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From Jay Taylor <...@jaytaylor.com>
Subject Re: Containers are always being started with `-c "$MESOS_SANDBOX/null"`
Date Mon, 03 Aug 2015 15:31:08 GMT
Hi Steve,

Here is my scheduler.sh (I started with
examples/scheduler/scheduler-local.sh):


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> *#!/usr/bin/env bashset -o errexitset -o pipefailset -x. /etc/profile# An
> example scheduler launch script.# It assumes a local ZooKeeper ensemble
> running at localhost:2181 and a master under /mesos/master# Location where
> aurora-scheduler.zip was
> unpacked.AURORA_SCHEDULER_HOME=/usr/local/aurora-scheduler# Flags that
> control the behavior of the JVM.JAVA_OPTS=(  -server  -Xmx1g  -Xms1g  #
> Location of libmesos-XXXX.so / libmesos-XXXX.dylib
> -Djava.library.path=/usr/local/lib)# Flags control the behavior of the
> Aurora scheduler.# For a full list of available flags, run
> bin/aurora-scheduler -helpAURORA_FLAGS=(  -cluster_name=gw_hobart  # Ports
> to listen on.  -http_port=8081  -native_log_quorum_size=1
> -zk_endpoints=localhost:2181
> -mesos_master_address=zk://localhost:2181/mesos
> -serverset_path=/aurora/scheduler
> -native_log_zk_group_path=/aurora/replicated-log
> -native_log_file_path="$AURORA_SCHEDULER_HOME/db"
> -backup_dir="$AURORA_SCHEDULER_HOME/backups"  # TODO(Kevin Sweeney): Point
> these to real URLs.  -thermos_executor_path=/dev/null
> -allowed_container_types='MESOS,DOCKER'  -allow_docker_parameters=true
> -vlog=FINEST  -logtostderr)# Environment variables control the behavior of
> the Mesos scheduler driver (libmesos).export GLOG_v=1export
> LIBPROCESS_PORT=8083JAVA_OPTS="${JAVA_OPTS[*]}" exec
> "$AURORA_SCHEDULER_HOME/bin/aurora-scheduler" "${AURORA_FLAGS[@]}"*


And now I see that things are just as you said: invalid "null" thermos.pex
path:


> *# TODO(Kevin Sweeney): Point these to real URLs.**
> -thermos_executor_path=/dev/null*


I'll get that sorted and try again.

Thank you for your help!

On Mon, Aug 3, 2015 at 7:29 AM, Steve Niemitz <sniemitz@twitter.com.invalid>
wrote:

> It seems like your scheduler is misconfigured somehow.  The args being
> passed in the docker container should look like:
> [
>   "-c",
>   "$MESOS_SANDBOX/thermos_executor.pex <lots of arguments>"
> ]
>
> Can you attach the flags you've configured the scheduler with?  It looks
> like the executor uri flag is somehow wrong (is it possible its actually
> "null" in your config?)
>
> On Sat, Aug 1, 2015 at 5:19 PM, Jay Taylor <outtatime@gmail.com> wrote:
>
> > Greetings Aurora folks,
> >
> > I want to get a docker container running on Aurora.
> >
> > Here is my .aurora file:
> >
> >
> > > *run_process = Process(*
> > > *    name="my-app",*
> > > *    cmdline="sleep 300",**)*
> > >
> > > *app_task = Task(*
> > > *  name = "my-app",*
> > > *  processes = [run_process],*
> > > *  resources = Resources(*
> > > *    cpu = 1,*
> > > *    disk = 100*MB,*
> > > *    ram = 512*MB,*
> > > *  ),**)*
> > >
> > > *app_container = Container(*
> > > *  docker = Docker(*
> > > *    image = "my-registry:5001/jay/my-app",*
> > > *    parameters = [*
> > > *      {*
> > > *        "name": "env",*
> > > *        "value": "FOO=BAR",*
> > > *      },*
> > > *    ],*
> > > *  ),**)*
> > >
> > > *jobs = [*
> > > *  Service(*
> > > *    cluster = "test_cluster",*
> > > *    environment = "devel",*
> > > *    role = "web-server",*
> > > *    name = "my-app",*
> > > *    instances = 1,*
> > > *    task = app_task,*
> > > *    container = app_container,*
> > > *  ),**]*
> >
> >
> > My expectation was that the container would be invoked and "sleep 300"
> > would be run inside (for testing purposes).
> >
> > However, the task almost immediately starts an endless "flapping penalty"
> > cycle.
> >
> > Inspecting one of the failed containers reveals some interesting
> > information:
> >
> > *$ sudo docker inspect 1337afaf7331*
> >
> > *[{*
> >
> > *    "AppArmorProfile": "",*
> >
> > *    "Args": [*
> >
> > *        "-c",*
> >
> > *        "$MESOS_SANDBOX/null"*
> >
> > *    ],*
> >
> > *    "Config": {*
> >
> > *        "AttachStderr": false,*
> >
> > *        "AttachStdin": false,*
> >
> > *        "AttachStdout": false,*
> >
> > *        "Cmd": [*
> >
> > *            "-c",*
> >
> > *            "$MESOS_SANDBOX/null"*
> >
> > *        ],*
> >
> >
> > Why is the task launch command "$MESOS_SANDBOX/null"?
> >
> > I also tried to get one of the examples up
> > (./src/test/sh/org/apache/aurora/e2e/http/http_example_docker.aurora),
> but
> > the task immediately starts flapping and no containers even get created.
> >
> > How can we get control over the -c command sent to docker?
> Alternatively,
> > if there is some way to prevent the "-c" flag altogether that would work
> > too since the docker image already has a perfectly fine CMD defined.
> >
> > Any insight or information would be GREATLY appreciated!!!
> >
> > Best regards,
> > Jay
> >
>

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