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547 lines
14 KiB
547 lines
14 KiB
#!/bin/sh /etc/rc.common
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# Copyright (C) 2007-2015 OpenWrt.org
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START=70
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STOP=01
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USE_PROCD=1
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KEEPALIVED_CONF=/tmp/keepalived.conf
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INDENT_1="\t"
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INDENT_2="${INDENT_1}${INDENT_1}"
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INDENT_3="${INDENT_1}${INDENT_1}${INDENT_1}"
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INDENT_4="${INDENT_1}${INDENT_1}${INDENT_1}${INDENT_1}"
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config_section_open() {
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local tag="$1"
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local name="$2"
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printf '%s' "$tag" >> "$KEEPALIVED_CONF"
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[ -n "$name" ] && printf ' %s' "$name" >> "$KEEPALIVED_CONF"
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printf ' {\n' >> "$KEEPALIVED_CONF"
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}
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config_section_close() {
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printf '}\n\n' >> "$KEEPALIVED_CONF"
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}
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config_foreach_wrapper() {
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local section="$1"
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local function="$1"
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# Convention is that 'function' and 'section' are the same
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config_foreach "$function" "$section"
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}
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print_elems_indent() {
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local config="$1"
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shift
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local indent="$1"
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shift
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[ -z "$indent" ] && indent="$INDENT_1"
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for opt in "$@"; do
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local "$opt"
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local optval
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local no_val=0
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if [ "${opt:0:7}" = "no_val_" ]; then
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opt="${opt:7}"
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no_val=1
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fi
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config_get "$opt" "$config" "$opt"
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eval optval=\$"$opt"
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[ -z "$optval" ] && continue
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printf '%b%s' "$indent" "$opt" >> "$KEEPALIVED_CONF"
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[ "$no_val" = "0" ] && {
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local words=0
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words="$(echo "$optval" | wc -w)"
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if [ "$words" -gt 1 ]; then
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printf ' "%s"' "$optval" >> "$KEEPALIVED_CONF"
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else
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printf ' %s' "$optval" >> "$KEEPALIVED_CONF"
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fi
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}
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printf '\n' >> "$KEEPALIVED_CONF"
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done
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unset optval
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}
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print_list_indent() {
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local lst="$1"
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local indent="$2"
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local lst_elems
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[ -z "$indent" ] && indent="$INDENT_1"
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eval lst_elems=\$"$lst"
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[ -z "$lst_elems" ] && return 0
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printf '%b%s {\n' "$indent" "$lst" >> "$KEEPALIVED_CONF"
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for e in $lst_elems; do
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printf '%b%s\n' "${indent}${INDENT_1}" "$e">> "$KEEPALIVED_CONF"
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done
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printf '%b}\n' "$indent" >> "$KEEPALIVED_CONF"
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}
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print_notify() {
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local type="$1"
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shift
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local name="$1"
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shift
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for notify in "$@"; do
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printf '%b%s' "${INDENT_1}" "$notify">> "$KEEPALIVED_CONF"
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notify="$(echo "$notify" | tr 'a-z' 'A-Z')"
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printf ' "/bin/busybox env -i ACTION=%s TYPE=%s NAME=%s /sbin/hotplug-call keepalived"\n' "$notify" "$type" "$name" >> "$KEEPALIVED_CONF"
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done
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}
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global_defs() {
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local linkbeat_use_polling notification_email
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config_get alt_config_file "$1" alt_config_file
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[ -z "$alt_config_file" ] || return 0
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config_get_bool linkbeat_use_polling "$1" linkbeat_use_polling 0
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[ "$linkbeat_use_polling" -gt 0 ] && printf 'linkbeat_use_polling\n\n' >> "$KEEPALIVED_CONF"
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config_get notification_email "$1" notification_email
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print_list_indent notification_email
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print_elems_indent "$1" "$INDENT_1" \
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notification_email_from \
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smtp_server \
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smtp_connect_timeout \
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router_id \
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vrrp_mcast_group4 \
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vrrp_mcast_group6 \
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vrrp_startup_delay
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}
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print_ipaddress_indent() {
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local section="$1"
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local curr_ipaddr="$2"
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local indent="$3"
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local address device scope name
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config_get name "$section" name
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[ "$name" != "$curr_ipaddr" ] && return 0
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config_get address "$section" address
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config_get device "$section" device
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config_get scope "$section" scope
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# Default indent
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[ -z "$indent" ] && indent="$INDENT_1"
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# If no address exit
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[ -z "$address" ] && return 0
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if [ -z "$device" ]; then
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printf '%b%s' "$indent" "$address" >> "$KEEPALIVED_CONF"
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else
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# Add IP address/netmask and device
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printf '%b%s dev %s' "$indent" "$address" "$device">> "$KEEPALIVED_CONF"
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# Add scope
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[ -n "$scope" ] && printf ' scope %s' "$scope" >> "$KEEPALIVED_CONF"
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fi
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printf '\n' >> "$KEEPALIVED_CONF"
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}
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static_ipaddress() {
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local address
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config_get address "$1" address
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for a in $address; do
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config_foreach print_ipaddress_indent ipaddress "$a"
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done
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}
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print_route_indent() {
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local section="$1"
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local curr_route="$2"
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local indent="$3"
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local name blackhole address src_addr gateway device scope table
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config_get name "$section" name
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[ "$name" != "$curr_route" ] && return 0
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config_get_bool blackhole "$section" blackhole 0
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config_get address "$section" address
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config_get src_addr "$section" src_addr
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config_get gateway "$section" gateway
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config_get device "$section" device
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config_get table "$section" table
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# If no address exit
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[ -z "$address" ] && return 0
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# Default indent
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[ -z "$indent" ] && indent="$INDENT_1"
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[ "$blackhole" -gt 0 ] && {
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printf '%bblackhole %s\n' "$indent" "$address" >> "$KEEPALIVED_CONF"
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return 0
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}
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# Add src addr or address
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if [ -n "$src_addr" ]; then
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printf '%bsrc %s %s' "$indent" "$src_addr" "$address" >> "$KEEPALIVED_CONF"
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else
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[ -z "$device" ] && return 0
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printf '%b%s' "$indent" "$address" >> "$KEEPALIVED_CONF"
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fi
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# Add route/gateway
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[ -n "$gateway" ] && printf ' via %s' "$gateway" >> "$KEEPALIVED_CONF"
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# Add device
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printf ' dev %s' "$device" >> "$KEEPALIVED_CONF"
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# Add scope
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[ -n "$scope" ] && printf ' scope %s' "$scope" >> "$KEEPALIVED_CONF"
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# Add table
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[ -n "$table" ] && printf ' table %s' "$table" >> "$KEEPALIVED_CONF"
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printf '\n' >> "$KEEPALIVED_CONF"
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}
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print_track_elem_indent() {
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local section="$1"
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local curr_track_elem="$2"
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local indent="$3"
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local name value
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config_get name "$section" name
