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Update check (#1951)

Browse source 
* mail binary

* initial work

* make env vars available

* typo

* some fixes

* make script ugly, to satisfy linter..

* mailserver.env updated

* Version to welcome message added

* remove VERSION file references

* VERSION --> DMS_VERSION

* fetch remote version

* variable usage

* Quoting added

* edge test & docu

* dash removed

* subject changed

* re-add VERSION

* VERSION added

* new file:   VERSION

* rewrite

* unnecessary additions from fail2ban PR removed

* UPDATE_CHECK_INTERVAL added

* syntax check & _log function

* comment added

* final commit
This commit is contained in:
Casper 2021-05-19 21:18:06 +02:00 • committed by GitHub
parent 225e21edb7
commit bab0277723
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GPG key ID: 4AEE18F83AFDEB23
9 changed files with 109 additions and 15 deletions
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8
target/scripts/start-mailserver.sh
View file

@ -33,6 +33,7 @@ VARS[ENABLE_QUOTAS]="${ENABLE_QUOTAS:=1}"
VARS[ENABLE_SASLAUTHD]="${ENABLE_SASLAUTHD:=0}"
VARS[ENABLE_SPAMASSASSIN]="${ENABLE_SPAMASSASSIN:=0}"
VARS[ENABLE_SRS]="${ENABLE_SRS:=0}"
VARS[ENABLE_UPDATE_CHECK]="${ENABLE_UPDATE_CHECK:=1}"
VARS[FAIL2BAN_BLOCKTYPE]="${FAIL2BAN_BLOCKTYPE:=drop}"
VARS[FETCHMAIL_POLL]="${FETCHMAIL_POLL:=300}"
VARS[FETCHMAIL_PARALLEL]="${FETCHMAIL_PARALLEL:=0}"
@ -64,6 +65,7 @@ VARS[SRS_SENDER_CLASSES]="${SRS_SENDER_CLASSES:=envelope_sender}"
VARS[SSL_TYPE]="${SSL_TYPE:=}"
VARS[SUPERVISOR_LOGLEVEL]="${SUPERVISOR_LOGLEVEL:=warn}"
VARS[TLS_LEVEL]="${TLS_LEVEL:=modern}"
VARS[UPDATE_CHECK_INTERVAL]="${UPDATE_CHECK_INTERVAL:=1d}"
VARS[VIRUSMAILS_DELETE_DELAY]="${VIRUSMAILS_DELETE_DELAY:=7}"
export HOSTNAME DOMAINNAME CHKSUM_FILE
@ -168,6 +170,7 @@ function register_functions
_register_start_daemon '_start_daemons_rsyslog'
[[ ${SMTP_ONLY} -ne 1 ]] && _register_start_daemon '_start_daemons_dovecot'
[[ ${ENABLE_UPDATE_CHECK} -eq 1 ]] && _register_start_daemon '_start_daemons_update_check'
# needs to be started before SASLauthd
_register_start_daemon '_start_daemons_opendkim'
@ -249,16 +252,13 @@ function _defunc
# shellcheck source=./startup/daemons-stack.sh
. /usr/local/bin/daemons-stack.sh
# source DMS_VERSION variable
. /root/.bashrc
# ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
# ? << Sourcing all stacks
# ––
# ? >> Executing all stacks
# ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
_notify 'tasklog' "Welcome to docker-mailserver ${DMS_VERSION}"
_notify 'tasklog' "Welcome to docker-mailserver $(</VERSION)"
_notify 'inf' 'ENVIRONMENT'
[[ ${DMS_DEBUG} -eq 1 ]] && printenv

6
target/scripts/startup/daemons-stack.sh
View file

@ -152,3 +152,9 @@ function _start_changedetector
_notify 'task' 'Starting changedetector'
supervisorctl start changedetector
}
function _start_daemons_update_check
{
_notify 'task' 'Starting update-check'
supervisorctl start update-check
}

60
target/scripts/update-check.sh Executable file
View file

@ -0,0 +1,60 @@
#! /bin/bash
VERSION=$(</VERSION)
VERSION_URL="https://raw.githubusercontent.com/docker-mailserver/docker-mailserver/master/VERSION"
CHANGELOG="https://github.com/docker-mailserver/docker-mailserver/blob/master/CHANGELOG.md"
function _log
{
DATE=$(date '+%F %T')
echo "${DATE} ${1}"
}
# check for correct syntax
# number + suffix. suffix must be 's' for seconds, 'm' for minutes, 'h' for hours or 'd' for days.
if [[ ! ${UPDATE_CHECK_INTERVAL} =~ ^[0-9]+[smhd]{1}$ ]]
then
_log "Error: Invalid UPDATE_CHECK_INTERVAL value: ${UPDATE_CHECK_INTERVAL}"
_log "Info: Fallback to daily update checks"
UPDATE_CHECK_INTERVAL="1d"
fi
while true
do
# get remote version information
LATEST=$(curl -Lsf "${VERSION_URL}")
# did we get a valid response?
if [[ ${LATEST} =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]
then
_log "Info: Remote version information fetched"
# compare versions
if dpkg --compare-versions "${VERSION}" lt "${LATEST}"
then
# send mail notification to postmaster
read -r -d '' MAIL << EOM
Hello ${POSTMASTER_ADDRESS}!
There is a docker-mailserver update available on your host: $(hostname -f)
Current version: ${VERSION}
Latest version: ${LATEST}
Changelog: ${CHANGELOG}
EOM
echo "${MAIL}" | mail -s "Mailserver update available! [ ${VERSION} --> ${LATEST} ]" "${POSTMASTER_ADDRESS}" && \
_log "Info: Update available [ ${VERSION} --> ${LATEST} ]" && \
# only notify once
exit 0
else
_log "Info: No update available"
fi
else
_log "Error: Update check failed."
fi
# check again in one day
sleep "${UPDATE_CHECK_INTERVAL}"
done