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Questions tagged [docker]

Docker is an open source project that automates the deployment of applications inside software containers.

Docker is an open source project that automates the deployment of applications inside software containers. Docker extends a common container format called Linux Containers (LXC), with a high-level API providing a lightweight virtualization solution that runs processes in isolation. Docker utilizes LXC, cgroups, and the Linux kernel itself. Unlike traditional virtual machines, a Docker container does not include a separate operating system, instead it relies on the operating system’s functionality provided by the underlying infrastructure.

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unable to install docker engine inside ubuntu image as libsystemd0 is not installable

I'm attempting to build a container image based on ubuntu which has the docker engine installed on it. This is what I have in my dockerfile: FROM ubuntu:trusty MAINTAINER Ervin Varga RUN apt-get update RUN apt-get -y upgrade RUN apt-get install…
ChrisAdkin
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Kubernetes ImagePullBackOff caused by no space left on device

I have this weird error on my Kubernetes test cluster. I'm running Kubernetes 1.7.0 and docker Docker version 1.12.6, build 78d1802 I have a separate volume mounted as /dockerdata and symlinked /var/lib/docker into this volume. I have ample space…
Trondh
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How to share session IDs among distributed nginx deployments?

I need to deploy a handful of nginx (with docker). These instances need to share a in memory pool of session IDs so that TLS resumption can take place regardless which instance client connects to. Session tickets with shared key rotation would be…
Igor Gatis
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Forward connections to a virtual machine within a docker container

What I'm trying to achieve At work we use a specific operating system, which we (the developers) run within virtualbox. The virtualized OS is running Samba server and rsh that we use to access the OS. Also, the virtualized OS needs access to several…
stativ
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Getting up and running with Docker EE

I have just installed Docker EE on my Windows 2016 server. (Following instructions at: https://docs.docker.com/engine/installation/windows/docker-ee/) and pulling volumes works and running containers has been fine. But it feels limited. Previously…
Dave Alger
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YARN AM logs report different time-stamp from what is shown in terminal and sparkscala shell

I am trying to understand why the following occurred: I have a Docker container with Yarn and Spark running fine except that the timestamp of that container was minus X hours of what I wanted it to be. So when I was running date it was returning a…
rudimuse
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Add memory and cpu limit without deleting container

How can I add arguments to an already existing docker container? I want to add the following arguments to limit the resources for the container: --memory=512m --cpus=1
Florian
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Bash script entrypoint (PID=1) kills `tail` sub process ONLY if a fake trap (which does NOTHING) was there

I am facing a strange behavior in my Bash script, I have this Bash script which is running with PID 1 (it is an entrypoint for Docker container, if you are not familiar with Docker, I assume you can ignore this info). When I run the following…
Mohammed Noureldin
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What's the common practice of managing the external IP of a docker swarm?

I am creating a docker swarm with 3 managers and 2 workers. A service is running in the swarm and exposes port 80. So we can hit the service with any node's ip. But what if the node goes down? Expecting a user always to try another node's ip would…
wei
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Docker nginx: Redirects to port 80 instead of mapped port

I am making this wordpress solution and for "dieting" reasons I am moving into alpine-based images. On this I managed to use an external configuration (file) and via volume I pass it into nginx. server { listen 80; root /var/www/html; index…
Dimitrios Desyllas
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Web server benchmark - explanation of results?

I made a small benchmark, in which I compare Apache HTTP server deployed to the Virtualbox, and Apache HTTP in Docker (official Alpine and Debian based images) deployed to the Virtualbox. The results of average requests per second are in the…
Petr Filip
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Fedora 26: Docker, NetworkManager, dnsmasq startup order

I am using Docker with Consul. I have configured NetworkManager to use dnsmasq and I configured dnsmasq to listen on the Docker interface docker0. When the machine is booting, dnsmasq cannot find the docker0 interface. When the system is booted up…
Thorsten Boock
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Docker ARG missing from CMD (17.06.0-ce)

In my Dockerfile, I define ARG values and use them successfully in RUN commands. However, in my CMD the ARG value does not appear. Dockerfile: FROM anapsix/alpine-java:8 MAINTAINER xxx@yyy.com ARG NAME=UNSET CMD echo NAME is…
Howard M. Lewis Ship
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Nginx by default running on DigitalOcean Ubuntu 16.04

Background So yesterday I was playing around with our server. On it we have a docker-compose process running 6 or so containers, one of them being Nginx. Before I played around with it yesterday it was serving files just fine. What I did I noticed…
Andrew Graham-Yooll
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How can I enable containerization on Windows Server 2012?

I would like to deploy our microservices on a Windows Server 2012 installed machine. How can I enable containerization on that machine? On the Internet, the technical guides generally folds in two favors. One is for container technology on Linux…
The_Cute_Hedgehog
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