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[ "$name" != "$curr_track_elem" ] && return 0
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config_get value "$section" value
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config_get weight "$section" weight
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[ -z "$value" ] && return 0
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printf '%b%s' "$indent" "$value" >> "$KEEPALIVED_CONF"
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[ -n "$weight" ] && printf ' weight %s' "$weight" >> "$KEEPALIVED_CONF"
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printf '\n' >> "$KEEPALIVED_CONF"
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}
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static_routes() {
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local route
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config_get route "$1" route
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for r in $route; do
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config_foreach print_route_indent route "$r"
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done
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}
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# Count 'vrrp_instance' with the given name ; called by vrrp_instance_check()
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vrrp_instance_name_count() {
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local name
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config_get name "$1" name
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[ "$name" = "$2" ] && count="$((count + 1))"
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}
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# Check if there's a 'vrrp_instance' section with the given name
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vrrp_instance_check() {
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local count="0"
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local name="$1"
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config_foreach vrrp_instance_name_count vrrp_instance "$name"
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[ $count -gt 0 ] && return 0 || return 1
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}
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vrrp_sync_group() {
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local group name
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local valid_group
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# No name for group, exit
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config_get name "$1" name
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[ -z "$name" ] && return 0
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# No members for group, exit
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config_get group "$1" group
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[ -z "$group" ] && return 0
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# Check if we have 'vrrp_instance's defined for
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# each member and remove names with not vrrp_instance defined
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for m in $group; do
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vrrp_instance_check "$m" && valid_group="$valid_group $m"
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done
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[ -z "$valid_group" ] && return 0
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config_section_open "vrrp_sync_group" "$name"
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group="$valid_group"
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print_list_indent group
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print_elems_indent "$1" "$INDENT_1" no_val_smtp_alert no_val_global_tracking
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print_notify "GROUP" "$name" notify_backup notify_master \
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notify_fault notify
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config_section_close
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}
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vrrp_instance() {
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local name auth_type auth_pass
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config_get name "$1" name
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[ -z "$name" ] && return 0
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config_section_open "vrrp_instance" "$name"
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config_get auth_type "$1" auth_type
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config_get auth_pass "$1" auth_pass
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[ -n "$auth_type" ] && [ -n "$auth_pass" ] && {
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printf '%bauthentication {\n' "${INDENT_1}" >> "$KEEPALIVED_CONF"
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printf '%bauth_type %s\n' "${INDENT_2}" "$auth_type" >> "$KEEPALIVED_CONF"
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printf '%bauth_pass %s\n' "${INDENT_2}" "$auth_pass" >> "$KEEPALIVED_CONF"
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printf '%b}\n' "${INDENT_1}" >> "$KEEPALIVED_CONF"
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}
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print_elems_indent "$1" "$INDENT_1" state interface \
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mcast_src_ip unicast_src_ip virtual_router_id version priority \
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advert_int preempt_delay debug \
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lvs_sync_daemon_interface garp_master_delay garp_master_refresh \
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garp_master_repeat garp_master_refresh_repeat \
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no_val_vmac_xmit_base no_val_native_ipv6 no_val_accept \
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no_val_dont_track_primary no_val_smtp_alert no_val_nopreempt \
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no_val_use_vmac
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print_notify "INSTANCE" "$name" notify_backup notify_master \
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notify_fault notify_stop
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# Handle virtual_ipaddress & virtual_ipaddress_excluded lists
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for opt in virtual_ipaddress virtual_ipaddress_excluded; do
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config_get "$opt" "$1" "$opt"
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eval optval=\$$opt
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[ -z "$optval" ] && continue
