Posts for: #Orchestration

Annotated documentation for DockerInc::Docker::Container

2014-08-30

#docker #openstack #heat #orchestration

This is a companion to my article on the Docker plugin for Heat.

DockerInc::Docker::Container

Properties

cmd : List
Command to run after spawning the container.
Optional property.
Example:
```
  cmd: [ 'thttpd', '-C', '/etc/thttpd.conf', '-D', '-c', '*.cgi']
```
dns : List
Set custom DNS servers.
Example:
```
  dns:
    - 8.8.8.8
    - 8.8.4.4
```
docker_endopint : String
Docker daemon endpoint. By default the local Docker daemon will be used.
Example:
```
  docker_endpoint: tcp://192.168.1.100:2375
```

env : String

Set environment variables.

Example:

  env:
    - MYSQL_ROOT_PASSWORD=secret
    - "ANOTHER_VARIABLE=something long with spaces"

hostname : String
Hostname of the container.
Example:
```
  hostname: mywebserver
```
image : String
Image name to boot.
Example:
```
  image: mysql
```

links : Mapping

Links to other containers.

Example:

  links:
    name_in_this_container: name_of_that_container

memory : Number
Memory limit in bytes.
Example:
```
  # 512 MB
  memory: 536870912
```
name : String
Name of the container.
Example:
```
  name: dbserver
```
open_stdin : Boolean
True to open stdin.
Example:
```
  open_stdin: true
```

port_bindings : Map

TCP/UDP port bindings.

Example:

  # bind port 8080 in the container to port 80 on the host
  port_bindings:
    8080: 80

port_specs : List
List of TCP/UDP ports exposed by the container.
Example:
```
  port_specs:
    - 80
    - 53/udp
```
privileged : Boolean
Enable extended privileges.
Example:
```
  privileged: true
```
stdin_once : Boolean
If true, close stdin after the one attached client disconnects.
Example:
```
  stdin_once: true
```
tty : Boolean
Allocate a pseudo-tty if true.
Example:
```
  tty: true
```
user : String
Username or UID for running the container.
Example:
```
  username: apache
```

volumes : Map

Create a bind mount.

Example:

  volumes:
      /var/tmp/data_on_host: /srv/data_in_container

volumes_from : String
This option is broken in the current version of the Docker plugin.

Docker plugin for OpenStack Heat

2014-08-30

#docker #openstack #heat #orchestration #pull-request

I have been looking at both Docker and OpenStack recently. In my last post I talked a little about the Docker driver for Nova; in this post I’ll be taking an in-depth look at the Docker plugin for Heat, which has been available since the Icehouse release but is surprisingly under-documented.

The release announcement on the Docker blog includes an example Heat template, but it is unfortunately grossly inaccurate and has led many people astray. In particular: