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en:guides:chroot [2010/03/19 21:22] gokhlayeh Add chroot guide |
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| ====== Chroot ======= | ====== Chroot ======= | ||
| - | This guide explain how to setup a chroot to cook packages in a separate environnment. The chroot can be build on a USB or HDD device to save RAM when using live session. There is also a script wich remove all packages installed during cooking at exit in order to keep the chroot light and check build_depends. | + | This guide explain how to setup a chroot to cook packages in a separate environment. The chroot can be built on a USB or HDD device to save RAM when using a live session. There is also a script which removes any packages installed during cooking on exit in order to keep the chroot light and also checks the build_depends. |
| + | |||
| + | ===== With Tazdev ===== | ||
| + | |||
| + | Over time the SliTaz developers created tools for the automation of various tasks. The slitaz-dev-tools package provides the tazdev utility and its configuration file /etc/slitaz/tazdev.conf; it can create a chroot to use: | ||
| + | |||
| + | <code> | ||
| + | # tazpkg get-install slitaz-dev-tools | ||
| + | # tazdev gen-chroot | ||
| + | # tazdev chroot | ||
| + | </code> | ||
| + | |||
| + | By default the chroot is created in ///home/slitaz/cooking/chroot// and is slitaz-based. For more info and available commands you can use 'tazdev usage' and/or take a look at the configuration file. | ||
| ===== Create the chroot ===== | ===== Create the chroot ===== | ||
| - | <code>mkdir /home/chroot | + | <file> |
| + | #!/bin/sh | ||
| + | mkdir /home/chroot | ||
| # You can mount a device to /home/chroot | # You can mount a device to /home/chroot | ||
| # with mountbox or mount | # with mountbox or mount | ||
| Line 13: | Line 27: | ||
| tazpkg get-install tazpkg --root="/home/chroot" | tazpkg get-install tazpkg --root="/home/chroot" | ||
| tazpkg get-install lzma --root="/home/chroot" | tazpkg get-install lzma --root="/home/chroot" | ||
| - | mkdir /home/chroot/home/slitaz</code> | + | mkdir /home/chroot/home/slitaz</file> |
| - | Note : you can keep theses lines in a script file if needed. Just add #!/bin/sh in first line and make executable with : | + | Note, you can keep these lines in a script file if needed. Just add #!/bin/sh to the first line and make executable with: |
| - | <code>chmod +x script_file</code> | + | <code># chmod +x script_file</code> |
| ===== Add a script file to automate some actions ===== | ===== Add a script file to automate some actions ===== | ||
| - | <code>cat > /home/chroot/chroot_script.sh << "EOF" | + | <code># cat > /home/chroot/chroot_script.sh << "EOF"</code> |
| + | <file> | ||
| #!/bin/sh | #!/bin/sh | ||
| /bin/sh --login | /bin/sh --login | ||
| Line 29: | Line 44: | ||
| EOF | EOF | ||
| - | chmod +x "/home/chroot/chroot_script.sh"</code> | + | </file> |
| + | <code># chmod +x "/home/chroot/chroot_script.sh"</code> | ||
| - | Note: /bin/sh --login log you in the chrooted environnment. The commands after that line auto-remove packages added when cooking at exit. You can hack this file to execute various automated actions when entering and exiting chroot. | + | Note, /bin/sh --login logs you into the chrooted environment. The commands after that auto-remove any packages added when cooking on exit. You can hack this file to execute various automated actions when entering and exiting the chroot. |
| ===== Add a script to mount and umount chroot ===== | ===== Add a script to mount and umount chroot ===== | ||
| - | <code>cat > /usr/bin/tazchroot << "EOF" | + | <code># cat > /usr/bin/tazchroot << "EOF"</code> |
| + | <file> | ||
| #!/bin/sh | #!/bin/sh | ||
| cat /etc/resolv.conf > /home/chroot/etc/resolv.conf | cat /etc/resolv.conf > /home/chroot/etc/resolv.conf | ||
| Line 47: | Line 64: | ||
| chroot /home/chroot ./chroot_script.sh | chroot /home/chroot ./chroot_script.sh | ||
| until [ "$ps" = "2" ]; do | until [ "$ps" = "2" ]; do | ||
| - | echo "Waiting for the end of all other chroot process..." | + | echo "Waiting for the end of all other chroot processes..." |
| ps=$(ps | grep `basename $0` | grep -v grep | grep -v basename | wc -l) | ps=$(ps | grep `basename $0` | grep -v grep | grep -v basename | wc -l) | ||
| sleep 1 | sleep 1 | ||
| Line 60: | Line 77: | ||
| fi | fi | ||
| EOF | EOF | ||
| - | chmod +x /usr/bin/tachroot</code> | + | </file> |
| + | <code># chmod +x /usr/bin/tazchroot</code> | ||
| + | |||
| + | Note, this script mounts ///home/slitaz// in your chroot, so you can use tazwok as if it was in your normal environment. | ||
| + | |||
| + | ---- | ||
| + | \\ | ||
| + | ^ Page Review Section ^^ | ||
| + | |Quality| Good | | ||
| + | |Review| Minor Updates | | ||
| + | |Priority| Medium | | ||
| + | |Problems| add a [[http://forum.slitaz.org|forum post link]]| | ||
| + | |::: | OR add a [[http://labs.slitaz.org/issues |lab issue tracker link ]]| | ||
| + | |How to Improve| Suggest briefly| | ||
| + | |::: | | | ||
| - | Note : This script mount /home/slitaz in you're chroot, so you can use tazwok as if it is on you're normal environnment. | + | \\ |
| + | ---- | ||