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https://issues.apache.org/jira/browse/AURORA-633?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14118532#comment-14118532
]
Anindya Sinha edited comment on AURORA-633 at 9/2/14 7:08 PM:
--------------------------------------------------------------
Since {{task = Required(Task)}}, no change is being proposed to {{MesosJob (or
Job)}}. Instead, support for docker in aurora is being proposed to be within
the {{Task}} as follows:
1) In {{Task}}, an optional field {{container}} (of type {{Container}} - a new
Struct defined in #2 below) is being added. One of processes or container must
be present in Task definition.
2) Definition of {{Container}} is as follows. Note that volumes is a list of
{{Volume}} defined below (in #3):
class Container(Struct):
name = Default(String, "{{image}}")
image = Required(String)
type = Default(String, "docker") -> The only valid value right now is docker
volumes = Default(List(Volume), [])
3) Definition of a volume is as follows:
class Volume(Struct):
name = Default(String, "{{container_path}}")
container_path = Required(String)
host_path = Required(String)
mode = Default(String, "RO") -> Note that this can be RO or RW
4) Added a 'Docker()' as follows (like 'Service = Job(service=True)'):
{{Docker = Container(type="docker")}}
As an example:
task = Task(
name = "task_hello",
container = Docker(
name = "docker_hello",
image = "centos:6u5",
volumes = [
Volume(
name = "v1",
container_path = "/cnt1",
host_path = "/host1"),
Volume(
name = "v2",
container_path = "/cnt2",
host_path = "/host2",
mode = "RW")
]
),
processes = [hello],
constraints = order(hello),
resources = Resources(cpu = 1.0, ram = 128*MB, disk = 128*MB))
jobs = [Service(task = task, ...)]
was (Author: anindya.sinha):
Since {{task = Required(Task)}}, no change is being proposed to {{MesosJob (or
Job)}}. Instead, support for docker in aurora is being proposed to be within
the {{Task}} as follows:
1) In {{Task}}, an optional field {{container}} (of type {{Container}} - a new
Struct defined in #2 below) is being added. One of processes or container must
be present in Task definition.
2) Definition of {{Container}} is as follows. Note that volumes is a list of
{{Volume}} defined below (in #3):
{{
class Container(Struct):
name = Default(String, "{{image}}")
image = Required(String)
type = Default(String, "docker") -> The only valid value right now is docker
volumes = Default(List(Volume), [])
}}
3) Definition of a volume is as follows:
{{
class Volume(Struct):
name = Default(String, "{{container_path}}")
container_path = Required(String)
host_path = Required(String)
mode = Default(String, "RO") -> Note that this can be RO or RW
}}
4) Added a 'Docker()' as follows (like 'Service = Job(service=True)'):
{{Docker = Container(type="docker")}}
As an example:
{{
task = Task(
name = "task_hello",
container = Docker(
name = "docker_hello",
image = "centos:6u5",
volumes = [
Volume(
name = "v1",
container_path = "/cnt1",
host_path = "/host1"),
Volume(
name = "v2",
container_path = "/cnt2",
host_path = "/host2",
mode = "RW")
]
),
processes = [hello],
constraints = order(hello),
resources = Resources(cpu = 1.0, ram = 128*MB, disk = 128*MB))
jobs = [Service(task = task, ...)]
}}
> Support running Docker containers
> ---------------------------------
>
> Key: AURORA-633
> URL: https://issues.apache.org/jira/browse/AURORA-633
> Project: Aurora
> Issue Type: Epic
> Components: Client, Scheduler
> Reporter: Jay Buffington
> Assignee: Jay Buffington
>
> Mesos 0.20 will be released soon, and it will likely include support for a
> docker containerizer. See MESOS-1524.
> To make use of this feature, I propose modifying aurora's DSL to support
> running docker containers both with and without the aurora executor.
> Task would be changed to introduce a container field and make processes
> optional when a container is specified. A Task to launch a Docker container
> using the entry point (aka command) specified in the container would look
> like this:
> {noformat}
> Task(
> name="my-task",
> container=Docker(
> image="docker:///centos:6u5',
> ),
> resources=Resources(cpu=1, disk=10*GB, ram=1*GB)
> )
> {noformat}
> If you specify processes in your Task then the docker containerizer will
> fetch and launch the aurora executor for you. This would run {{process_a}}
> then {{process_b}} inside the same docker container using the aurora executor:
> {noformat}
> Task(
> name="my-task",
> container=Docker(
> image="docker:///centos:6u5',
> ),
> processes=[process_a, process_b],
> constraints=order(process_a, process_b),
> resources=Resources(cpu=1, disk=10*GB, ram=1*GB)
> )
> {noformat}
> The Docker() struct would closely model the fields that will be in the
> DockerInfo protobuf message detailed here:
> https://github.com/tnachen/mesos/wiki/DockerInfo-design
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