 19999:19999
cap_add:
- SYS_PTRACE
security_opt:
- apparmor:unconfined
volumes:
- /proc:/host/proc:ro
- /sys:/host/sys:ro
- /var/run/docker.sock:/var/run/docker.sock:ro
```
### Docker container names resolution
If you want to have your container names resolved by netdata it needs to have access to docker group. To achive that just add environment variable `PGID=999` to netdata container, where `999` is a docker group id from your host. This number can be found by running:
```bash
grep docker /etc/group | cut -d ':' -f 3
```
### Pass command line options to Netdata
Since we use an [ENTRYPOINT](https://docs.docker.com/engine/reference/builder/#entrypoint) directive, you can provide [netdata daemon command line options](https://docs.netdata.cloud/daemon/#command-line-options) such as the IP address netdata will be running on, using the [command instruction](https://docs.docker.com/engine/reference/builder/#cmd).
## Install Netdata using Docker Compose with SSL/TLS enabled http proxy
For a permanent installation on a public server, you should [secure the netdata instance](../../docs/netdata-security.md). This section contains an example of how to install netdata with an SSL reverse proxy and basic authentication.
You can use use the following docker-compose.yml and Caddyfile files to run netdata with docker. Replace the Domains and email address for [Letsencrypt](https://letsencrypt.org/) before starting.
### Prerequisites
* [Docker](https://docs.docker.com/install/#server)
* [Docker Compose](https://docs.docker.com/compose/install/)
* Domain configured in DNS pointing to host.
### Caddyfile
This file needs to be placed in /opt with name `Caddyfile`. Here you customize your domain and you need to provide your email address to obtain a Letsencrypt certificate. Certificate renewal will happen automatically and will be executed internally by the caddy server.
```
netdata.example.org {
proxy / netdata:19999
tls admin@example.org
}
```
### docker-compose.yml
After setting Caddyfile run this with `docker-compose up -d` to have fully functioning netdata setup behind HTTP reverse proxy.
```yaml
version: '3'
volumes:
caddy:
services:
caddy:
image: abiosoft/caddy
ports:
- 80:80
- 443:443
volumes:
- /opt/Caddyfile:/etc/Caddyfile
- caddy:/root/.caddy
environment:
ACME_AGREE: 'true'
netdata:
restart: always
hostname: netdata.example.org
image: netdata/netdata
cap_add:
- SYS_PTRACE
security_opt:
- apparmor:unconfined
volumes:
- /proc:/host/proc:ro
- /sys:/host/sys:ro
- /var/run/docker.sock:/var/run/docker.sock:ro
```
### Restrict access with basic auth
You can restrict access by following [official caddy guide](https://caddyserver.com/docs/basicauth) and adding lines to Caddyfile.
[]()
### Publish a test image to your own repository
The script `packaging/docker/build-test.sh` can be used to create an image and upload it to a repository of your choosing.
```
Usage: packaging/docker/build-test.sh -r <REPOSITORY> -v <VERSION> -u <DOCKER_USERNAME> -p <DOCKER_PASSWORD> [-s]
-s skip build, just push the image
Builds an amd64 image and pushes it to the docker hub repository REPOSITORY
```
This is especially useful when testing a Pull Request for Kubernetes, since you can set `image` to an immutable repository and tag, set the `imagePullPolicy` to `Always` and just keep uploading new images.
Example:
We get a local copy of the Helm chart at https://github.com/netdata/helmchart. We modify `values.yaml` to have the following:
```
image:
repository: cakrit/netdata-prs
tag: PR5576
pullPolicy: Always
```
We check out PR5576 and run the following:
```
./packaging/docker/build-test.sh -r cakrit/netdata-prs -v PR5576 -u cakrit -p 'XXX'
```
Then we can run `helm install [path to our helmchart clone]`.
If we make changes to the code, we execute the same `build-test.sh` command, followed by `helm upgrade [name] [path to our helmchart clone]`
|
