problem about docker-Collection of common programming errors

12 years ago
admin
4 minutes

  • user1041996
    docker
    I read this article http://blog.docker.io/2013/09/docker-can-now-run-within-docker/ and i want to share images between my “host” docker and “child” docker. But when i run sudo docker run -v /var/lib/docker:/var/lib/docker -privileged -t -i jpetazzo/dindI can’t connect to “child” docker from dind container.root@5a0cbdc2b7df:/# docker versionClient version: 0.8.1Go version (client): go1.2Git commit (client): a1598d12014/03/13 18:37:49 Can’t connect to docker daemon. Is ‘docker -d’ running on this

  • user3280800
    validation installation osx-mavericks docker
    On OSX 10.9 with Virtual Box 4.3.6 and using boot2docker. 1) ./boot2docker ssh ssh_exchange_identification: Connection closed by remote hostI don’t always see the last line. The documentation leads me to believe that this might be a key problem, but attempts to run ssh-keygen to remove keys on the OSX hosts run afoul of a message that the known_hosts file is not valid (though it exists and has worked for other purposes). I never see the login.2) I see some strange behavior some of which keep me

  • user3247089
    docker lxc
    *i start the linux container in docker with specific cpus *typing command ‘cat /proc/cpuinfo in my container, container shows full specification of laptop instead of only container.why this can v happened ?

  • Gary Chang
    linux chroot docker
    I have recently discovered Docker, and I think it’s a great tool for managing my runtime environments. However, I also have some OpenVZ VPS’es that don’t support LXC, so I’m thinking about using docker export to export the filesystem of an image, extract the resulting tarball to a directory in the VPS, and then chroot into that directory and run the services inside the image.Is it safe to do this? What customizations does Docker make to the filesystem of its image (I can see a .dockerinit file i

  • diosney
    scale production docker
    So I recently discovered this awesome tool, and it says Docker is an open-source project to easily create lightweight,portable, self-sufficient containers from any application. The samecontainer that a developer builds and tests on a laptop can run atscale, in production, on VMs, bare metal, OpenStack clusters, publicclouds and more.Let’s say I have a docker image which runs Nginx and a website connects to external database.I am just wondering how to scale the container in production? A simple g

  • w00t
    openshift docker
    Docker and OpenShift are both frameworks to implement a PaaS service.How do they compare in architecture and features?

  • Mate Varga
    linux bash docker
    Is there any way to determine if a process (script) runs inside an lxc container (~ Docker runtime)? I know that some programs are able to detect whether they run inside a virtual machine, is something similar available for lxc/docker?Thanks.

  • dabai
    linux docker
    My understanding is, that a docker image shares the boot file system with the host and tries to share as much as possible of the root file system.What if I run an ubuntu base image on a current arch? They not only differ by means of the root fs (e.g. systemd vs upstart) but also the boot fs (e.g. kernel 3.5 vs 3.12). Does the ubuntu image spin up its own kernel in that case?What if I run an ubuntu image on ubuntu?Should I expect:Better performance? Smaller image sizes? Lower memory footprint? Is

  • Mark Nijhof
    networking docker
    I have a Docker image with ubuntu:latest and a few other dependencies. The script it starts automatically expects 2 NIC’s eth0 (which is there by default) and eth1. Because this second NIC isn’t there the script crashes and the container is stopped. So using Pipeworks doesn’t work as the container isn’t there anymore.I tried adding this to the Dockerfile:RUN echo “auto eth1” >> /etc/network/interfaces RUN echo “iface eth1 inet dhcp” >> /etc/network/interfacesBut that didn’t work eith

  • James
    node.js docker
    We’re running a Node.js/Express application which runs for a few hours and will then start to throw 504 errors for no good reason. Since we’re currently unable to track these errors down we need to restart the application every hour or so to ensure it’s still running during the weekend.Our Ubuntu server runs Dokku, which then has a container setup for our application. Every time the application spits a 504 we have to run docker restart appid as root.So what’s the best way of automatically restar

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