Talk:Create Alpine Linux PV DomU - Revision history

Hpaluchpil: /* Using sparse file for backing /data/a1.img */ new section

2024-07-23T07:12:23Z

Using sparse file for backing /data/a1.img: new section

← Older revision		Revision as of 07:12, 23 July 2024
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	Can someone more knowledgeable about this setup fact check the reference to a grub-xenhost apk? I do not see such an apk in the repos.		Can someone more knowledgeable about this setup fact check the reference to a grub-xenhost apk? I do not see such an apk in the repos.
	[[User:Zcrayfish\|zcrayfish]] ([[User talk:Zcrayfish\|talk]]) 20:15, 18 August 2023 (UTC)		[[User:Zcrayfish\|zcrayfish]] ([[User talk:Zcrayfish\|talk]]) 20:15, 18 August 2023 (UTC)

			== Using sparse file for backing /data/a1.img ==

			To save both image creation time and disk space I suggest to rather create sparse file with command:

			truncate -s 3G /data/a1.img

			It will be instant (because no data blocks allocated) and it will occupy nearly zero bytes on disk (not counting metadata).
			To see allocated space one can use 'ls' with '-s'. Below is example after installing Alpine 3.20 DomU guest:

			$ ls -lhs /data/a1.img

			158.3M -rw-r--r-- 1 root root 3.0G Jul 23 08:51 /data/a1.img

			Only around 160MB is allocated by 'a1.img' of size 3GB.

Zcrayfish: /* apk add grub-xenhost */ new section

2023-08-18T20:15:23Z

apk add grub-xenhost: new section

← Older revision		Revision as of 20:15, 18 August 2023
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	--[[User:Raymi306\|Raymi306]] ([[User talk:Raymi306\|talk]]) 18:40, 22 January 2021 (UTC) -- END		--[[User:Raymi306\|Raymi306]] ([[User talk:Raymi306\|talk]]) 18:40, 22 January 2021 (UTC) -- END

			== apk add grub-xenhost ==

			Can someone more knowledgeable about this setup fact check the reference to a grub-xenhost apk? I do not see such an apk in the repos.
			[[User:Zcrayfish\|zcrayfish]] ([[User talk:Zcrayfish\|talk]]) 20:15, 18 August 2023 (UTC)

Zcrayfish: Gave each commenter their own section on the talk page to make it more readable. Comments now in chronological order.

2023-08-18T20:14:02Z

Gave each commenter their own section on the talk page to make it more readable. Comments now in chronological order.

@@ Line 1: / Line 1: @@
 This page was recommended by the Xen Beginners Guide as an example of a manual installation of a domU. It no longer works (at least on a Debian host) because it's based on legacy grub (grub1). I sorted out how to change it to work with grub2. Because I'm not a regular Alpine user, I thought it might be helpful to post proposed changes here in case there were comments before changing the page.
@@ Line 29: / Line 52: @@
 -- [[User:Davehill|Davehill]] ([[User talk:Davehill|talk]]) 16:53, 6 June 2020 (UTC)
+== Debian 10 Dom0 with Alpine Virtual 3.13 ==
 Today I tried following this tutorial on a Debian 10 Dom0 with Alpine Virtual 3.13. The issue I ran into was in the grub config:

Zcrayfish: Talk page cleanup: Removed user signature added to the wrong part of the talk page.

2023-08-18T20:08:32Z

Talk page cleanup: Removed user signature added to the wrong part of the talk page.

← Older revision		Revision as of 20:08, 18 August 2023
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	~~--[[User:Raymi306\|Raymi306]] ([[User talk:Raymi306\|talk]]) 18:40, 22 January 2021 (UTC) -- START~~

	Today I tried following this tutorial on a Debian 10 Dom0 with Alpine Virtual 3.13. The issue I ran into was in the grub config:		Today I tried following this tutorial on a Debian 10 Dom0 with Alpine Virtual 3.13. The issue I ran into was in the grub config:

Raymi306: Added comment on fix for Debian 10 Alpine-Virt 3.13

2021-01-22T18:41:20Z

Added comment on fix for Debian 10 Alpine-Virt 3.13

← Older revision		Revision as of 18:41, 22 January 2021
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	One more thing: didnt the local Xen god hack pygrub to be able to boot alpine directly?		One more thing: didnt the local Xen god hack pygrub to be able to boot alpine directly?
	This howto still assumes we need to save kernel somewhere, maybe we can instead pass them as arguments at first build. More complex but also more powerful.		This howto still assumes we need to save kernel somewhere, maybe we can instead pass them as arguments at first build. More complex but also more powerful.


