AutoDevReverseProxy/script/hostman.sh
2022-11-18 09:45:24 +01:00

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#!/usr/bin/env sh
# Configurable Variables
[ -z $DOCKER_SOCK_PATH ] && DOCKER_SOCK_PATH="/tmp/docker.sock"
[ -z $NETWORK_NAME ] && NETWORK_NAME="proxy"
[ -z $RESOLVE_DOCKERHOST ] && RESOLVE_DOCKERHOST=false
[ -z $HOST_CONF_PATH ] && HOST_CONF_PATH="/tmp/hosts"
[ -z $DOCKER_HOSTNAME_VAR ] && DOCKER_HOSTNAME_VAR="VIRTUAL_HOST"
query_docker () {
curl --unix-socket $DOCKER_SOCK_PATH --silent -g http://v1.41/$1$2
}
get_host_list() {
PROXY_HOST_CONF=""
CONTAINER_LIST=$(query_docker "containers/json" "?filters={%22network%22:[%22${NETWORK_NAME}%22],%22status%22:[%22running%22]}" | jq -cr '.[].Id')
for id in $CONTAINER_LIST
do
# Query individual container to access relevant data
CONTAINER_DATA=$(query_docker "containers/${id}/json")
if $RESOLVE_DOCKERHOST
then
HOST_IP=$(echo $CONTAINER_DATA | jq -cr '.NetworkSettings.Networks.proxy.IPAddress')
else
HOST_IP="127.0.0.1"
fi
# Filter Env for HOSTNAME, remove list parenthesis and split/only keep values
HOST_NAMES=$(echo $CONTAINER_DATA | jq -cr ".Config.Env[] | select(contains(\"$DOCKER_HOSTNAME_VAR=\")) | split(\"=\")[1]")
for hostname in $HOST_NAMES
do
PROXY_HOST_CONF="$PROXY_HOST_CONF\n$HOST_IP $hostname # Added by hostman"
done
done
echo $PROXY_HOST_CONF
}
update_host_list() {
FILTERED_HOSTS=$(grep -ve "# Added by hostman$" $HOST_CONF_PATH)
echo -e "$FILTERED_HOSTS$(get_host_list)" > $HOST_CONF_PATH
}
update_host_list
# cannot filter because reailine no longer recognized lines otherwise (check how IFS changes)
query_docker "events" | while true
do
read -r;
# wait for related events to finish
while [ $? -eq 0 ]
do
read -t 5 -r;
done
update_host_list
done