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#!/bin/sh /etc/rc.common
# Copyright (C) 2007-2015 OpenWrt.org
START=70
STOP=01
USE_PROCD=1
KEEPALIVED_CONF=/tmp/keepalived.conf
INDENT_1=\\t
INDENT_2=$INDENT_1$INDENT_1
config_section_open() {
local tag=$1
local name=$2
printf "$tag" >> $KEEPALIVED_CONF
[ -n "$name" ] && printf " $name" >> $KEEPALIVED_CONF
printf " {\n" >> $KEEPALIVED_CONF
}
config_section_close() {
printf "}\n\n" >> $KEEPALIVED_CONF
}
config_foreach_wrapper() {
local section=$1
local function=$1
# Convention is that 'function' and 'section' are the same
config_foreach $function $section
}
print_elems_indent() {
local config=$1
shift
local indent=$1
shift
[ -z "$indent" ] && indent="$INDENT_1"
for opt in $*; do
local $opt
local no_val=0
if [ ${opt:0:7} == "no_val_" ]; then
opt=${opt:7}
no_val=1
fi
config_get $opt $config $opt
eval optval=\$$opt
[ -z "$optval" ] && continue
printf "$indent$opt" >> $KEEPALIVED_CONF
[ "$no_val" == "0" ] && {
local words=$(echo "$optval" | wc -w)
if [ $words -gt 1 ]; then
printf " \"$optval\"" >> $KEEPALIVED_CONF
else
printf " $optval" >> $KEEPALIVED_CONF
fi
}
printf "\n" >> $KEEPALIVED_CONF
done
unset optval
}
print_list_indent() {
local lst=$1
local indent=$2
local lst_elems
[ -z "$indent" ] && indent=$INDENT_1
eval lst_elems=\$$lst
[ -z "$lst_elems" ] && return 0
printf "$indent$lst {\n" >> $KEEPALIVED_CONF
for e in $lst_elems; do
[ -n "$eval_item_func" ]
printf "$indent$INDENT_1$e\n" >> $KEEPALIVED_CONF
done
printf "$indent}\n" >> $KEEPALIVED_CONF
}
print_notify() {
local type=$1
shift
local name=$1
shift
for notify in $*; do
printf "$INDENT_1$notify" >> $KEEPALIVED_CONF
notify=$(echo $notify | tr 'a-z' 'A-Z')
printf " \"/bin/busybox env -i ACTION=$notify TYPE=$type NAME=$name /sbin/hotplug-call keepalived\"\n" >> $KEEPALIVED_CONF
done
}
global_defs() {
local linkbeat_use_polling notification_email
config_get alt_config_file $1 alt_config_file
[ -z "$alt_config_file" ] || return 0
config_get_bool linkbeat_use_polling $1 linkbeat_use_polling 0
[ $linkbeat_use_polling -gt 0 ] && printf "linkbeat_use_polling\n\n" >> $KEEPALIVED_CONF
config_get notification_email $1 notification_email
print_list_indent notification_email
print_elems_indent $1 $INDENT_1 notification_email_from smtp_server smtp_connect_timeout \
router_id vrrp_mcast_group4 vrrp_mcast_group6
}
print_ipaddress_indent() {
local section=$1
local curr_ipaddr=$2
local indent=$3
local address device scope name
config_get name $section name
[ "$name" != "$curr_ipaddr" ] && return 0
config_get address $section address
config_get device $section device
config_get scope $section scope
# Default indent
[ -z "$indent" ] && indent=$INDENT_1
# If no address or device exit
[ -z "$address" -o -z "$device" ] && return 0
# Add IP address/netmask and device
printf "$indent$address dev $device" >> $KEEPALIVED_CONF
# Add scope
[ -n "$scope" ] && printf " scope $scope" >> $KEEPALIVED_CONF
printf "\n" >> $KEEPALIVED_CONF
}
static_ipaddress() {
local address
config_get address "$1" address
for a in $address; do
config_foreach print_ipaddress_indent ipaddress $a
done
}
print_route_indent() {
local section=$1
local curr_route=$2
local indent=$3
local name blackhole address src_addr gateway device scope table
config_get name $section name
[ "$name" != "$curr_route" ] && return 0
config_get_bool blackhole $section blackhole 0
config_get address $section address
