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