lxc

Whenever I run a docker container, I see that it uses a random MAC address: eth0 Link encap:Ethernet HWaddr de:6f:de:74:bd:d9 How do I set a specific MAC address for a container run? Will I be able to have multiple containers running simultaneously with the same MAC address? These containers do not need to access the outside network and do not need to talk to each other. Newer versions of docker take a --mac-address=12:34:56:78:9a:bc switch to docker run . root@kevin-VirtualBox:~# sudo docker run --rm --mac-address"=12:34:de:b0:6b:61" ubuntu ifconfig | grep HWaddr eth0 Link encap:Ethernet

While going through docker docs, I found that docker is now using libcontainer instead of LXC. Has anyone idea about how libcontainer is better ( If so..) than LXC ? Linux Containers (LXC) was used before docker 0.9 (On March 13, 2014, with the release of version 0.9 , Docker dropped LXC as the default execution environment and replaced it with its own libcontainer library) as one execution driver by docker, and offered a userspace interface for the Linux kernel containment features. It is very specific to Linux libcontainer (now opencontainers/runc ) is an abstraction, in order to support a

first thing first. my system info and versions: $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 13.04 Release: 13.04 Codename: raring $ sudo docker version Client version: 0.9.0 Go version (client): go1.2.1 Git commit (client): 2b3fdf2 Server version: 0.9.0 Git commit (server): 2b3fdf2 Go version (server): go1.2.1 $ lxc-version lxc version: 0.9.0 $ uname -a Linux ip-10-0-2-86 3.8.0-19-generic #29-Ubuntu SMP Wed Apr 17 18:16:28 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux I am not able to stop a container after the process inside of it becomes a zombie.

I just can't create and run new containers in Docker anymore. But in the same time a can run previously created containers. When I try to do something like this: [user@host ~ ] docker run --name=fpm-5.3 debian:jessie 2014/07/12 07:34:08 Error: Error running DeviceCreate (createSnapDevice) dm_task_run failed From docker.log : 2014/07/12 05:57:11 POST /v1.12/containers/create?name=fpm-5.3 [f56fcb6f] +job create(fpm-5.3) Error running DeviceCreate (createSnapDevice) dm_task_run failed [f56fcb6f] -job create(fpm-5.3) = ERR (1) [error] server.go:1025 Error: Error running DeviceCreate

一、简介 1、了解Docker的前生LXC LXC为Linux Container的简写。可以提供轻量级的虚拟化，以便隔离进程和资源，而且不需要提供指令解释机制以及全虚拟化的其他复杂性。相当于C++中的NameSpace。容器有效地将由单个操作系统管理的资源划分到孤立的组中，以更好地在孤立的组之间平衡有冲突的资源使用需求。 与传统虚拟化技术相比，它的优势在于： （1）与宿主机使用同一个内核，性能损耗小； （2）不需要指令级模拟； （3）不需要即时(Just-in-time)编译； （4）容器可以在CPU核心的本地运行指令，不需要任何专门的解释机制； （5）避免了准虚拟化和系统调用替换中的复杂性； （6）轻量级隔离，在隔离的同时还提供共享机制，以实现容器与宿主机的资源共享。 总结：Linux Container是一种轻量级的虚拟化的手段。 Linux Container提供了在单一可控主机节点上支持多个相互隔离的server container同时执行的机制。Linux Container有点像chroot，提供了一个拥有自己进程和网络空间的虚拟环境，但又有别于虚拟机，因为lxc是一种操作系统层次上的资源的虚拟化。 2、LXC与docker什么关系？ docker并不是LXC替代品，docker底层使用了LXC来实现，LXC将linux进程沙盒化，使得进程之间相互隔离

I understand that docker containers are portable between docker hosts, but I am confused about the relationship with the Base Image and the host. From the documentation on Images , it appears that you would have a much heavier footprint (akin to multiple VMs) on the host machine if you had a variety of base images running. Is this assumption correct? GOOD : Many containers sharing a single base image. BAD : Many containers running separate/unique base images. I'm sure a lot of this confusion comes from my lack of knowledge of LXC. I am confused about the relationship with the Base Image and

According to this github issue it should be possible to start a full container with Upstart, cron etc. with Docker 0.6 or later but how do I do that? I was expecting that docker run -t -i ubuntu /sbin/init would work just like lxc-start -n ubuntu /sbin/init and I would get a login screen, but instead it displays nothing. I also tried to access it using ssh, but no luck. I'm using the default ubuntu image from Docker index. docker run ubuntu /sbin/init appears to work flawlessly for me with 0.6.6. You won't get a login screen because Docker only manages the process. Instead, you can use docker

Docker的学习之路： 个人对docker技术算是挺感兴趣吧，将docker好好总结了一下，在下面去介绍。难点就是要分清容器—仓库—镜像之间的关系，其他都还好，不难理解，也挺有意思。2048游戏的引入，让docker技术更加容易被理解。 Docker：爱不释手的容器技术 文章目录 Docker的学习之路： Docker：爱不释手的容器技术 一个完整的Docker有以下几个部分组成： Docker 架构 特性：在docker的网站上提到了docker的典型场景： 局限：Docker并不是全能的，设计之初也不是KVM之类虚拟化手段的替代品，简单总结几点： namespace: lxc: LXC的实现 传统虚拟化和容器技术对比： docker演示：实验环境： Docker： 2048游戏的产生： docker 跑ubuntu操作系统： 镜像分层结构： Docker 构建镜像： 一：load方法： 二：bulid方法： Docker httpd服务镜像构建： Docker nginx镜像构建： 镜像优化： 来自百度：Docker 是一个开源的应用容器引擎，让开发者可以打包他们的应用以及依赖包到一个可移植的镜像中，然后发布到任何流行的 Linux或Windows 机器上，也可以实现虚拟化。容器是完全使用沙箱机制，相互之间不会有任何接口。 一个完整的Docker有以下几个部分组成： 1