try to get rootfs url automatically

This commit is contained in:
James Swineson 2019-04-09 16:59:41 +08:00
parent 3717d58dd0
commit aa55c79205
2 changed files with 46 additions and 1 deletions

34
README.md Normal file
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@ -0,0 +1,34 @@
# menhera.sh
Start a RAM Linux system (Debian for now) without requiring physical access to your server.
With menhera.sh you can:
* format your system disk or create RAID
* install a new distro
* do important maintenance or backup with nobody writing to your root filesystem
* ...
with only SSH!
"menhera" is short for "mental healer".
## Dependencies
* Linux kernel: overlayfs and tmpfs support
* systemd
* squashfs-tools
* wget
## Usage
Just download and run.
## Known issues
* Cannot auto detect rootfs URL
## Thanks
* This project is inspired by [marcan/takeover.sh](https://github.com/marcan/takeover.sh)
* The major code came from [a maintenance writeup on my blog](https://blog.swineson.me/debian-9-csm-online-convert-root-partition-to-raid/) (in Simp. Chinese)
* [xTom.com](https://xtom.com/) donated a VPS for my testing

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@ -3,7 +3,7 @@ set -Eeuo pipefail
# config
WORKDIR="/tmp/menhera"
ROOTFS="https://images.linuxcontainers.org/images/debian/stretch/amd64/default/20190409_05:24/rootfs.squashfs"
ROOTFS=""
# internal global variables
OLDROOT="/"
@ -23,6 +23,16 @@ confirm() {
esac
}
get_rootfs() {
if [ -z ${ROOTFS+x} ]; then
echo "Getting rootfs URL..."
ROOTFS_TIME=$(curl "https://uk.images.linuxcontainers.org/images/debian/stretch/amd64/default/?C=M;O=D" | grep "folder.gif" | head -n 1 | cut -d'>' -f7 | cut -d'/' -f1)
ROOTFS="https://images.linuxcontainers.org/images/debian/stretch/amd64/default/${ROOTFS_TIME}/rootfs.squashfs"
else
echo "\$ROOTFS is set to '$ROOTFS'"
fi
}
sync_filesystem() {
echo "Syncing..."
sync
@ -135,6 +145,7 @@ echo -e "\tYou have closed all programs you can, and backed up all important dat
echo -e "\tYou can SSH into your system as root user"
confirm || exit -1
get_rootfs
sync_filesystem
prepare_environment