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#3 : Deterministically generate IP and MAC addresses from the container IDs

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Peter Wilmott 2015-07-24 00:01:42 +01:00
parent aa13b05e63
commit 0b5dc8b338
1 changed files with 17 additions and 17 deletions
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34
bocker
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@ -2,19 +2,16 @@
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';
function bocker_check() { function bocker_check() {
[[ "$1" == 'img' ]] && TYPE='image' if btrfs subvolume list "$btrfs_path" | grep -qw "$1"; then
[[ "$1" == 'ps' ]] && TYPE='container' echo 0
[[ "$1" == '' ]] && TYPE='container or image' else
if [[ "$2" == "$1"* ]]; then echo 1
if btrfs subvolume list "$btrfs_path" | grep -qw "$2"; then
return 0
fi fi
fi
echo "No $TYPE named '$2' exists" && exit 1
} }
function bocker_init() { #HELP Create an image:\nBOCKER init <image_directory> function bocker_init() { #HELP Create an image:\nBOCKER init <image_directory>
uuid="img_$(shuf -i 42002-42254 -n 1)"
if [[ -d "$1" ]]; then if [[ -d "$1" ]]; then
uuid="img_$(shuf -i 10000-99999 -n 1)" [[ "$(bocker_check "$uuid")" == 0 ]] && bocker_run "$@"
btrfs subvolume create "$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 "Created: $uuid" echo "Created: $uuid"
@ -23,7 +20,7 @@ else
fi fi
} }
function bocker_rm() { #HELP Delete an image or container:\nBOCKER rm <image_id or container_id> function bocker_rm() { #HELP Delete an image or container:\nBOCKER rm <image_id or container_id>
bocker_check '' "$1" [[ "$(bocker_check "$1")" == 1 ]] && echo "No container named '$1' exists" && exit 1
btrfs subvolume delete "$btrfs_path/$1" > /dev/null btrfs subvolume delete "$btrfs_path/$1" > /dev/null
echo "Removed: $1" echo "Removed: $1"
} }
@ -41,16 +38,18 @@ for ps in "$btrfs_path"/ps_*; do
done done
} }
function bocker_run() { #HELP Create a container:\nBOCKER run <image_id> <command function bocker_run() { #HELP Create a container:\nBOCKER run <image_id> <command
bocker_check 'img' "$1" uuid="ps_$(shuf -i 42002-42254 -n 1)";
cmd=${@:2} [[ "$(bocker_check "$1")" == 1 ]] && echo "No image named '$1' exists" && exit 1
uuid="ps_$(shuf -i 10000-99999 -n 1)" [[ "$(bocker_check "$uuid")" == 0 ]] && echo "UUID conflict, retrying..." && bocker_run "$@" && return
cmd=${@:2} && ip="$(echo "${uuid: -3}" | sed 's/0//g')" && mac="${uuid: -3:1}:${uuid: -2}"
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
ip link set veth0_"$uuid" master bridge0 ip link set veth0_"$uuid" master bridge0
ip netns add netns_"$uuid" ip netns add netns_"$uuid"
ip link set veth1_"$uuid" netns netns_"$uuid" ip link set veth1_"$uuid" netns netns_"$uuid"
ip netns exec netns_"$uuid" ip link set dev lo up ip netns exec netns_"$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_"$uuid" ip link set veth1_"$uuid" address 02:42:ac:11:00"$mac"
ip netns exec netns_"$uuid" ip addr add 10.0.0."$ip"/24 dev veth1_"$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/$uuid" > /dev/null
@ -63,12 +62,13 @@ ip link del dev veth0_"$uuid"
ip netns del netns_"$uuid" ip netns del netns_"$uuid"
} }
function bocker_logs() { #HELP View logs from a container:\nBOCKER logs <container_id> function bocker_logs() { #HELP View logs from a container:\nBOCKER logs <container_id>
bocker_check 'ps' "$1" [[ "$(bocker_check "$1")" == 1 ]] && echo "No container named '$1' exists" && exit 1
cat "$btrfs_path/$1/$1.log" cat "$btrfs_path/$1/$1.log"
} }
function bocker_commit() { #HELP Commit a container to an image:\nBOCKER commit <container_id> <image_id> function bocker_commit() { #HELP Commit a container to an image:\nBOCKER commit <container_id> <image_id>
bocker_check 'ps' "$1" && bocker_check 'img' "$2" && bocker_rm "$2" [[ "$(bocker_check "$1")" == 1 ]] && echo "No container named '$1' exists" && exit 1
btrfs subvolume snapshot "$btrfs_path/$1" "$btrfs_path/$2" > /dev/null [[ "$(bocker_check "$2")" == 1 ]] && echo "No image named '$1' exists" && exit 1
bocker_rm "$2" && btrfs subvolume snapshot "$btrfs_path/$1" "$btrfs_path/$2" > /dev/null
echo "Created: $2" echo "Created: $2"
} }
function bocker_help() { #HELP Display this message:\nBOCKER help function bocker_help() { #HELP Display this message:\nBOCKER help