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283 lines
8.0 KiB
283 lines
8.0 KiB
#!/bin/sh /etc/rc.common
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USE_PROCD=1
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START=99
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extra_command "uciadd" "<interface> <device> <zone> Add docker bridge configuration to network and firewall uci config"
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extra_command "ucidel" "<interface> <device> <zone> Delete docker bridge configuration from network and firewall uci config"
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DOCKER_CONF_DIR="/tmp/dockerd"
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DOCKERD_CONF="${DOCKER_CONF_DIR}/daemon.json"
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uci_quiet() {
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uci -q "${@}" >/dev/null
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}
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json_add_array_string() {
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json_add_string "" "${1}"
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}
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find_network_device() {
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local device="${1}"
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local device_section=""
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check_device() {
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local cfg="${1}"
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local device="${2}"
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local type name
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config_get type "${cfg}" type
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config_get name "${cfg}" name
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[ "${type}" = "bridge" ] && [ "${name}" = "${device}" ] \
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&& device_section="${cfg}"
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}
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config_load network
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config_foreach check_device device "${device}"
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echo "${device_section}"
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}
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boot() {
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uciadd
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rc_procd start_service
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}
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uciadd() {
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local iface="${1}"
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local device="${2}"
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local zone="${3}"
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[ -z "${iface}" ] && {
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iface="docker"
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device="docker0"
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zone="docker"
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}
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/etc/init.d/dockerd running && {
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echo "Please stop dockerd service first"
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exit 0
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}
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# Add network interface
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if ! uci_quiet get network.${iface}; then
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logger -t "dockerd-init" -p notice "Adding interface '${iface}' to network config"
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uci_quiet add network interface
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uci_quiet rename network.@interface[-1]="${iface}"
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uci_quiet set network.@interface[-1].device="${device}"
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uci_quiet set network.@interface[-1].proto="none"
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uci_quiet set network.@interface[-1].auto="0"
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uci_quiet commit network
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fi
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# Add docker bridge device
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if [ "$(find_network_device "$device")" = "" ]; then
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logger -t "dockerd-init" -p notice "Adding bridge device '${device}' to network config"
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uci_quiet add network device
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uci_quiet set network.@device[-1].type="bridge"
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uci_quiet set network.@device[-1].name="${device}"
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uci_quiet commit network
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else
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logger -t "dockerd-init" -p notice "Bridge device '${device}' already defined in network config"
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fi
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# Add firewall zone
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if ! uci_quiet get firewall.${zone}; then
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logger -t "dockerd-init" -p notice "Adding firewall zone '${zone}' to firewall config"
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uci_quiet add firewall zone
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uci_quiet rename firewall.@zone[-1]="${zone}"
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uci_quiet set firewall.@zone[-1].input="ACCEPT"
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uci_quiet set firewall.@zone[-1].output="ACCEPT"
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uci_quiet set firewall.@zone[-1].forward="ACCEPT"
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uci_quiet set firewall.@zone[-1].name="${zone}"
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uci_quiet commit firewall
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fi
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# Add interface to firewall zone
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if uci_quiet get firewall.${zone}; then
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uci_quiet del_list firewall.${zone}.network="${iface}"
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uci_quiet add_list firewall.${zone}.network="${iface}"
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uci_quiet commit firewall
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fi
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reload_config
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}
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ucidel() {
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local iface="${1}"
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local device="${2}"
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local zone="${3}"
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[ -z "${iface}" ] && {
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iface="docker"
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device="docker0"
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zone="docker"
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}
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/etc/init.d/dockerd running && {
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echo "Please stop dockerd service first"
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exit 0
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}
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# Remove network device
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if uci_quiet delete network.$(find_network_device "${device}"); then
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logger -t "dockerd-init" -p notice "Deleting bridge device '${device}' from network config"
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uci_quiet commit network
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fi
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# Remove network interface
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if uci_quiet get network.${iface}; then
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logger -t "dockerd-init" -p notice "Deleting interface '${iface}' from network config"
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uci_quiet delete network.${iface}
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uci_quiet commit network
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fi
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# Remove interface from firewall zone
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if uci_quiet get firewall.${zone}; then
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logger -t "dockerd-init" -p notice "Deleting network interface '${iface}' in zone '${zone}' from firewall config"
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uci_quiet del_list firewall.${zone}.network="${iface}"
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uci_quiet commit firewall
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# Remove Firewall zone if network is empty
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if ! uci_quiet get firewall.${zone}.network; then
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logger -t "dockerd-init" -p notice "Deleting firewall zone '${zone}' from firewall config"
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uci_quiet delete firewall.${zone}
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fi
