Difference between pages "LXC Fun" and "Package talk:Wordpress"

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(Created page with "== fix me == resolved on laptop: *suggest a good responsive theme, unresolved: *suggest google analytics, *suggest "add this" for social sharing stuff, *show how to hook...")
 
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Linux Containers, or LXC, is a Linux feature that allows Linux to run one or more isolated virtual systems (with their own network interfaces, process namespace, user namespace, and power state) using a single Linux kernel on a single server.  To learn more take a look at the [[LXC]] article.
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== fix me ==
  
In this Howto you will be shown how to create containers, how to start, stop, freeze and unfreeze them and also some more fun parts like snapshoting and clonig. To have all this working you will have to have your lxc store (/var/lib/lxc/ and /var/lib/lxcsnaps) to be on a '''btrfs filesystem'''.
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resolved on laptop:
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*suggest a good responsive theme,
  
__TOC__
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unresolved:
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*suggest google analytics,
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*suggest "add this" for social sharing stuff,
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*show how to hook into wordpress's rss
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*fix varnish for more concurrent connections, and a mode to dial those back for if its directly accepting http requests, and find decent plugin for it,
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*w3 total cache for minification of resources so on......  add a why use funtoo or some garbage to such a page if it exists...
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* find decent youtube plugin
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* find decent disqus plugin
  
== Creating containers ==
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just a little check list for me to butter this page up with =D [[User:Threesixes|Threesixes]] ([[User talk:Threesixes|talk]]) 09:41, November 15, 2014 (UTC)
Creating containers is quite easy using lxc-templates. They are located in the /usr/share/lxc/templates directory. You can find there many distributions like archlinux, centos, debian, fedora, opensuse, ubuntu, gentoo and some more. There is also an inofficial funtoo template that can be found at https://github.com/golodhrim/lxc-funtoo/blob/master/lxc-funtoo. The script creates funtoo container, however I was not able to use it with lxc-create script from the lxc utils. You have to run it as a stand-alone script.
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So how do you create other containers? I am going to use a debian container for this purpose. You will have to emerge debootstrap.
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<console>
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###i## emerge -av debootstrap
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* IMPORTANT: 8 news items need reading for repository 'gentoo'.
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* Use eselect news to read news items.
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These are the packages that would be merged, in order:
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Calculating dependencies... done!
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[ebuild  N    ] dev-perl/TimeDate-2.300.0  31 kB
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[ebuild  N    ] app-arch/dpkg-1.17.10  USE="bzip2 lzma nls unicode update-alternatives zlib -dselect {-test}" 4,100 kB
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[ebuild  N    ] dev-util/debootstrap-1.0.59  96 kB
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Total: 3 packages (3 new), Size of downloads: 4,226 kB
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Would you like to merge these packages? [Yes/No]
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</console>
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After installing debootstrap, you can create your debian container using:
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<console>
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###i## lxc-create -B btrfs -n vm1 -t debian
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debootstrap is /usr/bin/debootstrap
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Checking cache download in /var/cache/lxc/debian/rootfs-wheezy-armhf ...
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Copying rootfs to /var/lib/lxc/vm1/rootfs...Generating locales (this might take a while)...
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  en_US.UTF-8... done
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Generation complete.
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update-rc.d: using dependency based boot sequencing
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update-rc.d: using dependency based boot sequencing
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update-rc.d: using dependency based boot sequencing
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update-rc.d: using dependency based boot sequencing
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Creating SSH2 RSA key; this may take some time ...
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Creating SSH2 DSA key; this may take some time ...
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Creating SSH2 ECDSA key; this may take some time ...
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invoke-rc.d: policy-rc.d denied execution of restart.
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Timezone in container is not configured. Adjust it manually.
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Root password is 'root', please change !
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</console>
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We will see that the lxc-create command created a subvolume on BTRFS backing file system.
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<console>
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###i## btrfs sub list /
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---- snip ----
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ID 1143 gen 437 top level 5 path /var/lib/lxc/vm1/rootfs
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---- snip ----
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</console>
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Now you are ready to do all the fun stuff with your LXCs.
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== Starting/stoping containers ==
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To start a previously created container use the lxc utils:
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<console>
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###i## lxc-start -n vm1 -d
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###i## lxc-info -n vm1
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Name:          vm1
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State:          RUNNING
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PID:            29742
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IP:            172.16.65.234
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CPU use:        2.92 seconds
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BlkIO use:      260.00 KiB
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Memory use:    2.99 MiB
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KMem use:      0 bytes
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Link:          vethTN4NGU
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TX bytes:      2.33 KiB
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RX bytes:      39.54 KiB
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Total bytes:  41.87 KiB
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###i## lxc-attach -n vm1
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###r## root@vm1:~#
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###r## root@vm1:~# exit
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###i## lxc-stop -n vm1
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Name:          vm1
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State:          STOPPED
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</console>
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== Freezing/unfreezing containers ==
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The command lxc-freeze freezes all the processes running inside the container.  The processes will be blocked until they are explicitly thawed by the lxc-unfreeze command. To freeze a previously started container use the lxc utils:
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<console>
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###i## lxc-freeze -n vm1
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###i## lxc-info -n vm1
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Name:          vm1
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State:          FROZEN
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PID:            6817
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IP:            172.16.65.234
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CPU use:        2.78 seconds
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BlkIO use:      0 bytes
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Memory use:    2.47 MiB
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KMem use:      0 bytes
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Link:          veth7E1J8R
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TX bytes:      1.45 KiB
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RX bytes:      3.85 KiB
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Total bytes:  5.31 KiB
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###i## lxc-unfreeze -n vm1
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###i## lxc-info -n vm1
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Name:          vm1
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State:          RUNNING
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PID:            6817
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IP:            172.16.65.234
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CPU use:        2.78 seconds
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BlkIO use:      0 bytes
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Memory use:    2.47 MiB
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KMem use:      0 bytes
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Link:          veth7E1J8R
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TX bytes:      1.58 KiB
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RX bytes:      11.13 KiB
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Total bytes:  12.71 KiB
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</console>
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== Clones and snapshots  ==
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... tbc ...
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[[Category:Virtualization]]
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Revision as of 09:41, November 15, 2014

fix me

resolved on laptop:

  • suggest a good responsive theme,

unresolved:

  • suggest google analytics,
  • suggest "add this" for social sharing stuff,
  • show how to hook into wordpress's rss
  • fix varnish for more concurrent connections, and a mode to dial those back for if its directly accepting http requests, and find decent plugin for it,
  • w3 total cache for minification of resources so on...... add a why use funtoo or some garbage to such a page if it exists...
  • find decent youtube plugin
  • find decent disqus plugin

just a little check list for me to butter this page up with =D Threesixes (talk) 09:41, November 15, 2014 (UTC)