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printf '%b%s {\n' "${INDENT_1}" "$opt" >> "$KEEPALIVED_CONF"
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for a in $optval; do
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config_foreach print_ipaddress_indent ipaddress "$a" "$INDENT_2"
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done
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printf '%b}\n' "${INDENT_1}" >> "$KEEPALIVED_CONF"
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done
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# Handle virtual_routes
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for opt in virtual_routes; do
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config_get "$opt" "$1" "$opt"
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eval optval=\$$opt
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[ -z "$optval" ] && continue
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printf '%b%s {\n' "${INDENT_1}" "$opt" >> "$KEEPALIVED_CONF"
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for r in $optval; do
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config_foreach print_route_indent route "$r" "$INDENT_2"
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done
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printf '%b}\n' "${INDENT_1}" >> "$KEEPALIVED_CONF"
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done
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# Handle track_script lists
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for opt in track_script; do
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config_get "$opt" "$1" "$opt"
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eval optval=\$$opt
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[ -z "$optval" ] && continue
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printf '%b%s {\n' "${INDENT_1}" "$opt" >> "$KEEPALIVED_CONF"
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for t in $optval; do
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printf '%b%s\n' "${INDENT_2}" "$optval" >> "$KEEPALIVED_CONF"
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done
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printf '%b}\n' "${INDENT_1}" >> "$KEEPALIVED_CONF"
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done
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# Handle track_interface lists
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for opt in track_interface; do
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config_get "$opt" "$1" "$opt"
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eval optval=\$$opt
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[ -z "$optval" ] && continue
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printf '%b%s {\n' "${INDENT_1}" "$opt" >> "$KEEPALIVED_CONF"
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for t in $optval; do
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config_foreach print_track_elem_indent track_interface "$t" "$INDENT_2"
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done
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printf '%b}\n' "${INDENT_1}" >> "$KEEPALIVED_CONF"
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done
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# Handle simple lists of strings (with no spaces in between)
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for opt in unicast_peer; do
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config_get "$opt" "$1" "$opt"
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print_list_indent "$opt"
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done
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unset optval
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config_section_close
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}
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vrrp_script() {
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local name
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config_get name "$1" name
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[ -z "$name" ] && return 0
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config_section_open "vrrp_script" "$name"
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print_elems_indent "$1" "$INDENT_1" script interval weight fall rise
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config_section_close
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}
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url() {
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local url="$2"
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local name path digest
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config_get name "$1" name
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[ "$url" = "$name" ] || return 0
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config_get path "$1" path
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config_get digest "$1" digest
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[ -n "$digest" ] && [ -n "$path" ] && {
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printf '%burl {\n' "${INDENT_3}" >> "$KEEPALIVED_CONF"
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printf '%bpath %s\n' "${INDENT_4}" "$path" >> "$KEEPALIVED_CONF"
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printf '%bdigest %s\n' "${INDENT_4}" "$digest" >> "$KEEPALIVED_CONF"
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printf '%b}\n' "${INDENT_3}" >> "$KEEPALIVED_CONF"
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}
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}
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url_list() {
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config_foreach url url "$1"
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}
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real_server() {
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local server="$2"
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local enabled name weight ipaddr port check
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config_get_bool enabled "$1" enabled 1
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[ "$enabled" -eq 1 ] || return 0
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config_get name "$1" name
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[ "$server" = "$name" ] || return 0
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config_get weight "$1" weight
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[ -n "$weight" ] || return 0
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config_get ipaddr "$1" ipaddr
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config_get port "$1" port
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config_get check "$1" check
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[ -n "$ipaddr" ] && [ -n "$port" ] && {
