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Watchdog to disable keyserver if the database becomes too large

This commit is contained in:
Bob Mottram 2017-07-30 16:38:49 +01:00
parent 4cdef1e0b4
commit 43a44a1186
1 changed files with 34 additions and 0 deletions
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34
src/freedombone-app-keyserver
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@ -56,6 +56,33 @@ function check_keyserver_directory_size {
echo "0"
}
function keyserver_watchdog {
ADMIN_USERNAME=$(cat $COMPLETION_FILE | grep "Admin user" | awk -F ':' '{print $2}')
ADMIN_EMAIL_ADDRESS=${ADMIN_USERNAME}@${HOSTNAME}
keyserver_size_warning=$"The SKS keyserver database is getting large. Check that you aren't being spammed"
keyserver_disabled_warning=$"The SKS keyserver has been disabled because it is getting too large. This is to prevent flooding attacks from crashing the server."
keyserver_mail_subject_line=$"${PROJECT_NAME} keyserver warning"
keyserver_mail_subject_line_disabled=$"${PROJECT_NAME} keyserver disabled"
read_config_param KEYSERVER_DOMAIN_NAME
keyserver_watchdog_script=/etc/cron.hourly/keyserver-watchdog
echo '#!/bin/bash' > $keyserver_watchdog_script
echo "dirsize=\$(du /var/lib/sks/DB | awk -F ' ' '{print \$1}')" >> $keyserver_watchdog_script
echo 'if [ $dirsize -gt 450000 ]; then' >> $keyserver_watchdog_script
echo " echo \"$keyserver_size_warning\" | mail -s \"$keyserver_mail_subject_line\" $ADMIN_EMAIL_ADDRESS" >> $keyserver_watchdog_script
echo ' if [ $dirsize -gt 500000 ]; then' >> $keyserver_watchdog_script
echo " nginx_dissite $KEYSERVER_DOMAIN_NAME" >> $keyserver_watchdog_script
echo ' systemctl stop sks' >> $keyserver_watchdog_script
echo ' systemctl disable sks' >> $keyserver_watchdog_script
echo " echo \"$keyserver_disabled_warning\" | mail -s \"$keyserver_mail_subject_line_disabled\" $ADMIN_EMAIL_ADDRESS" >> $keyserver_watchdog_script
echo ' fi' >> $keyserver_watchdog_script
echo 'fi' >> $keyserver_watchdog_script
chmod +x $keyserver_watchdog_script
}
function configure_firewall_for_keyserver {
if [[ $ONION_ONLY != "no" ]]; then
return
@ -88,6 +115,8 @@ function reconfigure_keyserver {
}
function upgrade_keyserver {
keyserver_watchdog
CURR_KEYSERVER_WEB_COMMIT=$(get_completion_param "keyserver web commit")
if [[ "$CURR_KEYSERVER_WEB_COMMIT" == "$KEYSERVER_WEB_COMMIT" ]]; then
return
@ -260,6 +289,9 @@ function restore_remote_keyserver {
function remove_keyserver {
systemctl stop sks
if [ -f /etc/cron.hourly/keyserver-watchdog ]; then
rm /etc/cron.hourly/keyserver-watchdog
fi
apt-get -qy remove sks dirmngr
read_config_param "KEYSERVER_DOMAIN_NAME"
@ -770,6 +802,8 @@ function install_keyserver {
set_completion_param "keyserver onion domain" "$KEYSERVER_ONION_HOSTNAME"
set_completion_param "sks onion domain" "$SKS_ONION_HOSTNAME"
keyserver_watchdog
APP_INSTALLED=1
}