			--[[User:Raymi306\|Raymi306]] ([[User talk:Raymi306\|talk]]) 18:40, 22 January 2021 (UTC) -- START

			Today I tried following this tutorial on a Debian 10 Dom0 with Alpine Virtual 3.13. The issue I ran into was in the grub config:


			menuentry 'alpine-xen' {
			set root=(xen/xvda,msdos1)
			linux /boot/vmlinuz-virt root=/dev/xvda3 modules=ext4
			initrd /boot/initramfs
			}

			After playing around in GRUB, I believe I just had to change the path from /boot/initramfs to /boot/initramfs-virt, the alpine version in this tutorial isn't current so I guess the name changed. I also wasn't interested in having it display the menu, so I changed the format to be like below:

			set root=(xen/xvda,msdos1)
			linux /boot/vmlinuz-virt root=/dev/xvda3 modules=ext4
			initrd /boot/initramfs-virt
			boot

			I used my logical volume group and replaced the target path in 'format=raw, vdev=xvda, access=w, target=/data/a1.img' to /dev/$VG_NAME/alpine-1 and everything appears to be working fine

			I haven't really done any wiki editing before but I wanted to at least put this out there, and hopefully get some feedback as to if others would like to edit the entry or would like me to edit the entry to try and convey some of this information

			--[[User:Raymi306\|Raymi306]] ([[User talk:Raymi306\|talk]]) 18:40, 22 January 2021 (UTC) -- END

Davehill at 16:53, 6 June 2020

2020-06-06T16:53:34Z

← Older revision		Revision as of 16:53, 6 June 2020
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	Comments welcome.		Comments welcome.

			-- [[User:Davehill\|Davehill]] ([[User talk:Davehill\|talk]]) 16:53, 6 June 2020 (UTC)

Davehill at 15:47, 3 June 2020

2020-06-03T15:47:20Z

← Older revision		Revision as of 15:47, 3 June 2020
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	This was recommended ~~as a manual installation~~ by the Xen Beginners Guide. It ~~didn't work~~ because it ~~seems to be~~ based on ~~GRUB1~~. Because I'm not a regular Alpine user, I thought it might be helpful to post proposed changes here ~~first~~.		This page was recommended by the Xen Beginners Guide as an example of a manual installation of a domU. It no longer works (at least on a Debian host) because it's based on legacy grub (grub1). I sorted out how to change it to work with grub2. Because I'm not a regular Alpine user, I thought it might be helpful to post proposed changes here in case there were comments before changing the page.

	So, I propose changing the content to make it work with pvgrub2. The biggest change would be to swap out the instructions to create menu.lst with instructions to create grub.cfg as follows:		So, I propose changing the content to make it work with pvgrub2. The biggest change would be to swap out the instructions to create menu.lst with instructions to create grub.cfg as follows:

	Before you reboot, mount the boot partition and create a {{path\|grub/grub.cfg}} file for pvgrub:<br/>		Before you reboot, mount the boot partition and create a {{path\|grub/grub.cfg}} file for pvgrub:<br/>
	{{cmd \| mount /dev/xvda1 /mnt		{{cmd \| mount /dev/xvda1 /mnt
	mkdir /mnt/grub}}		mkdir /mnt/grub}}
	Install a basic text editor like nano or vim:<br/>		Install a basic text editor like nano or vim:<br/>
	{{cmd \| apk add nano}}		{{cmd \| apk add nano}}

	If using nano, enter:<br/>		If using nano, enter:<br/>
	{{cmd \| nano /mnt/grub/grub.cfg}}		{{cmd \| nano /mnt/grub/grub.cfg}}

	Then add the following to create a basic grub2 configuration file:		Then add the following to create a basic grub2 configuration file:

Davehill at 15:37, 3 June 2020

2020-06-03T15:37:14Z

← Older revision		Revision as of 15:37, 3 June 2020
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	So, I propose changing the content to make it work with pvgrub2. The biggest change would be to swap out the instructions to create menu.lst with instructions to create grub.cfg as follows:		So, I propose changing the content to make it work with pvgrub2. The biggest change would be to swap out the instructions to create menu.lst with instructions to create grub.cfg as follows:

	Before you reboot, mount the boot partition and create a grub/grub.cfg file for pvgrub:<br/>		Before you reboot, mount the boot partition and create a {{path\|grub/grub.cfg}} file for pvgrub:<br/>
	~~<code>~~mount /dev/xvda1 /mnt~~</code>~~		{{cmd \| mount /dev/xvda1 /mnt
	~~<code>~~mkdir /mnt/grub~~</code>~~		mkdir /mnt/grub}}
	Install a basic text editor like nano or vim:<br/>		Install a basic text editor like nano or vim:<br/>
	~~<code>~~apk add nano~~</code>~~		{{cmd \| apk add nano}}

	If using nano, enter:<br/>		If using nano, enter:<br/>
	~~<code>~~nano /mnt/grub/grub.cfg~~</code>~~		{{cmd \| nano /mnt/grub/grub.cfg}}

	Then add the following to create a basic grub2 file:		Then add the following to create a basic grub2 configuration file:
	menuentry 'alpine-xen' {		{{cat \| /mnt/grub/grub.cfg \|<nowiki>menuentry 'alpine-xen' {
	set root=(xen/xvda,msdos1)		set root=(xen/xvda,msdos1)
	linux /boot/vmlinuz-virt root=/dev/xvda3 modules=ext4		linux /boot/vmlinuz-virt root=/dev/xvda3 modules=ext4
	initrd /boot/initramfs		initrd /boot/initramfs
	}		}</nowiki>}}

	Finally, Ctrl-S to save, Ctrl-X to exit nano.		Finally, Ctrl-S to save, Ctrl-X to exit nano.

