5617b1ae3e
# Why I did it Reduce the disk space taken up during bootup and runtime. # How I did it 1. Remove python package cache from the base image and from the containers. 2. During bootup, if logs are to be stored in memory, then don't create the `var-log.ext4` file just to delete it later during bootup. 3. For the partition containing `/host`, don't reserve any blocks for just the root user. This just makes sure all disk space is available for all users, if needed during upgrades (for example). * Remove pip2 and pip3 caches from some containers Only containers which appeared to have a significant pip cache size are included here. Signed-off-by: Saikrishna Arcot <sarcot@microsoft.com> * Don't create var-log.ext4 if we're storing logs in memory Signed-off-by: Saikrishna Arcot <sarcot@microsoft.com> * Run tune2fs on the device containing /host to not reserve any blocks for just the root user Signed-off-by: Saikrishna Arcot <sarcot@microsoft.com>
55 lines
1.4 KiB
Bash
55 lines
1.4 KiB
Bash
#!/bin/sh -e
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PREREQS=""
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prereqs() { echo "$PREREQS"; }
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case $1 in
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prereqs)
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prereqs
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exit 0
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;;
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esac
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logs_inram=false
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# Extract kernel parameters
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set -- $(cat /proc/cmdline)
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for x in "$@"; do
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case "$x" in
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varlog_size=*)
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varlog_size="${x#varlog_size=}"
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;;
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logs_inram=on)
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logs_inram=true
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;;
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esac
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done
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[ -z "$varlog_size" ] && exit 0
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# If logs are being stored in memory, then don't bother
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# creating the log file just to have it deleted afterwards.
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$logs_inram && exit 0
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# exit when the var_log.ext4 exists and the size matches
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if [ -e "${rootmnt}/host/disk-img/var-log.ext4" ]; then
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cur_varlog_size=$(ls -l ${rootmnt}/host/disk-img/var-log.ext4 | awk '{print $5}')
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if [ $cur_varlog_size == $((1024*1024*$varlog_size)) ]; then
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exit 0
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else
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rm -rf ${rootmnt}/host/disk-img
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fi
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fi
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# create varlog disk
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case "${ROOT}" in
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ubi*)
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# sys_fallocate is NOT supported over UBIFS
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mkdir -p ${rootmnt}/host/disk-img && ${rootmnt}/usr/bin/truncate -s "$varlog_size"M ${rootmnt}/host/disk-img/var-log.ext4 && mkfs.ext4 -q -F ${rootmnt}/host/disk-img/var-log.ext4
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;;
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*)
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mkdir -p ${rootmnt}/host/disk-img && ${rootmnt}/usr/bin/fallocate -l "$varlog_size"M ${rootmnt}/host/disk-img/var-log.ext4 && mkfs.ext4 -q -F ${rootmnt}/host/disk-img/var-log.ext4
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;;
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esac
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