I think the problem is that it is not known which agent the task is running on until the task i in the running state. Hence the master can’t pass that as an env variable to the task. However, I see your point. There is an agent host name avaialble in the task as $HOST. Maybe it would be a good idea if Mesos was setting env variables named AGENT_IP_0, AGENT_IP_1 and so on for every IP interface on the agent, maybe AGENT_BIND_IP if bind IP is different than 0.0.0.0. OTOH, I can see how this could be considered as some security issue. I am not sure what the implications could be.
Anybody else care to comment? – Best regards, Radek Gruchalski [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 June 7, 2016 at 1:42:46 AM, Eli Jordan ([email protected]) wrote: Thanks Radoslaw. I'm not really set on using host names, I just want a reliable way to start the framework. For the meantime I have gone with a solution similar to what you suggested. We use /etc/default/mesos file to configure mesos, and it has the ip defined, so I just mounted that in the container and read the ip. I would like to avoid having a dependency on the file system of the agents though. I'm not sure why I can't have the docket executor set the LIBPROCESS_IP variable in the same way the command executor does. Thanks Eli On 6 Jun 2016, at 21:44, Radoslaw Gruchalski <[email protected]> wrote: Out of curiosity. Why are you insisting on using host names? Say you have 1 master and 2 agents with these IPs: - mesos-master-0: 10.100.1.10 - mesos-agent-0: 10.100.1.11 - mesos-agent-1: 10.100.1.12 Your problem is that you have no way to obtain an IP address of the agent in the container. Correct? One way to overcome this problem is to create a shell file, say in /etc/mesos-agent.sh, with contents like: ... AGENT_IP=10.100.1.11 … If you’re using Marathon, you can copy that file to the sandbox using docker volumes: { "containerPath": “/etc/mesos-agent.sh", "hostPath": "/etc/mesos-agent.sh", "mode": "RO" } You can now source that in the container to set the LIBPROCESS_ADVERTISE_IP. Other applications simply use the mesos-agent-X host name. That’s without mesos-dns. Things are easier with mesos-dns or consul service catalog (I prefer the latter). – Best regards, Radek Gruchalski [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 June 6, 2016 at 1:16:07 PM, Eli Jordan ([email protected]) wrote: The issue refers to LIBPROCESS_IP not LIBPROCESS_HOST. I haven’t been able to find the LIBPROCESS_HOST variable documented anywhere. My understanding is that the scheduler uses LIBPROCESS_IP to determine which network interface to bind to, and also which ip to advertise to the master, so that the master can send offers. There is also another variable LIBPROCESS_ADVERTISE_IP. If this is defined then LIBPROCESS_IP is used to determine which network interface to bind to, and LIBPROCESS_ADVERTISE_IP is used to determine which ip to advertise to the master. It would be great if there was a LIBPROCESS_ADVERTISE_HOST variable, then I could just use the $HOST variable to define this. On 5 Jun 2016, at 10:41 pm, Sivaram Kannan <[email protected]> wrote: I have been using this way from 0.23.0 to the 0.28.0. This has been surely working (although for a different framework). Inside the docker container can you see the $HOST variable defined?? The ticket you referred says that the apps definition needs to define LIBPROCESS_HOST=$HOST to be make the framework take the proper IP - you are describing a different problem. Thanks, ./Siva. On Sun, Jun 5, 2016 at 4:30 AM, Eli Jordan <[email protected]> wrote: > I found this issue on the mesos jira that describes the exact issue I am > hitting. > > https://issues.apache.org/jira/browse/MESOS-3740 > > It doesn't appear to be resolved. > > Thanks > Eli > > On 5 Jun 2016, at 16:46, Eli Jordan <[email protected]> wrote: > > Hmmm… that doesn’t seem to work for me. What version of mesos does this > work in? I am running 0.27.1. > > When using this approach, I still get the following error when the kafka > mess framework is starting up. > > "Scheduler driver bound to loopback interface! Cannot communicate with > remote master(s). You might want to set 'LIBPROCESS_IP' environment > variable to use a routable IP address.” > > I tried setting LIBPROCESS_IP to ‘0.0.0.0’ and > LIBPROCESS_ADVERTISE_IP=‘the public ip’ and this works. But the host > variations don’t seem to work. (i.e. set