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Updated docs in a proper format
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Thomas Boerger
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DOCS.md
136
DOCS.md
@ -1,26 +1,64 @@
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Use the Docker plugin to build and push Docker images to a registry. The following parameters are used to configure this plugin:
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Use the Docker plugin to build and push Docker images to a public or even a
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private registry.
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* `registry` - authenticates to this registry
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* `username` - authenticates with this username
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* `password` - authenticates with this password
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* `email` - authenticates with this email
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* `repo` - repository name for the image
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* `tag` - repository tag for the image
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* `file` - dockerfile to be used, defaults to Dockerfile
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* `context` - the context path to use, defaults to root of the git repo
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* `insecure` - enable insecure communication to this registry
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* `mirror` - use a mirror registry instead of pulling images directly from the central Hub
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* `bip` - use for pass bridge ip
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* `dns` - set custom dns servers for the container
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* `storage_driver` - use `aufs`, `devicemapper`, `btrfs` or `overlay` driver
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* `storage_path` - location of docker daemon storage on disk
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* `build_args` - [build arguments](https://docs.docker.com/engine/reference/commandline/build/#set-build-time-variables-build-arg) to pass to `docker build`
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* `mtu` - custom [mtu settings](https://docs.docker.com/v1.8/articles/networking/#docker0) when starting the docker daemon
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## Config
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The following is a sample Docker configuration in your .drone.yml file:
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The following parameters are used to configure the plugin:
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* **registry** - authenticates to this registry
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* **username** - authenticates with this username
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* **password** - authenticates with this password
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* **email** - authenticates with this email
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* **repo** - repository name for the image
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* **tag** - repository tag for the image
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* **file** - dockerfile to be used, defaults to Dockerfile
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* **context** - the context path to use, defaults to root of the git repo
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* **insecure** - enable insecure communication to this registry
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* **mirror** - use a mirror registry instead of pulling images directly from the central Hub
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* **bip** - use for pass bridge ip
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* **dns** - set custom dns servers for the container
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* **storage_driver** - use `aufs`, `devicemapper`, `btrfs` or `overlay` driver
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* **storage_path** - location of docker daemon storage on disk
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* **build_args** - [build arguments](https://docs.docker.com/engine/reference/commandline/build/#set-build-time-variables-build-arg) to pass to `docker build`
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* **mtu** - custom [mtu settings](https://docs.docker.com/v1.8/articles/networking/#docker0) when starting the docker daemon
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The following secret values can be set to configure the plugin.
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* **DOCKER_REGISTRY** - corresponds to **registry**
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* **DOCKER_USERNAME** - corresponds to **username**
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* **DOCKER_PASSWORD** - corresponds to **password**
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* **DOCKER_EMAIL** - corresponds to **email**
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It is highly recommended to put the **DOCKER_USERNAME**, **DOCKER_PASSWORD**
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and **DOCKER_EMAIL** into secrets so it is not exposed to users. This can be
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done using the drone-cli.
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```bash
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drone secret add --image=docker \
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octocat/hello-world DOCKER_USERNAME kevinbacon
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drone secret add --image=docker \
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octocat/hello-world DOCKER_PASSWORD pa55word
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drone secret add --image=docker \
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octocat/hello-world DOCKER_EMAIL kevin.bacon@mail.com
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```
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Then sign the YAML file after all secrets are added.
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```bash
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drone sign octocat/hello-world
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```
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See [secrets](http://readme.drone.io/0.5/usage/secrets/) for additional
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information on secrets
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## Examples
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Simple publishing of a docker container:
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```yaml
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publish:
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pipeline:
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docker:
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username: kevinbacon
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password: pa55word
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@ -34,22 +72,22 @@ publish:
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Publish and image with multiple tags:
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```yaml
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publish:
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pipeline:
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docker:
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username: kevinbacon
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password: pa55word
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email: kevin.bacon@mail.com
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repo: foo/bar
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tag:
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tags:
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- latest
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- 1.0.1
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- "1.0"
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```
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Build an image with arguments:
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Build an image with additional arguments:
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```yaml
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publish:
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pipeline:
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docker:
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username: kevinbacon
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password: pa55word
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@ -61,35 +99,43 @@ publish:
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## Caching
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The Drone build environment is, by default, ephemeral meaning that you layers are not saved between builds. There are two methods for caching your layers.
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The Drone build environment is, by default, ephemeral meaning that you layers
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are not saved between builds. There are two methods for caching your layers.