Davehill at 15:16, 3 June 2020

2020-06-03T15:16:03Z

← Older revision		Revision as of 15:16, 3 June 2020
Line 3:		Line 3:
	So, I propose changing the content to make it work with pvgrub2. The biggest change would be to swap out the instructions to create menu.lst with instructions to create grub.cfg as follows:		So, I propose changing the content to make it work with pvgrub2. The biggest change would be to swap out the instructions to create menu.lst with instructions to create grub.cfg as follows:

	Before you reboot, mount the boot partition and create a grub/grub.cfg file for pvgrub:		Before you reboot, mount the boot partition and create a grub/grub.cfg file for pvgrub:<br/>
			<code>mount /dev/xvda1 /mnt</code>
			<code>mkdir /mnt/grub</code>
			Install a basic text editor like nano or vim:<br/>
			<code>apk add nano</code>

	~~mount~~ /~~dev~~/~~xvda1~~ /~~mnt~~		If using nano, enter:<br/>
			<code>nano /mnt/grub/grub.cfg</code>

	~~mkdir /mnt/grub~~		Then add the following to create a basic grub2 file:
			menuentry 'alpine-xen' {
	~~If vim or emacs are good with you, create the file below as /boot/grub/grub.cfg. If not, first install nano with:~~

	~~apk~~ add ~~nano~~

	~~If using vim or apt, you presumably already know what your doing.~~

	~~If using nano,~~ the ~~grub.cfg file should at least contain~~ a basic grub2 ~~file. Enter:~~

	~~nano /mnt/grub/grub.cfg~~

	~~then add the following to the new~~ file:

	menuentry 'alpine-xen' {
	set root=(xen/xvda,msdos1)		set root=(xen/xvda,msdos1)
	linux /boot/vmlinuz-virt root=/dev/xvda3 modules=ext4		linux /boot/vmlinuz-virt root=/dev/xvda3 modules=ext4
	initrd /boot/initramfs		initrd /boot/initramfs
	}		}
			Finally, Ctrl-S to save, Ctrl-X to exit nano.

	~~Ctrl-S to save, Ctrl-X to exit.~~

	~~(and then carry on with the instructions).~~

	I would add/change a few other small things: a bit more on pvgrub2, instructions to use LVM if that's set up in the host and a few more details around the initial installation process, etc.		I would add/change a few other small things: a bit more on pvgrub2, instructions to use LVM if that's set up in the host and a few more details around the initial installation process, etc.

Davehill: Replace menu.lst with grub.cfg

2020-06-03T04:24:11Z

Replace menu.lst with grub.cfg

← Older revision		Revision as of 04:24, 3 June 2020
Line 1:		Line 1:
			This was recommended as a manual installation by the Xen Beginners Guide. It didn't work because it seems to be based on GRUB1. Because I'm not a regular Alpine user, I thought it might be helpful to post proposed changes here first.

			So, I propose changing the content to make it work with pvgrub2. The biggest change would be to swap out the instructions to create menu.lst with instructions to create grub.cfg as follows:

			Before you reboot, mount the boot partition and create a grub/grub.cfg file for pvgrub:

			mount /dev/xvda1 /mnt

			mkdir /mnt/grub

			If vim or emacs are good with you, create the file below as /boot/grub/grub.cfg. If not, first install nano with:

			apk add nano

			If using vim or apt, you presumably already know what your doing.

			If using nano, the grub.cfg file should at least contain a basic grub2 file. Enter:

			nano /mnt/grub/grub.cfg

			then add the following to the new file:

			menuentry 'alpine-xen' {
			set root=(xen/xvda,msdos1)
			linux /boot/vmlinuz-virt root=/dev/xvda3 modules=ext4
			initrd /boot/initramfs
			}

			Ctrl-S to save, Ctrl-X to exit.

			(and then carry on with the instructions).

			I would add/change a few other small things: a bit more on pvgrub2, instructions to use LVM if that's set up in the host and a few more details around the initial installation process, etc.

			Comments welcome.




	I had problems booting a 32bit Alpine domU on a OracleVM 2.2.2 (64bit) host - most probably since the Alpine kernel uses PVops.<br />		I had problems booting a 32bit Alpine domU on a OracleVM 2.2.2 (64bit) host - most probably since the Alpine kernel uses PVops.<br />