virtual-machine

问题 I have a question regarding speed & performance of using multiple virtualized nodes in a single machine VS single node on the single machine itself. which one will perform better? The reason why I ask this question is because I am currently learning hadoop on a single machine, and I see some tutorials on the internet that shows the use of multiple virtualized nodes in a single machine. Thank you in advance 回答1: There is always some overhead that comes with virtualization, so unless really

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 8 years ago . I would like to learn how to write a small emulator/virtual machine. Does anyone know a good tutorial or a simpler project than qemu

问题 I am running docker in CentOS7. I'd like to change my basic directory from /var/lib/docker to /data/docker . I found this guide from official site, but do not know how to apply this to my case. I just make new daemon.json in /etc/docker/ . After that when I am trying to run daemon occurs an error. follow is systemctl status -l docker.service . ● docker.service - Docker Application Container Engine Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 6 years ago . When working with java/javaee usual development environment setup is to have everything locally (jdk installation, database, appserver

问题 I have a java application (jar file) that I want to be able to run from a docker image. I have created a Dockerfile to create an image using centos as base and install java as such: Dockerfile FROM centos RUN yum install -y java-1.7.0-openjdk I ran docker build -t me/java7 after to obtain the image me/java7 however I am stuck at some dead ends. How do I copy the jar file from the host into the image/container I require 2 parameters. 1 is a file, which needs to be copied into a directory into

问题 I have a big repository in a shared folder. I use git from within a VM on that folder. Everything works nice, but the repository is big and git's searching through all directories and files when committing is slow. I cannot move this repository out of the shared folder. I tried to git add specific files and directories, but when I do git commit -m "something" it still goes off onto it's oddyssey through the directory tree. Can I do commits that ignore the rest of the tree? 回答1: You can try

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 3 years ago . okay so I am trying to isntall VMware tools from the command line with the tar installer using these instructions: http://www.vmware.com/support/ws5/doc/ws_newguest_tools_linux.html#wp1118025 I am installing vmware tools on lubuntu which I have running as a virtual machine using vmplayer. After step 5, when

问题 I imported the precise32 box, then installed some packages and other data on the VM. My plan is to then repackage it into a box, to save on complicated provisioning when sharing. However. vagrant package --base dev-vm --output /box/vm.box Always returns [dev-vm] VM not created . Moving on My directory structure is: -dev-vm --.vagrant --Logs --box.ovf --box-disk1.vmdk --dev-vm_13345342.vbpx --metadata.json --Vagrantfile Ive set VAGRANT_LOG=debug Which shows no extra info on whats going on.

问题 I deleted the directory that contained the .vagrant file. When I up a new VM it's complaining about ports being in use. So how do I destroy a VM without having it's .vagrant file? 回答1: The following VirtualBox commands might help. If poweroff doesn't work, try unregistervm. $ VBoxManage list runningvms $ VBoxManage controlvm <uuid> poweroff $ VBoxManage unregistervm <uuid> Source: https://support.cloud.engineyard.com/entries/21449637-I-deleted-Vagrantfile-vagrant-and-or-the-app-directory

问题 I was used VirtualBox manual setups with virtualenvs inside them to run Django projects on my local machine. Recently I discovered Vagrant and decided to switch to it, because it seems very easy and useful. But I can not figure - do I need still use virtualenv Vagrant VM, is it encouraged practice or forbidden? 回答1: If you run one vagrant VM per project, then there is no direct reason to use virtualenv. If other contributors do not use vagrant, but do use virtualenv, then you might want to