add support for ldap - closes #61

Signed-off-by: Marcin Fabrykowski <git@fabrykowski.pl>

chart/templates/deployment.yml

@@ -30,8 +30,8 @@ spec:
             name: vmail
       volumes:
         - name: dovecot-config
-          secret:
-            secretName: dovecot-conf
+          configMap:
+            name: dovecot-conf
         - name: vmail
           persistentVolumeClaim:
             claimName: postfix-vmail

chart/templates/dovecot_configs.yml

@@ -6,10 +6,14 @@ data:
   dovecot.conf: |
     # 2.3.15 (0503334ab1): /etc/dovecot/dovecot.conf
     # Pigeonhole version 0.5.15 (e6a84e31)
-    # OS: Linux 5.14.18-300.fc35.x86_64 x86_64
+    # OS: Linux 5.14.18-300.fc35.x86_64 x86_64  btrfs
     # Hostname: fee040f9de2e
+    first_valid_uid = 100
     log_path = /dev/stdout
     mail_debug = yes
+    mail_gid = 102
+    mail_location = maildir:/var/lib/vmail/%d/%u/
+    mail_uid = 101
     managesieve_notify_capability = mailto
     managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext
     mbox_write_locks = fcntl
@@ -34,8 +38,8 @@ data:
       prefix =
     }
     passdb {
-      args = scheme=CRYPT username_format=%u /etc/dovecot/users
-      driver = passwd-file
+      args = /etc/dovecot/dovecot-ldap.conf.ext
+      driver = ldap
     }
     plugin {
       sieve = file:~/sieve;active=~/.dovecot.sieve
@@ -45,6 +49,12 @@ data:
     ssl_key = </etc/ssl/dovecot/server.key
     ssl_prefer_server_ciphers = yes
     userdb {
-      args = username_format=%u /etc/dovecot/users
-      driver = passwd-file
+      args = /etc/dovecot/dovecot-ldap.conf.ext
+      driver = ldap
     }
+  dovecot-ldap.conf.ext: |
+    uris = {{ .Values.ldap.uri }}
+    auth_bind = yes
+    auth_bind_userdn = maildrop=%u,{{ .Values.ldap.base }}
+    base = {{ .Values.ldap.base }}
+    user_filter = (&(objectClass=postfixUser)(maildrop=%u))

chart/values.yaml

+ldap:
+  uri: ldap://example.com
+  base: dc=example,dc=com
 dovecot:
   image: registry.gitlab.exphost.pl/exphost/dovecot
   tag: v0.1.0