430 lines
10 KiB
Bash
430 lines
10 KiB
Bash
#!/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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config_section_open() {
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local tag=$1
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local name=$2
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printf "$tag" >> $KEEPALIVED_CONF
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[ -n "$name" ] && printf " $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 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 "$optval" ] && continue
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printf "$indent$opt" >> $KEEPALIVED_CONF
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[ "$no_val" == "0" ] && {
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local words=$(echo "$optval" | wc -w)
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if [ $words -gt 1 ]; then
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printf " \"$optval\"" >> $KEEPALIVED_CONF
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else
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printf " $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 "$lst_elems" ] && return 0
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printf "$indent$lst {\n" >> $KEEPALIVED_CONF
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for e in $lst_elems; do
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[ -n "$eval_item_func" ]
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printf "$indent$INDENT_1$e\n" >> $KEEPALIVED_CONF
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done
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printf "$indent}\n" >> $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 $*; do
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printf "$INDENT_1$notify" >> $KEEPALIVED_CONF
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notify=$(echo $notify | tr 'a-z' 'A-Z')
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printf " \"/bin/busybox env -i ACTION=$notify TYPE=$type NAME=$name /sbin/hotplug-call keepalived\"\n" >> $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 notification_email_from smtp_server smtp_connect_timeout \
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router_id vrrp_mcast_group4 vrrp_mcast_group6
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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 "$device" ]; then
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printf "$indent$address" >> $KEEPALIVED_CONF
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else
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# Add IP address/netmask and device
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printf "$indent$address dev $device" >> $KEEPALIVED_CONF
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# Add scope
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[ -n "$scope" ] && printf " scope $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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[ $blackhole -gt 0 ] && {
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printf "${indent}blackhole $address\n" >> $KEEPALIVED_CONF
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return 0
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}
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# Add src addr or address
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if [ -n "$src_addr" ]; then
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printf "${indent}src $src_addr $address" >> $KEEPALIVED_CONF
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else
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[ -z "$device" ] && return 0
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printf "$indent$address" >> $KEEPALIVED_CONF
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fi
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# Add route/gateway
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[ -n "$gateway" ] && printf " via $gateway" >> $KEEPALIVED_CONF
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# Add device
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printf " dev $device" >> $KEEPALIVED_CONF
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# Add scope
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[ -n "$scope" ] && printf " scope $scope" >> $KEEPALIVED_CONF
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# Add table
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[ -n "$table" ] && printf " table $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 script 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 "$indent$value" >> $KEEPALIVED_CONF
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[ -n "$weight" ] && printf " weight $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" -a -n "$auth_pass" ] && {
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printf "${INDENT_1}authentication {\n" >> $KEEPALIVED_CONF
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printf "${INDENT_2}auth_type $auth_type\n" >> $KEEPALIVED_CONF
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printf "${INDENT_2}auth_pass $auth_pass\n" >> $KEEPALIVED_CONF
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printf "$INDENT_1}\n" >> $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 "$optval" ] && continue
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printf "$INDENT_1$opt {\n" >> $KEEPALIVED_CONF
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for a in $optval; do
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config_foreach print_ipaddress_indent ipaddress $a $INDENT_2
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done
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printf "$INDENT_1}\n" >> $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 "$optval" ] && continue
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printf "$INDENT_1$opt {\n" >> $KEEPALIVED_CONF
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for r in $optval; do
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config_foreach print_route_indent route $r $INDENT_2
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done
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printf "$INDENT_1}\n" >> $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 "$optval" ] && continue
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printf "$INDENT_1$opt {\n" >> $KEEPALIVED_CONF
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for t in $optval; do
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printf "$INDENT_2$optval\n" >> $KEEPALIVED_CONF
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done
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printf "$INDENT_1}\n" >> $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 "$optval" ] && continue
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printf "$INDENT_1$opt {\n" >> $KEEPALIVED_CONF
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for t in $optval; do
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config_foreach print_track_elem_indent track_interface $t $INDENT_2
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done
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printf "$INDENT_1}\n" >> $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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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')" >> $KEEPALIVED_CONF
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[ -f /etc/config/keepalived ] || return 0
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config_load 'keepalived'
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config_section_open "global_defs"
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config_foreach_wrapper global_defs
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config_section_close
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# If "alt_config_file" specified, use that instead
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[ -n "$alt_config_file" ] && [ -f "$alt_config_file" ] && {
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rm -f $KEEPALIVED_CONF
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# Symlink "alt_config_file" since it's a bit easier and safer
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ln -s $alt_config_file $KEEPALIVED_CONF
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return 0
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}
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config_section_open "static_ipaddress"
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config_foreach_wrapper static_ipaddress
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config_section_close
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config_section_open "static_routes"
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config_foreach_wrapper static_routes
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config_section_close
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config_foreach_wrapper vrrp_script
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config_foreach_wrapper vrrp_sync_group
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config_foreach_wrapper vrrp_instance
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return 0
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}
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service_triggers() {
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procd_add_reload_trigger "keepalived"
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}
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reload_service() {
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process_config
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#SIGHUP is used by keepalived to do init.d reload
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procd_send_signal keepalived
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}
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start_service() {
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procd_open_instance
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procd_set_param command /usr/sbin/keepalived
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procd_append_param command -n # don't daemonize, procd will handle that for us
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procd_append_param command -f "$KEEPALIVED_CONF"
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process_config
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# set auto respawn behavior
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procd_set_param respawn
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procd_close_instance
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}
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