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9fe9e95349
Better split between content and tools. Signed-off-by: Justin Cormack <justin.cormack@docker.com>
47 lines
1.0 KiB
Bash
Executable File
47 lines
1.0 KiB
Bash
Executable File
#!/bin/sh
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set -e
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# arguments are image name
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# This script will output a tarball, suitable to be turned into a cpio archive
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# This is a bit hacky, should be improved later, as it hardcodes config.
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IMAGE="$1"; shift
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cd /tmp
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# extract rootfs
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EXCLUDE="--exclude .dockerenv --exclude Dockerfile \
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--exclude dev/console --exclude dev/pts --exclude dev/shm \
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--exclude etc/hostname --exclude etc/hosts --exclude etc/mtab --exclude etc/resolv.conf"
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CONTAINER="$(docker create $IMAGE /dev/null)"
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docker export "$CONTAINER" | tar -xf - $EXCLUDE
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docker rm "$CONTAINER" > /dev/null
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# these three files are bind mounted in by docker so they are not what we want
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mkdir -p etc
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cat << EOF > 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 > 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' > etc/hostname
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ln -s /proc/mounts etc/mtab
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tar cf - .
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