Hi Aaron Actually both mesos-dns and calico are running even though these containers im running are not, yet, using the calico ipaddr specific in json description. So i guess it is a problem of bridging, i guess simply specify HOST option on container field in Marathon UI Il 26/apr/2016 16:59, "Aaron Carey" <[email protected]> ha scritto:
> --link in docker should really be avoided when using marathon/mesos as it > implies the containers are on the same host, but this will not always be > the case when mesos schedules your containers (also I think it's being > deprecated in docker anyway.. not sure though?). > > This problem looks like one of service discovery within the mesos cluster: > how does one service contact the other when it doesn't know which host the > other service may have landed on? > > There are several different solutions for service discovery, you can look > into some like Project Calico to offer a network layer to docker or try dns > based solutions like Mesos-dns or Consul (along with mesos-consul). I think > marathon also has some concept of service discovery built in too if you use > something like haproxy. > > I hope this helps! > > Aaron > > -- > > Aaron Carey > Production Engineer - Cloud Pipeline > Industrial Light & Magic > London > 020 3751 9150 > > ------------------------------ > *From:* June Taylor [[email protected]] > *Sent:* 26 April 2016 15:22 > *To:* [email protected] > *Subject:* Re: Launch docker container from Marathon UI > > Stefano, > > The docker run flag --link is intended to connect the container to another > running container. I do not know how this would operate in marathon. > Perhaps it would be an application group which starts up the mysql docker > image first, then the Wordpress docker image after it. > > > Thanks, > June Taylor > System Administrator, Minnesota Population Center > University of Minnesota > > On Tue, Apr 26, 2016 at 9:20 AM, Stefano Bianchi <[email protected]> > wrote: > >> Thanks *Rad* Gruchalski, actually i'm trying to make a json file that >> "translate" this command in marathon: >> >> docker run --name some-wordpress --link some-mysql:mysql -d wordpress >> >> i guess the error is relate to the fact that i'm not specifying --link >> some-mysql:mysql >> My problem is that i don't know how to do that, i tried to fill >> environment variable fields: >> >> Key = link >> Value = some-mysql:mysql >> >> But in this way the app does not work as well. How can i configure these >> env variables? >> >> 2016-04-26 16:01 GMT+02:00 Rad Gruchalski <[email protected]>: >> >>> It says exactly what the problem is. >>> >>> Start a marathon task with correct environment variables in env and you >>> will be fine. >>> >>> Best regards, >>> Radek Gruchalski >>> [email protected] <[email protected]> >>> de.linkedin.com/in/radgruchalski/ >>> >>> >>> *Confidentiality: *This communication is intended for the above-named >>> person and may be confidential and/or legally privileged. >>> If it has come to you in error you must take no action based on it, nor >>> must you copy or show it to anyone; please delete/destroy and inform the >>> sender immediately. >>> >>> On Tuesday, 26 April 2016 at 15:56, Stefano Bianchi wrote: >>> >>> jupyter is working fine. >>> i tried to run wordpress and i get this error in stderr of mesos: >>> >>> error: missing WORDPRESS_DB_HOST and MYSQL_PORT_3306_TCP environment >>> variables >>> >>> Did you forget to --link some_mysql_container:mysql or set an external >>> db >>> >>> with -e WORDPRESS_DB_HOST=hostname:port? >>> >>> >>> >>> Some one of you know this issue? >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> 2016-04-26 15:51 GMT+02:00 Stefano Bianchi <[email protected]>: >>> >>> However thank you so much to all! >>> >>> 2016-04-26 15:22 GMT+02:00 Stefano Bianchi <[email protected]>: >>> >>> i found the answer by my self sorry if i disturbed you. >>> >>> 2016-04-26 15:19 GMT+02:00 Stefano Bianchi <[email protected]>: >>> >>> Now that it is running, how can i check the User Interface? >>> >>> >>> 2016-04-26 15:18 GMT+02:00 Stefano Bianchi <[email protected]>: >>> >>> Yes, now it's running!!! June you are awesome!!! >>> >>> 2016-04-26 15:16 GMT+02:00 Stefano Bianchi <[email protected]>: >>> >>> i have done these 2 commands, now jupyter is in deploying in marathon, >>> staging in mesos. >>> Is there some additional configuration needed? >>> >>> 2016-04-26 15:13 GMT+02:00 Stefano Bianchi <[email protected]>: >>> >>> June i tried to run your json, but the task is waiting, and if starts it >>> failed immediately. >>> >>> I guess because i did not type this commands: >>> >>> >>> 1. >>> >>> echo 'docker,mesos' > /etc/mesos-slave/containerizers >>> >>> 2. >>> >>> $ echo '5mins' > /etc/mesos-slave/executor_registration_timeout >>> >>> >>> Could it be the problem? >>> >>> 2016-04-26 15:02 GMT+02:00 Stefano Bianchi <[email protected]>: >>> >>> Thank you June taylor, it is axactly what i was intending. >>> if it is not disturbing you, i try jupyter notebook as well, just to >>> make some tests on how to launch marathon. >>> stay tuned :) >>> >>> 2016-04-26 14:58 GMT+02:00 Stefano Bianchi <[email protected]>: >>> >>> thanks haosdent. >>> actually i have run this kind of apps through rest api. >>> Now i want learn how to laung docker files. I found this exaple: >>> >>> { >>> "container": { >>> "type": "DOCKER", >>> "docker": { >>> "network": "HOST", >>> "image": "group/image" >>> }, >>> "volumes": [ >>> { >>> "containerPath": "/etc/a", >>> "hostPath": "/var/data/a", >>> "mode": "RO" >>> }, >>> { >>> "containerPath": "/etc/b", >>> "hostPath": "/var/data/b", >>> "mode": "RW" >>> } >>> ] >>> }} >>> >>> >>> I am able to link the correspondent field in the marathon UI with what >>> is written in this json. >>> What i need to understand is, what i should write in: >>> >>> "image": "group/image" >>> >>> i mean, with what i have to replace group and image? >>> For instance, if i would run wordpress container on docker hub what i >>> should put replacing "group/image" ? >>> >>> >>> >>> >>> >>> >>> >>> 2016-04-26 14:30 GMT+02:00 haosdent <[email protected]>: >>> >>> This is marathon REST API document: >>> https://mesosphere.github.io/marathon/docs/rest-api.html#post-v2-apps . >>> Usually we define a task json file and call the rest api. >>> >>> For example, create tasks.json which content is >>> >>> ``` >>> { >>> "id": "/test-sleep", >>> "cmd": "sleep 200" >>> } >>> ``` >>> >>> And >>> >>> ``` >>> curl -X POST -H "Content-type: application/json" >>> http://${YOUR_MARATHON_ADDR}:8080/v2/apps >>> -d @tasks.json >>> ``` >>> >>> You could find more field definitions in their document. >>> >>> On Tue, Apr 26, 2016 at 8:24 PM, Stefano Bianchi <[email protected]> >>> wrote: >>> >>> Hi guys >>> >>> i'm trying to follow the instructions on mesosphere documentation, but >>> it is a little bit unlear for me that i am new to this world. >>> i' would like to launch a wordpress container, present on docker hub >>> here https://hub.docker.com/_/wordpress/ , from marathon UI but i don't >>> understand the mechanism. >>> I understood that i don't have to specify a command in "Command" field, >>> but i don't know how to fill the dockers fields in marathon UI to launch >>> wordpress container. >>> Could you please help me or tell me where i can find a clearer >>> documentation? >>> >>> Thanks. >>> >>> >>> >>> >>> -- >>> Best Regards, >>> Haosdent Huang >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >> >
