kubernetes fix (#484)

* Allow OVERRIDE_HOSTNAME
* Document the new environment variable

Makefile

@@ -47,8 +47,9 @@ run:
 		-v "`pwd`/test/config":/tmp/docker-mailserver \
 		-v "`pwd`/test":/tmp/docker-mailserver-test \
 		-e SMTP_ONLY=1 \
-		-e PERMIT_DOCKER=network\
+		-e PERMIT_DOCKER=network \
-		-h mail.my-domain.com -t $(NAME)
+		-e OVERRIDE_HOSTNAME=mail.my-domain.com \
+		-t $(NAME)
 	sleep 15
 	docker run -d --name mail_fail2ban \
 		-v "`pwd`/test/config":/tmp/docker-mailserver \

README.md

@@ -201,6 +201,11 @@ Otherwise, `iptables` won't be able to ban IPs.
   - **empty** => admin
   - => Specify the password to bind against ldap
 
+##### OVERRIDE_HOSTNAE
+
+  - **empty** => uses the `hostname` command to get the mail server's canonical hostname
+  - => Specify a fully-qualified domainname to serve mail for.  This is used for many of the config features so if you can't set your hostname (e.g. you're in a container platform that doesn't let you) specify it in this environment variable.
+
 ##### POSTMASTER_ADDRESS
 
   - **empty** => postmaster@domain.com

target/start-mailserver.sh

@@ -18,6 +18,7 @@ DEFAULT_VARS["ENABLE_SASLAUTHD"]="${ENABLE_SASLAUTHD:="0"}"
 DEFAULT_VARS["SMTP_ONLY"]="${SMTP_ONLY:="0"}"
 DEFAULT_VARS["VIRUSMAILS_DELETE_DELAY"]="${VIRUSMAILS_DELETE_DELAY:="7"}"
 DEFAULT_VARS["DMS_DEBUG"]="${DMS_DEBUG:="0"}"
+DEFAULT_VARS["OVERRIDE_HOSTNAME"]="${OVERRIDE_HOSTNAME}"
 ##########################################################################
 # << DEFAULT VARS
 ##########################################################################
@@ -94,6 +95,7 @@ function register_functions() {
 	_register_setup_function "_setup_docker_permit"
 
 	_register_setup_function "_setup_mailname"
+	_register_setup_function "_setup_amavis"
 
 	_register_setup_function "_setup_postfix_override_configuration"
 	_register_setup_function "_setup_postfix_sasl_password"
@@ -158,7 +160,7 @@ function register_functions() {
 		_register_start_daemon "_start_daemons_clamav"
 	fi
 
-  _register_start_daemon "_start_daemons_amavis"
+	_register_start_daemon "_start_daemons_amavis"
 	################### << daemon funcs
 }
 ##########################################################################
@@ -315,12 +317,18 @@ function check() {
 }
 
 function _check_hostname() {
-	notify "task" "Check that hostname/domainname is provided (no default docker hostname) [$FUNCNAME]"
+	notify "task" "Check that hostname/domainname is provided or overidden (no default docker hostname/kubernetes) [$FUNCNAME]"
+
+	if [[ ! -z ${DEFAULT_VARS["OVERRIDE_HOSTNAME"]} ]]; then
+		export HOSTNAME=${DEFAULT_VARS["OVERRIDE_HOSTNAME"]}
+		export DOMAINNAME=$(echo $HOSTNAME | sed s/[^.]*.//)
+	fi
 
 	if ( ! echo $HOSTNAME | grep -E '^(\S+[.]\S+)$' > /dev/null ); then
 		notify 'err' "Setting hostname/domainname is required"
 		return 1
 	else 
+		notify 'inf' "Domain has been set to $DOMAINNAME"
 		notify 'inf' "Hostname has been set to $HOSTNAME"
 		return 0
 	fi
@@ -364,6 +372,13 @@ function _setup_mailname() {
 	echo $DOMAINNAME > /etc/mailname
 }
 
+function _setup_amavis() {
+	notify 'task' 'Setting up Amavis'
+
+	notify 'inf' "Applying hostname to /etc/amavis/conf.d/05-node_id"
+	sed -i 's/^#\$myhostname = "mail.example.com";/\$myhostname = "'$HOSTNAME'";/' /etc/amavis/conf.d/05-node_id
+}
+
 function _setup_dovecot() {
 	notify 'task' 'Setting up Dovecot'
 
@@ -1011,17 +1026,8 @@ function _start_daemons_clamav() {
 function _start_daemons_amavis() {
 	notify 'task' 'Starting amavis' 'n'
 	display_startup_daemon "/etc/init.d/amavis start"
-
-	# @TODO fix: on integration test of mail_with_ldap amavis fails because of:
-	# Starting amavisd:   The value of variable $myhostname is "ldap", but should have been
-	# a fully qualified domain name; perhaps uname(3) did not provide such.
-	# You must explicitly assign a FQDN of this host to variable $myhostname
-	# in /etc/amavis/conf.d/05-node_id, or fix what uname(3) provides as a host's 
-	# network name!
-
-	# > temporary workaround to pass integration test
-	return 0
 }
+
 ##########################################################################
 # << Start Daemons
 ##########################################################################

test/tests.bats

@@ -9,6 +9,11 @@ load 'test_helper/bats-assert/load'
   assert_failure
 }
 
+@test "checking configuration: hostname/domainname override" {
+  run docker exec mail_smtponly /bin/bash -c "cat /etc/mailname | grep my-domain.com"
+  assert_success
+}
+
 #
 # processes
 #