LIBPROCESS_IP=0.0.0.0 and > LIBPROCESS_ADVERTISE_HOST=$HOST) > > It seems lib process doesn’t support using host names. > > I think I might have to run the framework outside of docker, but I would > really like to avoid this. > > This problem would be solved if the docker executor was able to set the > same environment variables as the command executor. Is there a way to make > this happen? > > I saw that mesos can be extended with a Hook ‘module’ to set extra > environment variables in docker containers. This might be a solution, but > seems over wrought for a simple problem. > > > On 5 Jun 2016, at 12:50 am, Sivaram Kannan <[email protected]> wrote: > > > Hi, > > Can you try adding && after the LIBPROCESS_HOST variable and the actual > command. We have been using this for sometime now. > > "cmd": "LIBPROCESS_HOST=$HOST && ./kafka-mesos.sh .. > > Thanks, > ./Siva. > > > On Sat, Jun 4, 2016 at 8:34 AM, Eli Jordan <[email protected]> > wrote: > >> Hi @haosdent >> >> Based on my testing, this is not the case. >> >> I ran a task (from marathon) without using a docker container that just >> printed out all environment variables. i.e. while [ true ]; do env; sleep >> 2; done >> >> I then run a task that executed the same command inside an alpine docker >> image. >> >> When running without a docker image LIBPROCESS_IP was defined along with >> many other variables. >> >> Sample output when running without docker (note LIBPROCESS_IP) is defined >> >> Registered executor on mesos-slave0 >> Starting task plain-test.5e5b00cc-2645-11e6-a3dd-080027aa149e >> sh -c 'while [ true ]; do env; sleep 2; done' >> Forked command at 16571 >> LIBPROCESS_IP=192.168.3.16 >> MESOS_AGENT_ENDPOINT=192.168.3.16:5051 >> MESOS_EXECUTOR_REGISTRATION_TIMEOUT=5mins >> HOST=mesos-slave0 >> SHELL=/bin/sh >> >> MESOS_DIRECTORY=/var/mesos/slaves/7ad17efe-0f9e-4703-9d2e-7fb9ee03f64c-S0/frameworks/aae929c7-24a5-4463-9ae0-bc7b044973c5-0000/executors/plain-test.5e5b00cc-2645-11e6-a3dd-080027aa149e/runs/c9b6ef86-b37d-4e3c-b1ca-bd680aed779f >> PORT0=31082 >> PORT_10001=31082 >> LC_ALL=en_US.UTF-8 >> … more >> >> >> Sample output when running with docker (note LIBPROCESS_IP is not defined) >> >> --container="mesos-7ad17efe-0f9e-4703-9d2e-7fb9ee03f64c-S0.f3a94ab4-dfff-4e97-b806-f1cc501ecf42" >> --docker="docker" --docker_socket="/var/run/docker.sock" --help="false" >> --initialize_driver_logging="true" --launcher_dir="/usr/libexec/mesos" >> --logbufsecs="0" --logging_level="INFO" >> --mapped_directory="/mnt/mesos/sandbox" --quiet="false" >> --sandbox_directory="/var/mesos/slaves/7ad17efe-0f9e-4703-9d2e-7fb9ee03f64c-S0/frameworks/aae929c7-24a5-4463-9ae0-bc7b044973c5-0000/executors/alpine-test.77d5a3d9-2644-11e6-a3dd-080027aa149e/runs/f3a94ab4-dfff-4e97-b806-f1cc501ecf42" >> --stop_timeout="0ns" >> --container="mesos-7ad17efe-0f9e-4703-9d2e-7fb9ee03f64c-S0.f3a94ab4-dfff-4e97-b806-f1cc501ecf42" >> --docker="docker" --docker_socket="/var/run/docker.sock" --help="false" >> --initialize_driver_logging="true" --launcher_dir="/usr/libexec/mesos" >> --logbufsecs="0" --logging_level="INFO" >> --mapped_directory="/mnt/mesos/sandbox" --quiet="false" >> --sandbox_directory="/var/mesos/slaves/7ad17efe-0f9e-4703-9d2e-7fb9ee03f64c-S0/frameworks/aae929c7-24a5-4463-9ae0-bc7b044973c5-0000/executors/alpine-test.77d5a3d9-2644-11e6-a3dd-080027aa149e/runs/f3a94ab4-dfff-4e97-b806-f1cc501ecf42" >> --stop_timeout="0ns" >> Registered docker executor on mesos-slave0 >> Starting task alpine-test.77d5a3d9-2644-11e6-a3dd-080027aa149e >> HOSTNAME=984809b0b720 >> SHLVL=1 >> HOME=/root >> PORT=31295 >> >> MESOS_CONTAINER_NAME=mesos-7ad17efe-0f9e-4703-9d2e-7fb9ee03f64c-S0.f3a94ab4-dfff-4e97-b806-f1cc501ecf42 >> MARATHON_APP_ID=/alpine-test >> PORTS=31295 >> PORT0=31295 >> MARATHON_APP_DOCKER_IMAGE=alpine >> PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin >> MESOS_SANDBOX=/mnt/mesos/sandbox >> MARATHON_APP_RESOURCE_DISK=0.0 >> MARATHON_APP_RESOURCE_MEM=128.0 >> HOST=mesos-slave0 >> PORT_10000=31295 >> MARATHON_APP_VERSION=2016-05-30T08:56:59.065Z >> MARATHON_APP_LABELS= >> PWD=/ >> MESOS_TASK_ID=alpine-test.77d5a3d9-2644-11e6-a3dd-080027aa149e >> MARATHON_APP_RESOURCE_CPUS=1.0 >> >> Is there some other config I need to do for the docker containerizer? Any >> help greatly appreciated. >> >> On 4 Jun 2016, at 7:28 pm, haosdent <[email protected]> wrote: >> >> Hi, @Jordan. I think not matter you use MesosContainerizer or >> DockerContainerizer, LIBPROCESS_IP always would be set if you launch you >> Agent with `--ip` flag. >> >> On Fri, Jun 3, 2016 at 8:23 PM, Eli Jordan <[email protected]> >> wrote: >> >>> >>> The reason I need to set LIBPROCESS_IP is because the slaves have 2 >>> network interfaces, and the docker container is running in host networking >>> mode. So libmesos doesn’t know which IP to advertise. The hostnames of the >>> slaves are all resolvable. >>> >>> I have noticed that if I run a marathon app that doesn’t use docker, >>> e.g. while [ true ]; do env; sleep 2; done, that LIBPROCESS_IP is defined >>> in the environment. However, when running a docker image this variable is >>> not defined. >>> >>> Is there a way to have marathon pass along all environment variables >>> defined by mesos? >>> Thanks >>> Eli >>> >>> On 4 Apr 2016, at 14:12, Eli Jordan <[email protected]> wrote: >>> >>> @haosdent I’m not sure how this works internally, but it seems the mess >>> master needs to send requests to the framework for resource offers, and >>> therefore needs to know the external IP (i.e. the host IP) >>> >>> @craig w >>> Would I need to do this in the cmd portion of the marathon JSON? I >>> currently have the config below >>> { >>> "container": ..., >>> "id":"kafka-mesos-scheduler", >>> "cpus": 0.5, >>> "mem": 256, >>> "ports": [9999], >>> "cmd": "./kafka-mesos.sh scheduler --master=mesos-master:5050 >>> --zk=mesos-master:2181 --api=http://mesos-slave0:9999 >>> --storage=zk:/kafka-mesos", >>> "instances": 1, >>> "constraints": [["hostname", "LIKE", "mesos-slave0"]], >>> "env": { >>> "LIBPROCESS_IP": "192.168.3.16" >>> } >>> } >>> >>> @Chris Baker Currently we don’t have mess-dns setup but if this works it >>> would seem to be a nice solution. However, I did try setting LIBPROCESS_IP >>> to the slave hostname and it seems to produce a parse error. So I think it >>> needs to be an actual IP address. >>> >>> I was hoping there would be a configuration for the slave that would >>> automatically populate this env variable when starting the docker >>> container. So I don’t need to complicate the marathon file, and can reuse >>> it in different clusters. >>> >>> >>> On 4 Apr 2016, at 11:25 am, Chris Baker <[email protected]> wrote: >>> >>> Alternatively, because the $HOST username is indirect, which would >>> require a runtime element to "export $LIBPROCESS_IP=$HOST", another >>> alternative is to fallback on Mesos-DNS, if that's part of the cluster >>> deployment, setting $LIBPROCESS_IP to the (a priori) Mesos-DNS entry >>> corresponding to the service. >>> >>> On Sun, Apr 3, 2016 at 5:06 PM craig w <[email protected]> wrote: >>> >>>> Hi, marathon sets the HOST env var. If it's not the ip address you can >>>> use getent with the value from HOST to figure it out. >>>> >However, in order for the frameworks to receive resource offers I >>>> need to set the LIBPROCESS_IP environment variable to the hosts IP address >>>> for the docker container running the frameworks. >>>> >>>> Hi, @Gmail. Could you provide more details about this? >>>> >>>> On Sun, Apr 3, 2016 at 10:40 PM, Rad Gruchalski <[email protected]> >>>> wrote: >>>> >>>>> Hi Gmail, >>>>> >>>>> AFAIK not. The only way to do so is setting up the env variable as you >>>>> do now. >>>>> >>>>> >>>>> >>>>> Kind 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 Sunday, 3 April 2016 at 16:09, Gmail wrote: >>>>> >>>>> I'm pretty new to mesos and marathon, and I'm running a couple of >>>>> frameworks with marathon (Kafka and elastic search). However, in order for >>>>> the frameworks to receive resource offers I need to set the LIBPROCESS_IP >>>>> environment variable to the hosts IP address for the docker container >>>>> running the frameworks. Currently I am working around me this by using a >>>>> constraint to hard wire the slave that the framework gets launched on, so >>>>> then I can put the slaves ip in the marathon json file. >>>>> >>>>> Obviously this is not ideal. Is there a better way to define the host >>>>> ip Inside the docker container? >>>>> >>>>> Sent from my iPad >>>>> >>>>> >>>>> >>>> >>>> >>>> -- >>>> Best Regards, >>>> Haosdent Huang >>>> >>> >>> >> >> >> -- >> Best Regards, >> Haosdent Huang >> >> >> > > > -- > ever tried. ever failed. no matter. > try again. fail again. fail better. > -- Samuel Beckett > > > -- ever tried. ever failed. no matter. try again. fail again. fail better. -- Samuel Beckett
