90 lines
2.7 KiB
Bash
Executable File
90 lines
2.7 KiB
Bash
Executable File
#!/bin/bash
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set -euo pipefail
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[[ 0 -eq "$#" ]] && set -- start
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ufw_docker_agent=ufw-docker-agent
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ufw_docker_agent_image="${ufw_docker_agent_image:-chaifeng/${ufw_docker_agent}:181003}"
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function ufw-update-service-instances() {
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id="$1"
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port="$2"
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declare -a opts
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[[ "$port" = deny ]] && opts+=(delete)
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opts+=(allow)
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[[ "$port" = @(all|deny) ]] && port=""
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docker ps -qf "label=com.docker.swarm.service.id=${id}" |
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while read name; do
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echo "$id $name $port"
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run-ufw-docker "${opts[@]}" "${name}" "$port"
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done
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}
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function update-ufw-rules() {
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declare -p | sed -e '/^declare -x ufw_public_/!d' \
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-e 's/^declare -x ufw_public_//' \
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-e 's/="/ /' \
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-e 's/"$//' |
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while read id port; do
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echo "${id}=$port"
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ufw-update-service-instances "${id}" "${port}"
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done
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}
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function run-ufw-docker() {
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declare -a docker_opts=(run --rm -t --name ufw-docker-agent-"${RANDOM}"-$(date '+%Y%m%d%H%M%S')
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--cap-add NET_ADMIN --network host
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--env UFW_DOCKER_FORCE_ADD=yes
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-v /var/run/docker.sock:/var/run/docker.sock
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-v /etc/ufw:/etc/ufw "${ufw_docker_agent_image}" "$@")
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docker "${docker_opts[@]}"
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}
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function get-service-name-of() {
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docker inspect "$1" --format '{{range $k,$v:=.Config.Labels}}{{ if eq $k "com.docker.swarm.service.name" }}{{$v}}{{end}}{{end}}' | grep -E "^.+\$"
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}
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function get-service-id-of() {
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docker inspect "$1" --format '{{range $k,$v:=.Config.Labels}}{{ if eq $k "com.docker.swarm.service.id" }}{{$v}}{{end}}{{end}}' | grep -E "^.+\$"
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}
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case "$1" in
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start)
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update-ufw-rules
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docker events --format '{{.Time}} {{.Status}} {{.Actor.Attributes.name}}' --filter 'scope=local' --filter 'type=container' |
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while read time status name; do
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echo "$time $status $name" >&2
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[[ -z "$name" ]] && continue
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[[ "$status" = @(kill|start) ]] || continue
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declare -n env_name="ufw_public_$(get-service-id-of "$name")"
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[[ -z "${env_name:-}" ]] && continue
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declare -a agent_opts=()
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if [[ "$status" = kill ]]; then
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agent_opts+=(delete allow "$name")
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fi
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run-ufw-docker "${agent_opts[@]}" >&2
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done
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sleep 60; exit 1
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;;
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delete|allow)
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ufw-docker "$@"
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;;
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update-ufw-rules)
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update-ufw-rules
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;;
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*)
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if [[ -f "$1" ]]; then
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exec "$@"
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else
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echo "Unknown parameters: $@" >&2
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exit 1
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fi
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esac
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