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### Graph directory caching
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This is the preferred method when using the `overlay` or `aufs` storage drivers. Just use Drone's caching feature to backup and restore the directory `/drone/docker`, as shown in the following example:
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This is the preferred method when using the `overlay` or `aufs` storage
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drivers. Just use Drone's caching feature to backup and restore the directory
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`/drone/docker`, as shown in the following example:
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```yaml
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publish:
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pipeline:
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sftp_cache:
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restore: true
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mount: /drone/docker
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docker:
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storage_path: /drone/docker
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username: kevinbacon
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password: pa55word
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email: kevin.bacon@mail.com
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repo: foo/bar
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tag:
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tags:
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- latest
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- "1.0.1"
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cache:
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mount:
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- /drone/docker
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sftp_cache:
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rebuild: true
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mount: /drone/docker
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```
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## Troubleshooting
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For detailed output you can set the `DOCKER_LAUNCH_DEBUG` environment variable in your plugin configuration. This starts Docker with verbose logging enabled.
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For detailed output you can set the `DOCKER_LAUNCH_DEBUG` environment variable
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in your plugin configuration. This starts Docker with verbose logging enabled.
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```yaml
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publish:
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pipeline:
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docker:
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environment:
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- DOCKER_LAUNCH_DEBUG=true
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@ -97,15 +143,21 @@ publish:
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## Known Issues
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There are known issues when attempting to run this plugin on CentOS, RedHat, and Linux installations that do not have a supported storage driver installed. You can check by running `docker info | grep 'Storage Driver:'` on your host machine. If the storage driver is not `aufs` or `overlay` you will need to re-configure your host machine.
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There are known issues when attempting to run this plugin on CentOS, RedHat,
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and Linux installations that do not have a supported storage driver installed.
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You can check by running `docker info | grep 'Storage Driver:'` on your host
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machine. If the storage driver is not `aufs` or `overlay` you will need to
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re-configure your host machine.
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This error occurs when trying to use the default `aufs` storage Driver but aufs is not installed:
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This error occurs when trying to use the default `aufs` storage Driver but aufs
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is not installed:
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```
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level=fatal msg="Error starting daemon: error initializing graphdriver: driver not supported
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```
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This error occurs when trying to use the `overlay` storage Driver but overlay is not installed:
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This error occurs when trying to use the `overlay` storage Driver but overlay
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is not installed:
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```
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level=error msg="'overlay' not found as a supported filesystem on this host.
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@ -113,7 +165,8 @@ Please ensure kernel is new enough and has overlay support loaded."
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level=fatal msg="Error starting daemon: error initializing graphdriver: driver not supported"
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```
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This error occurs when using CentOS or RedHat which default to the `devicemapper` storage driver:
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This error occurs when using CentOS or RedHat which default to the
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`devicemapper` storage driver:
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```
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level=error msg="There are no more loopback devices available."
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@ -121,9 +174,12 @@ level=fatal msg="Error starting daemon: error initializing graphdriver: loopback
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Cannot connect to the Docker daemon. Is 'docker -d' running on this host?
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```
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The above issue can be resolved by setting `storage_driver: vfs` in the `.drone.yml` file. This may work, but will have very poor performance as discussed [here](https://github.com/rancher/docker-from-scratch/issues/20).
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The above issue can be resolved by setting `storage_driver: vfs` in the
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`.drone.yml` file. This may work, but will have very poor performance as
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discussed [here](https://github.com/rancher/docker-from-scratch/issues/20).
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This error occurs when using Debian wheezy or jessie and cgroups memory features are not configured at the kernel level:
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This error occurs when using Debian wheezy or jessie and cgroups memory
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features are not configured at the kernel level:
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```
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time="2015-12-17T08:06:57Z" level=debug msg="Mounting none /sys/fs/cgroup/blkio cgroup blkio"
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@ -135,7 +191,9 @@ time="2015-12-17T08:06:57Z" level=debug msg="Mounting none /sys/fs/cgroup/memory
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time="2015-12-17T08:06:57Z" level=fatal msg="no such file or directory"
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```
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The above issue can be resolved by editing your `grub.cfg` and adding `cgroup_enable=memory swapaccount=1` to you kernel image. This change should look like that afterwards:
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The above issue can be resolved by editing your `grub.cfg` and adding
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`cgroup_enable=memory swapaccount=1` to you kernel image. This change should
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look like that afterwards:
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```
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menuentry 'Debian GNU/Linux, avec Linux 3.16.0-0.bpo.4-amd64' --class debian --class gnu-linux --class gnu --class os {
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