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Implement 'bocker commit', getting short on lines here 😰

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Peter Wilmott 2015-07-21 22:11:41 +01:00
parent fa5a5fe8f1
commit c6ce6655e0
1 changed files with 30 additions and 31 deletions
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59
bocker
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@ -1,51 +1,47 @@
#!/usr/bin/env bash #!/usr/bin/env bash
set -o errexit -o nounset -o pipefail; shopt -s nullglob set -o errexit -o nounset -o pipefail; shopt -s nullglob
btrfs_path='/var/bocker';
btrfs_path='/var/bocker'; basename=$(which basename); btrfs=$(which btrfs); function CHECK() {
cat=$(which cat); unshare=$(which unshare); chroot=$(which chroot) [[ "$1" == 'img' ]] && TYPE='image'
[[ "$1" == 'ps' ]] && TYPE='container'
function CHECK_VOLUME() { [[ "$1" == '' ]] && TYPE='container or image'
if $btrfs subvolume list "$btrfs_path" | grep -qw "$1"; then if [[ "$2" == "$1"* ]]; then
if btrfs subvolume list "$btrfs_path" | grep -qw "$2"; then
return 0 return 0
else fi
echo "No image named '$1' exists"
exit 1
fi fi
echo "No $TYPE named '$2' exists" && exit 1
} }
function INIT() { function INIT() {
if [[ -d "$1" ]]; then if [[ -d "$1" ]]; then
uuid="img_$(shuf -i 10000-99999 -n 1)" uuid="img_$(shuf -i 10000-99999 -n 1)"
$btrfs subvolume create "$btrfs_path/$uuid" > /dev/null btrfs subvolume create "$btrfs_path/$uuid" > /dev/null
cp -rf --reflink=auto "$1"/* "$btrfs_path/$uuid" > /dev/null cp -rf --reflink=auto "$1"/* "$btrfs_path/$uuid" > /dev/null
echo "$uuid" echo "Created: $uuid"
else else
echo "No directory named '$1' exists" echo "No directory named '$1' exists"
fi fi
} }
function RM() { function RM() {
CHECK_VOLUME "$1" CHECK '' "$1"
$btrfs subvolume delete "$btrfs_path/$1" > /dev/null btrfs subvolume delete "$btrfs_path/$1" > /dev/null
echo "Removed: $1"
} }
function IMAGES() { function IMAGES() {
echo -e "IMAGE_ID" echo -e "IMAGE_ID"
for img in "$btrfs_path"/img_*; do for img in "$btrfs_path"/img_*; do
$basename "$img" basename "$img"
done done
} }
function PS() { function PS() {
echo -e "CONTAINER_ID\t\tCOMMAND" echo -e "CONTAINER_ID\t\tCOMMAND"
for ps in "$btrfs_path"/ps_*; do for ps in "$btrfs_path"/ps_*; do
ps=$($basename "$ps") ps=$(basename "$ps")
echo -e "$ps\t\t$($cat "$btrfs_path/$ps/$ps.cmd")" echo -e "$ps\t\t$(cat "$btrfs_path/$ps/$ps.cmd")"
done done
} }
function RUN() { function RUN() {
CHECK_VOLUME "$1" CHECK 'img' "$1"
uuid="ps_$(shuf -i 10000-99999 -n 1)" uuid="ps_$(shuf -i 10000-99999 -n 1)"
ip link add dev veth0_"$uuid" type veth peer name veth1_"$uuid" ip link add dev veth0_"$uuid" type veth peer name veth1_"$uuid"
ip link set dev veth0_"$uuid" up ip link set dev veth0_"$uuid" up
@ -56,31 +52,33 @@ ip netns exec netns_"$uuid" ip link set dev lo up
ip netns exec netns_"$uuid" ip addr add 10.0.0.2/24 dev veth1_"$uuid" ip netns exec netns_"$uuid" ip addr add 10.0.0.2/24 dev veth1_"$uuid"
ip netns exec netns_"$uuid" ip link set dev veth1_"$uuid" up ip netns exec netns_"$uuid" ip link set dev veth1_"$uuid" up
ip netns exec netns_"$uuid" ip route add default via 10.0.0.1 ip netns exec netns_"$uuid" ip route add default via 10.0.0.1
$btrfs subvolume snapshot "$btrfs_path/$1" "$btrfs_path/$uuid" > /dev/null btrfs subvolume snapshot "$btrfs_path/$1" "$btrfs_path/$uuid" > /dev/null
echo 'nameserver 8.8.8.8' > "$btrfs_path/$uuid"/etc/resolv.conf echo 'nameserver 8.8.8.8' > "$btrfs_path/$uuid"/etc/resolv.conf
echo "$2" > "$btrfs_path/$uuid/$uuid.cmd" echo "$2" > "$btrfs_path/$uuid/$uuid.cmd"
ip netns exec netns_"$uuid" "$unshare" -fp --mount-proc "$chroot" \ ip netns exec netns_"$uuid" "unshare" -fp --mount-proc "chroot" \
"$btrfs_path/$uuid" /bin/sh -c "/bin/mount -t proc proc /proc && $2" \ "$btrfs_path/$uuid" /bin/sh -c "/bin/mount -t proc proc /proc && $2" \
2>&1 | tee "$btrfs_path/$uuid/$uuid.log" || true 2>&1 | tee "$btrfs_path/$uuid/$uuid.log" || true
ip link del dev veth0_"$uuid" ip link del dev veth0_"$uuid"
ip netns del netns_"$uuid" ip netns del netns_"$uuid"
} }
function LOGS() { function LOGS() {
CHECK_VOLUME "$1" CHECK 'ps' "$1"
$cat "$btrfs_path/$1/$1.log" cat "$btrfs_path/$1/$1.log"
}
function COMMIT() {
CHECK 'ps' "$1" && CHECK 'img' "$2" && RM "$2"
btrfs subvolume snapshot "$btrfs_path/$1" "$btrfs_path/$2" > /dev/null
echo "Created: $2"
} }
function HELP() { function HELP() {
echo -e "Create an image: \n\t./bocker init <image_directory>\n" echo -e "Create an image: \n\t./bocker init <image_directory>\n"
echo -e "List images: \n\t./bocker images\n" echo -e "List images: \n\t./bocker images\n"
echo -e "Create a container: \n\t./bocker run <image_id> <command>\n" echo -e "Create a container: \n\t./bocker run <image_id> <command>\n"
echo -e "List containers: \n\t./bocker ps\n" echo -e "List containers: \n\t./bocker ps\n"
echo -e "View logs from a container: \n\t./bocker logs <container_id>\n" echo -e "View logs from a container: \n\t./bocker logs <container_id>\n"
echo -e "Delete an image or container: \n\t./bocker rm <image_or_container_id>\n" echo -e "Delete an image or container: \n\t./bocker rm <image_or_container_id>"
exit 0 exit 0
} }
[[ -z "${1-}" ]] && HELP [[ -z "${1-}" ]] && HELP
case $1 in case $1 in
init) INIT "$2" ;; init) INIT "$2" ;;
@ -93,5 +91,6 @@ case $1 in
RUN "$IMAGE" "$*" RUN "$IMAGE" "$*"
;; ;;
logs) LOGS "$2" ;; logs) LOGS "$2" ;;
commit) COMMIT "$2" "$3" ;;
*) HELP ;; *) HELP ;;
esac esac