config_get src_addr $section src_addr
config_get gateway $section gateway
config_get device $section device
config_get table $section table
# If no address exit
[ -z "$address" ] && return 0
# Default indent
[ -z "$indent" ] && indent=$INDENT_1
[ $blackhole -gt 0 ] && {
printf "${indent}blackhole $address\n" >> $KEEPALIVED_CONF
return 0
}
# Add src addr or address
if [ -n "$src_addr" ]; then
printf "${indent}src $src_addr $address" >> $KEEPALIVED_CONF
else
[ -z "$device" ] && return 0
printf "$indent$address" >> $KEEPALIVED_CONF
fi
# Add route/gateway
[ -n "$gateway" ] && printf " via $gateway" >> $KEEPALIVED_CONF
# Add device
printf " dev $device" >> $KEEPALIVED_CONF
# Add scope
[ -n "$scope" ] && printf " scope $scope" >> $KEEPALIVED_CONF
# Add table
[ -n "$table" ] && printf " table $table" >> $KEEPALIVED_CONF
printf "\n" >> $KEEPALIVED_CONF
}
print_track_elem_indent() {
local section=$1
local curr_track_elem=$2
local indent=$3
local script name value
config_get name $section name
[ "$name" != "$curr_track_elem" ] && return 0
config_get value $section value
config_get weight $section weight
[ -z "$value" ] && return 0
printf "$indent$value" >> $KEEPALIVED_CONF
[ -n "$weight" ] && printf " weight $weight" >> $KEEPALIVED_CONF
printf "\n" >> $KEEPALIVED_CONF
}
static_routes() {
local route
config_get route "$1" route
for r in $route; do
config_foreach print_route_indent route $r
done
}
# Count 'vrrp_instance' with the given name ; called by vrrp_instance_check()
vrrp_instance_name_count() {
local name
config_get name $1 name
[ "$name" == "$2" ] && count=$((count + 1))
}
# Check if there's a 'vrrp_instance' section with the given name
vrrp_instance_check() {
local count=0
local name=$1
config_foreach vrrp_instance_name_count vrrp_instance $name
[ $count -gt 0 ] && return 0 || return 1
}
vrrp_sync_group() {
local group name
local valid_group
# No name for group, exit
config_get name $1 name
[ -z "$name" ] && return 0
# No members for group, exit
config_get group $1 group
[ -z "$group" ] && return 0
# Check if we have 'vrrp_instance's defined for
# each member and remove names with not vrrp_instance defined
for m in $group; do
vrrp_instance_check $m && valid_group="$valid_group $m"
done
[ -z "$valid_group" ] && return 0
config_section_open "vrrp_sync_group" "$name"
group="$valid_group"
print_list_indent group
print_elems_indent $1 $INDENT_1 no_val_smtp_alert no_val_global_tracking
print_notify "GROUP" "$name" notify_backup notify_master \
notify_fault notify
config_section_close
}
vrrp_instance() {
local name auth_type auth_pass
config_get name $1 name
[ -z "$name" ] && return 0
config_section_open "vrrp_instance" "$name"
config_get auth_type $1 auth_type
config_get auth_pass $1 auth_pass
[ -n "$auth_type" -a -n "$auth_pass" ] && {
printf "${INDENT_1}authentication {\n" >> $KEEPALIVED_CONF
printf "${INDENT_2}auth_type $auth_type\n" >> $KEEPALIVED_CONF
printf "${INDENT_2}auth_pass $auth_pass\n" >> $KEEPALIVED_CONF
printf "$INDENT_1}\n" >> $KEEPALIVED_CONF
}
print_elems_indent $1 $INDENT_1 use_vmac state interface \
mcast_src_ip unicast_src_ip virtual_router_id version priority \
advert_int preempt_delay debug \
lvs_sync_daemon_interface garp_master_delay garp_master_refresh \
garp_master_repeat garp_master_refresh_repeat \
no_val_vmac_xmit_base no_val_native_ipv6 no_val_accept \
no_val_dont_track_primary no_val_smtp_alert no_val_nopreempt
