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b6cb412309
Allows appending another initrd. Also build initrd on tmpfs as should be a bit faster now we have to do another copy. Fix #618 Signed-off-by: Justin Cormack <justin.cormack@docker.com>
63 lines
1.1 KiB
Bash
Executable File
63 lines
1.1 KiB
Bash
Executable File
#!/bin/sh
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set -e
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rm -rf /tmp/*
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for f in $(ls | grep -vE 'dev|sys|proc|tmp|export|mnt')
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do
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cp -a $f /tmp
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done
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mkdir -m 555 /tmp/dev /tmp/proc /tmp/sys /tmp/mnt
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mkdir -m 1777 /tmp/tmp
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# these three files are bind mounted in by docker so they are not what we want
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cat << EOF > /tmp/etc/hosts
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127.0.0.1 localhost
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::1 localhost ip6-localhost ip6-loopback
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fe00::0 ip6-localnet
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ff00::0 ip6-mcastprefix
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ff02::1 ip6-allnodes
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ff02::2 ip6-allrouters
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EOF
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cat << EOF > /tmp/etc/resolv.conf
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nameserver 8.8.8.8
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nameserver 8.8.4.4
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nameserver 2001:4860:4860::8888
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nameserver 2001:4860:4860::8844
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EOF
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printf 'moby' > /tmp/etc/hostname
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cd /tmp
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rm mkinitrd.sh
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find . | cpio -H newc -o | gzip -9 > /initrd/initrd.img
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cd /initrd
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SIZE=$(stat -c "%s" initrd.img)
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SIZE4=$(( $SIZE / 4 \* 4 ))
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DIFF=$(( $SIZE - $SIZE4 ))
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[ $DIFF -ne 0 ] && DIFF=$(( 4 - $DIFF ))
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dd if=/dev/zero bs=1 count=$DIFF of=zeropad
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cat zeropad >> initrd.img
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SIZE=$(stat -c "%s" initrd.img)
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SIZE4=$(( $SIZE / 4 \* 4 ))
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DIFF=$(( $SIZE - $SIZE4 ))
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if [ $DIFF -ne 0 ]
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then
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echo "Bad aligment" >2
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exit 1
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fi
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cat initrd.img
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