AutoDevReverseProxy/script/hostman.sh

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#!/usr/bin/env sh
# Configurable Variables
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[ -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"
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query_docker () {
echo $(curl --unix-socket $DOCKER_SOCK_PATH --silent -g http://v1.41/$1/json$2)
}
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get_host_list() {
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PROXY_HOST_CONF=""
CONTAINER_LIST=$(query_docker "containers" "?filters={%22network%22:[%22${NETWORK_NAME}%22],%22status%22:[%22running%22]}" | jq -cr '.[].Id')
for id in $CONTAINER_LIST
do
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# Query individual container to access relevant data
CONTAINER_DATA=$(query_docker "containers/${id}")
if $RESOLVE_LOCALHOST
then
HOST_IP=$(echo $CONTAINER_DATA | jq -cr '.NetworkSettings.Networks.proxy.IPAddress')
else
HOST_IP="127.0.0.1"
fi
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# Filter Env for HOSTNAME, remove list parenthesis and split/only keep values
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HOST_NAMES=$(echo $CONTAINER_DATA | jq -cr ".Config.Env[] | select(contains(\"$DOCKER_HOSTNAME_VAR=\")) | split(\"=\")[1]")
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for hostname in $HOST_NAMES
do
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PROXY_HOST_CONF="$PROXY_HOST_CONF\n$HOST_IP $hostname # Added by hostman"
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done
done
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echo $PROXY_HOST_CONF
}
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while true
do
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FILTERED_HOSTS=$(grep -ve "# Added by hostman$" $HOST_CONF_PATH)
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echo -e "$FILTERED_HOSTS$(get_host_list)" > $HOST_CONF_PATH
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sleep 10
done