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

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Docker for web hosting

I'm trying to understand the Docker system currently. Would Docker be a good system to use for modular web hosting on a few virtual private servers (and perhaps a few more later on)? I'm thinking ...
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Running multiple ubuntu (or other distro) inside Docker containers on CoreOS, is this efficient?

From what I have read I believe CoreOS to be a bare-bones Linux distribution which essentially facilitates running Docker containers that contain any applications or services that you require. From ...
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Destination host is unreachable

Points to Note I am installing cloudera 4.6.0 using docker in pseudo distributed mode. I have created two docker containers. One is for hadoop and another is for flume. I linked two containers as ...
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How to connect two docker containers running on the same host?

I have two docker containers running docker ps results CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 0bfd25abbfc6 ...
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Docker & Shorewall: Access container via localhost

This is kinda a follow-up to the excellent anwer of user fazy in this previous question: Docker & Shorewall I applied the configuration as described there but it doesn't seem to work with a ...
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Chaining two containers with docker

I have two containers that I have chained them together, so traffic that comes to container 2, first passes by container 1. I set container 2 --net=none. Host --- Container 1 --- Container 2 this is ...
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How to make a running Docker container aware of the other containers?

I have a distributed service managed on a server that requires client IP address to be set in a configuration file. For now, several client containers are started before the server, which is linked ...
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30 views

Is there a technology similar to Docker Containers for Windows Server?

Docker Containers (which is basically application isolation, afaik) look handy but they are only for Linux. Even "Docker Container for Windows" basically just installs a Linux VM into VirtualBox on ...
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Hide physical number of CPU cores from Docker container? [on hold]

We have a commercially licensed application that will run only a machine with up to 4 cores. Now we intend to put the application inside a Docker container in order to run it on a 12 core box. However ...
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1answer
41 views

How to deploy an application composed of Docker containers into the AWS cloud? [on hold]

What are the best practices for deploying Docker containers in production on Amazon Web Services cloud? What production-ready non-AWS specific orchestration tools would you use for continuous ...
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3answers
71 views

Transparent proxying a single docker container to another docker container

I have a pair of docker containers running on the host machine, these containers together makes my application fulfill. So for each iteration/instance of my application requires a pair of docker ...
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1answer
25 views

How do I resolve this locale issue?

I am working on setting up a Docker build that will allow me to connect to SQL Server from Linux. As far as I know that has almost nothing to do with this question, but it might, because I'm pretty ...
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1answer
34 views

The right way to keep docker container started when it used for periodic tasks

I have docker container with installed and configured software. There is no any programm supposed to be started/runned all the time. What I want - its ability to start some command depending on ...
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Docker container needs access to a few vlan interfaces on host

I have a debian box, with a lot of vlan interfaces iface vlan4003 inet static address 10.254.25.249 netmask 255.255.254.0 mtu 1500 vlan_raw_device eth1 iface vlan4004 inet static address ...
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29 views

Docker data volumes with couchbase

I have a docker image that runs Couchbase enterprise 3.0.2 It's in a private repository currently. So lets just say the name of it is: matt/couchbase In order to allow the data to persist should ...
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1answer
19 views

What is safe way to stop mysql docker container?

I run mysql container using Docker. I start it with like sudo docker -d --name mysql -p 3306:3306 -v /var/lib/mysql:/var/lib/mysql mysql_image I suspect that stopping mysql by stopping docker is ...
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CoreOS - Starting Docker containers on specific VLANs

This is an addition to this question about how to setup VLANs on CoreOS [CoreOS bare-metal vlan networking. My question after is after you set this up, how do you use it? How do you start a ...
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1answer
36 views

Docker container exits without any message

I'm trying to run xinetd in a Docker container. My Docker file is very basic: # voip-monitor # # VERSION 0.0.1 FROM ubuntu:14.04 RUN apt-get update && apt-get install -y ...
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tail -f not following log file in Docker container

I am seeing some strange behavior running the tail -f command inside a Docker container in CoreOS. There are a number of variables I can think of that may be contributing to the problem but I am not ...
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1answer
76 views

Postfix in Docker container not forwarding virtual aliases

I am trying to configure Postfix for the first time. I do not need mailboxes, I want only virtual aliases, forwarding info@example.com --> myname@gmail.com My Postfix is running in a Docker ...
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Adminer: how can I prefill login configuration?

I'm using Adminer in a docker container and it connects to a Postgres instance. I'd like it to have the connection params preconfigured. If possible, it should not be hardcoded but can be scriptable, ...
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53 views

CentOS 6.6 -> 7.0 Upgrade, Apache reverse proxy no longer correctly working

I am running a web application in Docker where the HTTP port 12020 is exposed. I moved my setup from CentOS 6.6 to 7.0 and now with the following virtual host configuration I can no longer reach the ...
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1answer
25 views

What Apache config do I need for Artifactory Docker support?

The Artifactory Docker documentation shows how to configure nginx as a reverse proxy but what's the equivalent Apache2 configuration? In particular what are the apache equivalents of the following ...
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16 views

Mesos kills container when requests increase

I deploy Docker containers on Mesos(0.21) and Marathon(0.7.6) on Google Cloud Engine (Ubuntu 14.04). I use JMeter to test a REST service that run on Marathon. When the concurrent requests are less ...
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Vsftpd don't work fine in passive mode in LXC container

I'm beginner in Docker, I have a vsftpd in a Debian and for passive mode I configured in vsftpd: pasv_enable=YES pasv_min_port=65000 pasv_max_port=65000 pasv_address=192.168.1.31 and I show with ...
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From docker containers to Google Kubernetes

This one is a little theoretical but please bear with me. Currently I have a server running a few Docker containers (4 or 5, depending on day and time). I plan to add another one, just like the ...
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How can I redirect virtualhosts (different domain) on the same port (443) to different internal ports? [closed]

I understand I can redirect HTTP traffic using Nginx. But what about non-HTTP traffic, Such as SSHD, etc? I'm asking because I have various dockerized services that will like to share the parent ...
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Docker non-root secure?