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printf '%breal_server %s %d {\n' "${INDENT_1}" "$ipaddr" "$port" >> "$KEEPALIVED_CONF"
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printf '%bweight %d\n' "${INDENT_2}" "$weight" >> "$KEEPALIVED_CONF"
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case "$check" in
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TCP_CHECK)
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printf '%b%s {\n' "${INDENT_2}" "$check" >> "$KEEPALIVED_CONF"
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print_elems_indent "$1" "$INDENT_3" connect_timeout \
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connect_port
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printf '%b}\n' "${INDENT_2}" >> "$KEEPALIVED_CONF"
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;;
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MISC_CHECK)
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printf '%b%s {\n' "${INDENT_2}" "$check" >> "$KEEPALIVED_CONF"
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print_elems_indent "$1" "$INDENT_3" misc_path
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printf '%b}\n' "${INDENT_2}" >> "$KEEPALIVED_CONF"
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;;
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HTTP_GET | SSL_GET)
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printf '%b%s {\n' "${INDENT_2}" "$check" >> "$KEEPALIVED_CONF"
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print_elems_indent "$1" "$INDENT_3" connect_timeout \
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connect_port nb_get_retry delay_before_retry
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# Handle url list
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config_list_foreach "$1" url url_list
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printf '%b}\n' "${INDENT_2}" >> "$KEEPALIVED_CONF"
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;;
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esac
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printf '%b}\n' "${INDENT_1}" >> "$KEEPALIVED_CONF"
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}
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}
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real_server_list() {
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config_foreach real_server real_server "$1"
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}
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virtual_server() {
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local enabled ipaddr port lb_algo sorry_server_ip sorry_server_port
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config_get_bool enabled "$1" enabled 1
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[ "$enabled" -eq 1 ] || return 0
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config_get ipaddr "$1" ipaddr
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[ -z "$ipaddr" ] && return 0
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config_get port "$1" port
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[ -z "$port" ] && return 0
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config_section_open "virtual_server" "$ipaddr $port"
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print_elems_indent "$1" "$INDENT_1" fwmark delay_loop \
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lb_kind persistence_timeout persistence_granularity \
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virtualhost protocol
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config_get lb_algo "$1" lb_algo
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[ -z "$lb_algo" ] && lb_algo="rr"
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modprobe ip_vs_${lb_algo} 1>/dev/null 2>&1
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printf '%blb_algo %s\n' "${INDENT_1}" "${lb_algo}" >> "$KEEPALIVED_CONF"
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config_get sorry_server_ip "$1" sorry_server_ip
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config_get sorry_server_port "$1" sorry_server_port
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[ -n "$sorry_server_ip" ] && [ -n "$sorry_server_port" ] && {
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printf '%bsorry_server %s %s\n' "${INDENT_1}" "$sorry_server_ip" "$sorry_server_port" >> "$KEEPALIVED_CONF"
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}
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# Handle real_server list
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config_list_foreach "$1" real_server real_server_list
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config_section_close
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}
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process_config() {
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local alt_config_file
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rm -f "$KEEPALIVED_CONF"
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# First line
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printf '! Configuration file for keepalived (autogenerated via init script)\n' > "$KEEPALIVED_CONF"
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printf '! Written %s\n\n' "$(date +'%c')" >> "$KEEPALIVED_CONF"
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[ -f /etc/config/keepalived ] || return 0
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config_load 'keepalived'
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config_section_open "global_defs"
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config_foreach_wrapper global_defs
|
|
config_section_close
|
|
|
|
# If "alt_config_file" specified, use that instead
|
|
[ -n "$alt_config_file" ] && [ -f "$alt_config_file" ] && {
|
|
rm -f "$KEEPALIVED_CONF"
|
|
# Symlink "alt_config_file" since it's a bit easier and safer
|
|
ln -s "$alt_config_file" "$KEEPALIVED_CONF"
|
|
return 0
|
|
}
|
|
|
|
config_section_open "static_ipaddress"
|
|
config_foreach_wrapper static_ipaddress
|
|
config_section_close
|
|
|
|
config_section_open "static_routes"
|
|
config_foreach_wrapper static_routes
|
|
config_section_close
|
|
|
|
config_foreach_wrapper vrrp_script
|
|
config_foreach_wrapper vrrp_sync_group
|
|
config_foreach_wrapper vrrp_instance
|
|
config_foreach_wrapper virtual_server
|
|
return 0
|
|
}
|
|
|
|
service_triggers() {
|
|
procd_add_reload_trigger "keepalived"
|
|
}
|
|
|
|
reload_service() {
|
|
process_config
|
|
#SIGHUP is used by keepalived to do init.d reload
|
|
procd_send_signal keepalived
|
|
}
|
|
|
|
start_service() {
|
|
procd_open_instance
|
|
procd_set_param command /usr/sbin/keepalived
|
|
procd_append_param command -n # don't daemonize, procd will handle that for us
|
|
procd_append_param command -f "$KEEPALIVED_CONF"
|
|
|
|
process_config
|
|
|
|
# set auto respawn behavior
|
|
procd_set_param respawn
|
|
procd_close_instance
|
|
}
|
|
|