lxc

LXC介绍 linux container(LXC)就是一种操作系统级的虚拟化技术。是基于Linux操作系统的虚拟化技术，翻译为linux 容器。它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。 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。与虚拟化相比，这样既不需要指令级模拟，也不需要即时编译。容器可以在核心 CPU 本地运行指令，而不需要任何专门的解释机制。此外，也避免了半虚拟化和系统调用替换中的复杂性。通过提供一种创建和进入容器的方式，操作系统让应用程序就像在独立的机器上运行一样，但又能共享很多底层的资源。例如，可以有效地共享公共文件（比如 glibc）的页缓存，因为所有容器都使用相同的内核，而且所有容器还常常共享相同的 libc 库（取决于容器配置）。这种共享常常可以扩展到目录中其他不需要写入内容的文件。 容器在提供隔离的同时，还通过共享这些资源节省开销，这意味着容器比真正的虚拟化的开销要小得多。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，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。LXC 通过利用内核的CGroup来提供用户空间的对象

When I am running code on a container it cores I am not able to locate it on my container(or the core file is not being stored). ulimit -c is set to unlimited /proc/sys/kernel/core_pattern is set to |/usr/share/apport/apport %p %s %c %P (what is the meaning of | ?) Do I need to make any changes in/to the host system? | indicates that a program should handle the core dump. Rather than saving the coredump to a file it will be piped into that programs input. Means if core_pattern is set to |... apport apport will handle the core dumps. Unfortunately apport will create coredumps only for installed

I have minimal Ubuntu installation in my container and I want to have Xserver running. I need XServer, because my app requires meshlabserver, which itself needs Xserver. I installed xserver-xorg and all other packages, but when I try to start X in container via /usr/bin/X :0 it says: Fatal server error: (EE) xf86OpenConsole: Cannot open /dev/tty0 (No such file or directory) What am I doing wrong? How do I start X server? UPDATE: related question: Host screen turns off when I start X server in docker container In my case it works nicely when I start container in privileged mode: docker run -

My system has two partitions: 5G main partition where Ubuntu is installed 100G side partition at /mnt/eda that I'd like to use for Docker container runs I need to start multiple Docker containers that will take up >10G additional disk space after they're launched. I want them to use disk space form /mnt/eda , but how do I do that? Currently, whenever I import or run a container, space from my main partition is taken up. I tried downloading the binary and starting it from the side partition, but space from main partition was still being used up. I can't attach/mount drives to my containers --

I've been looking into Docker and I understand from this post that running multiple docker containers is meant to be fast because they share kernel level resources through the "LXC Host," however, I haven't found any documentation about how this relationship works that is specific to the docker configuration, and at what level are resources shared. What's the involvement of the Docker image and the Docker container with shared resources and how are resources shared? Edit: When talking about "the kernel" where resources are shared, which kernel is this? Does it refer to the host O.S (the level