print_notify "INSTANCE" "$name" notify_backup notify_master \
notify_fault notify_stop notify
# Handle virtual_ipaddress & virtual_ipaddress_excluded lists
for opt in virtual_ipaddress virtual_ipaddress_excluded; do
config_get $opt $1 $opt
eval optval=\$$opt
[ -z "$optval" ] && continue
printf "$INDENT_1$opt {\n" >> $KEEPALIVED_CONF
for a in $optval; do
config_foreach print_ipaddress_indent ipaddress $a $INDENT_2
done
printf "$INDENT_1}\n" >> $KEEPALIVED_CONF
done
# Handle virtual_routes
for opt in virtual_routes; do
config_get $opt $1 $opt
eval optval=\$$opt
[ -z "$optval" ] && continue
printf "$INDENT_1$opt {\n" >> $KEEPALIVED_CONF
for r in $optval; do
config_foreach print_route_indent route $r $INDENT_2
done
printf "$INDENT_1}\n" >> $KEEPALIVED_CONF
done
# Handle track_script lists
for opt in track_script; do
config_get $opt $1 $opt
eval optval=\$$opt
[ -z "$optval" ] && continue
printf "$INDENT_1$opt {\n" >> $KEEPALIVED_CONF
for t in $optval; do
printf "$INDENT_2$optval\n" >> $KEEPALIVED_CONF
done
printf "$INDENT_1}\n" >> $KEEPALIVED_CONF
done
# Handle track_interface lists
for opt in track_interface; do
config_get $opt $1 $opt
eval optval=\$$opt
[ -z "$optval" ] && continue
printf "$INDENT_1$opt {\n" >> $KEEPALIVED_CONF
for t in $optval; do
config_foreach print_track_elem_indent track_interface $t $INDENT_2
done
printf "$INDENT_1}\n" >> $KEEPALIVED_CONF
done
# Handle simple lists of strings (with no spaces in between)
for opt in unicast_peer; do
config_get $opt $1 $opt
print_list_indent $opt
done
unset optval
config_section_close
}
vrrp_script() {
local name
config_get name $1 name
[ -z "$name" ] && return 0
config_section_open "vrrp_script" "$name"
print_elems_indent $1 $INDENT_1 script interval weight fall rise
config_section_close
}
process_config() {
local alt_config_file
rm -f $KEEPALIVED_CONF
# First line
printf "! Configuration File for keepalived (autogenerated via init script)\n\n" > $KEEPALIVED_CONF
[ -f /etc/config/keepalived ] || return 0
config_load 'keepalived'
config_section_open "global_defs"
config_foreach_wrapper global_defs
config_section_close
# If "alt_config_file" specified, use that instead
[ -n "$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 $KEEPALIVED_CONF
return 0
}
config_section_open "static_ipaddress"
config_foreach_wrapper static_ipaddress
config_section_close
config_section_open "static_routes"
config_foreach_wrapper static_routes
config_section_close
config_foreach_wrapper vrrp_script
config_foreach_wrapper vrrp_sync_group
config_foreach_wrapper vrrp_instance
return 0
}
service_running() {
pgrep -x /usr/sbin/keepalived &> /dev/null
}
conf_md5() {
echo "$(md5sum $KEEPALIVED_CONF | awk '{print $1}')"
}
reload_service() {
local cur_md5="$(conf_md5)"
running && {
process_config
# Return without performing the reload if config
# file md5sum has not changed
local new_md5="$(conf_md5)"
[ "$new_md5" == "$cur_md5" ] && return 0;
# SIGHUP is used by keepalived to do init.d reload
# Get the oldest process (assumption is that it's the parent process)
PID=$(pgrep -o /usr/sbin/keepalived)
kill -SIGHUP $PID
return 0
}
return 1
}
start_service() {
procd_open_instance
procd_set_param command /usr/sbin/keepalived
procd_append_param command -n # don't daemonize, procd will handle that for us
procd_append_param command -f "$KEEPALIVED_CONF"
process_config
# set auto respawn behavior
procd_set_param respawn
procd_close_instance
}