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uci_quiet commit firewall
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fi
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reload_config
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}
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process_config() {
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local alt_config_file data_root log_level iptables bip
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[ -f /etc/config/dockerd ] || {
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# Use the daemon default configuration
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DOCKERD_CONF=""
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return 0
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}
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# reset configuration
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rm -fr "${DOCKER_CONF_DIR}"
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mkdir -p "${DOCKER_CONF_DIR}"
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config_load 'dockerd'
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config_get alt_config_file globals alt_config_file
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[ -n "${alt_config_file}" ] && [ -f "${alt_config_file}" ] && {
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ln -s "${alt_config_file}" "${DOCKERD_CONF}"
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return 0
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}
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config_get data_root globals data_root "/opt/docker/"
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config_get log_level globals log_level "warn"
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config_get_bool iptables globals iptables "1"
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# Don't add these options by default
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# omission == docker defaults
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config_get bip globals bip ""
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config_get registry_mirrors globals registry_mirrors ""
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config_get hosts globals hosts ""
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config_get dns globals dns ""
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config_get_bool ipv6 globals ipv6 ""
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config_get ip globals ip ""
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config_get fixed_cidr globals fixed_cidr ""
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config_get fixed_cidr_v6 globals fixed_cidr_v6 ""
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. /usr/share/libubox/jshn.sh
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json_init
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json_add_string "data-root" "${data_root}"
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json_add_string "log-level" "${log_level}"
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json_add_boolean "iptables" "${iptables}"
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[ -z "${bip}" ] || json_add_string "bip" "${bip}"
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[ -z "${registry_mirrors}" ] || json_add_array "registry-mirrors"
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[ -z "${registry_mirrors}" ] || config_list_foreach globals registry_mirrors json_add_array_string
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[ -z "${registry_mirrors}" ] || json_close_array
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[ -z "${hosts}" ] || json_add_array "hosts"
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[ -z "${hosts}" ] || config_list_foreach globals hosts json_add_array_string
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[ -z "${hosts}" ] || json_close_array
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[ -z "${dns}" ] || json_add_array "dns"
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[ -z "${dns}" ] || config_list_foreach globals dns json_add_array_string
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[ -z "${dns}" ] || json_close_array
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[ -z "${ipv6}" ] || json_add_boolean "ipv6" "${ipv6}"
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[ -z "${ip}" ] || json_add_string "ip" "${ip}"
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[ -z "${fixed_cidr}" ] || json_add_string "fixed-cidr" "${fixed_cidr}"
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[ -z "${fixed_cidr_v6}" ] || json_add_string "fixed-cidr-v6" "${fixed_cidr_v6}"
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json_dump > "${DOCKERD_CONF}"
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[ "${iptables}" -eq "1" ] && config_foreach iptables_add_blocking_rule firewall
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}
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start_service() {
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local nofile=$(cat /proc/sys/fs/nr_open)
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process_config
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procd_open_instance
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procd_set_param stderr 1
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if [ -z "${DOCKERD_CONF}" ]; then
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procd_set_param command /usr/bin/dockerd
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else
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procd_set_param command /usr/bin/dockerd --config-file="${DOCKERD_CONF}"
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fi
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procd_set_param limits nofile="${nofile} ${nofile}"
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procd_close_instance
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}
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reload_service() {
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process_config
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procd_send_signal dockerd
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}
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service_triggers() {
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procd_add_reload_trigger 'dockerd'
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}
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iptables_add_blocking_rule() {
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local cfg="${1}"
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local device=""
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local extra_iptables_args=""
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handle_iptables_rule() {
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local interface="${1}"
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local outbound="${2}"
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local extra_iptables_args="${3}"
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local inbound=""
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. /lib/functions/network.sh
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network_get_physdev inbound "${interface}"
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[ -z "${inbound}" ] && {
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logger -t "dockerd-init" -p notice "Unable to get physical device for interface ${interface}"
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return
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}
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# Wait for a maximum of 10 second per command, retrying every millisecond
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local iptables_wait_args="--wait 10 --wait-interval 1000"
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# Ignore errors as it might already be present
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iptables ${iptables_wait_args} --table filter --new DOCKER-USER 2>/dev/null
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if ! iptables ${iptables_wait_args} --table filter --check DOCKER-USER --in-interface "${inbound}" --out-interface "${outbound}" ${extra_iptables_args} --jump REJECT 2>/dev/null; then
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logger -t "dockerd-init" -p notice "Drop traffic from ${inbound} to ${outbound}"
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iptables ${iptables_wait_args} --table filter --insert DOCKER-USER --in-interface "${inbound}" --out-interface "${outbound}" ${extra_iptables_args} --jump REJECT
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fi
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}
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config_get device "${cfg}" device
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[ -z "${device}" ] && {
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logger -t "dockerd-init" -p notice "No device configured for ${cfg}"
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return
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}
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config_get extra_iptables_args "${cfg}" extra_iptables_args
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config_list_foreach "${cfg}" blocked_interfaces handle_iptables_rule "${device}" "${extra_iptables_args}"
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}
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stop_service() {
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if /etc/init.d/dockerd running; then
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service_stop "/usr/bin/dockerd"
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fi
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}
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