If I set up a Docker container on an Ubuntu server, and then let it run arbitrary/untrusted code like uploaded PHP, Python etc. as a NON-ROOT user. Is this totally contained and secure by ...
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1answer
64 views

OS docker container: what is the difference with a VM then?

What is the point of using an OS in a docker container? In the docker repository, you find an Ubuntu docker image: https://registry.hub.docker.com/_/ubuntu/ I thought Docker was more at the "app" ...
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1answer
38 views

Docker with a virtualized software firewall ahead

I'm currently working on a Docker setup and here is how I decided to think it : An Ubuntu host, which host : A KVM of an OpenBSD configured and acting as a firewall : The firewall will have it's ...
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1answer
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Block level backups of Docker volumes

I'm new to Docker and trying to evaluate methods and processes for doing backups on a CentOS host and container. From reading numerous articles about Docker backups, I've come to the following ...
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1answer
45 views

How to get php-fpm to log to stdout / stderr when running in a docker container

I have php-fpm in a docker container and in the Dockerfile I edit the fpm config file (/etc/php5/fpm/pool.d/www.conf) to set up access logs to go to /var/log/fpm-access.log and error logs to go to ...
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Dpkg dependency problems on Unpacking a package for Docker

I am building a debian package atlantis-builder.deb with folder structure as: - deb - DEBIAN - control - postinst - postrm - usr - bin ...
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1answer
28 views

Docker Push Broken with Nginx Proxy on Private Registry

I setup a private docker registry using the standard registry image and an nginx proxy for SSL and basic auth. When I push a docker image to the private registry, the image is uploaded, but tags are ...
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Docker remote access security

Assuming I am running several docker containers on a local server. When I give third parties ssh access to my server, any third party will have control over the docker manager. How can I make sure ...
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1answer
78 views

How to use nginx with coreos docker containers and fleet

I have three docker containers configured.. ghost - a custom docker container which runs my ghost blog ghost-data - docker container which holds all the persistent data.. content/* config.js, ...
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Nginx: How to use docker log collector when nginx is running under supervisord

The official nginx docker image (Dockerfile) uses the following trick to hand off its logs to stdout and stderr so that they are captured by the docker log collector and viewable using docker logs ...
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CoreOS / Docker “$ fleetctl satus my.service” - ssh: handshake failed

Digging in to CoreOS clusters with Docker and have come upon a SSH issue while trying to learn how to work with fleet. Deploying, running services etc goes well. SSH auth problem occure when executing ...
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Can't call the running rails app docker with boot2docker IP

I have been trying to test the Fig + Docker + Rails stack on my local machine which run MacOSX. All of my setups ( Dockerfile, Fig.yml ) and steps are exactly the same as demonstrated fig's official ...
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Docker: how to connect to a service that is linked only

I'm using the Postgres image that uses VOLUME to store data and doesn't expose ports to the outside but requires linking to connect to. I'm wondering if there's a way I can connect to this from the ...
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Slow disk performance in Docker container [migrated]

Problem I have some extremely slow disk IO within a Docker container. I'm using Boot2Docker, so i'm actually now wondering if the issue is vboxsf? Testing I used this script initially because I was ...
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install sharelatex with R / knitr support in docker

I'm trying to use sharelatex on my own server. Therefore I downloaded available docker images: https://github.com/tiagoboldt/sharelatex-docker https://github.com/cfriedline/docker-sharelatex Both ...
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1answer
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Update Docker container without downtime

Let's say I have a Docker container with a web server (like Apache 2). Now I want to update the OS under it. This SF answer says the best way is to rebuild the base image and my Apache image. But ...
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“__ANDROID_API__ undeclared” when trying to rebuild CentOS kernel

I have a basic docker image based on CentOS 6.5 (base, without updates). When I try to rebuild the kernel source rpm, I encounter the following errors: CHK -fstack-protector-all CHK ...
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1answer
70 views

why port forwarding is not working in this setup?

I'm trying to setup a docker virtualization environment. This is a follow up of this question. I have a virtual eth0:0 interface, and I would like to forward it using iptables. The public, main IP ...
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31 views

Docker-based infrastructure testing tool

I am currently trying to migrate a VM-based infrastructure to a Docker-based one and take the chance to add behavior testing to this infrastructure. So I aim to have all changes I make to the base ...
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2answers
206 views

Forward one IP to a docker container

As far as I understood, docker run containers with their own IPs, and fully open ports, on the bridge interface docker0. Let's say I launch a container, and it has its own IP: 172.17.0.11, and I have ...
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How do I inform HAProxy that my server is back up?

I'm a bit of a HAProxy newbie - I've got 3 docker containers, one running HAProxy with the following config: global log ...
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How do I set up docker containers to communicate on private network?

I have a small cluster at rackspace with a private network in the range 192.168.3.0/24. I would like my worker services to talk to each other using this network but can't figure out how to get docker ...
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1answer
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UDP Traffic from outside to docker container is dropped after container restart

following situation: i have a hardware box with Ubuntu 14.04LTS as host for docker 1.4 I'm running an ELK stack in several containers. Curenntly the logstash container is exposing only port 514 to ...