config: PushACLs, sinks are also just ClientMappings & LOCAL_TRANSPORT_IDENTITY

cmd/config.go

@@ -45,7 +45,7 @@ type Pull struct {
 	From    *Pool
 	Mapping zfs.DatasetMapping
 }
-type Sink struct {
+type ClientMapping struct {
 	From    string
 	Mapping zfs.DatasetMapping
 }
@@ -54,7 +54,8 @@ type Config struct {
 	Pools    []Pool
 	Pushs    []Push
 	Pulls    []Pull
-	Sinks []Sink
+	Sinks    []ClientMapping
+	PullACLs []ClientMapping
 }
 
 func ParseConfig(path string) (config Config, err error) {
@@ -94,7 +95,10 @@ func parseMain(root map[string]interface{}) (c Config, err error) {
 	if c.Pulls, err = parsePulls(root["pulls"], poolLookup); err != nil {
 		return
 	}
-	if c.Sinks, err = parseSinks(root["sinks"]); err != nil {
+	if c.Sinks, err = parseClientMappings(root["sinks"]); err != nil {
+		return
+	}
+	if c.PullACLs, err = parseClientMappings(root["pull_acls"]); err != nil {
 		return
 	}
 	return
@@ -112,6 +116,12 @@ func parsePools(v interface{}) (pools []Pool, err error) {
 
 	pools = make([]Pool, len(asList))
 	for i, p := range asList {
+
+		if p.Name == LOCAL_TRANSPORT_IDENTITY {
+			err = errors.New(fmt.Sprintf("pool name '%s' reserved for local pulls", LOCAL_TRANSPORT_IDENTITY))
+			return
+		}
+
 		var transport Transport
 		if transport, err = parseTransport(p.Transport); err != nil {
 			return
@@ -227,28 +237,34 @@ func parsePulls(v interface{}, pl poolLookup) (p []Pull, err error) {
 	return
 }
 
-func parseSinks(v interface{}) (sinks []Sink, err error) {
-
-	var asList []interface{}
+func expectList(v interface{}) (asList []interface{}, err error) {
 	var ok bool
 	if asList, ok = v.([]interface{}); !ok {
-		return nil, errors.New("expected list")
+		err = errors.New("expected list")
 	}
-
-	sinks = make([]Sink, len(asList))
-
-	for i, s := range asList {
-		var sink Sink
-		if sink, err = parseSink(s); err != nil {
-			return
-		}
-		sinks[i] = sink
-	}
-
 	return
 }
 
-func parseSink(v interface{}) (s Sink, err error) {
+func parseClientMappings(v interface{}) (cm []ClientMapping, err error) {
+
+	var asList []interface{}
+	if asList, err = expectList(v); err != nil {
+		return
+	}
+
+	cm = make([]ClientMapping, len(asList))
+
+	for i, e := range asList {
+		var m ClientMapping
+		if m, err = parseClientMapping(e); err != nil {
+			return
+		}
+		cm[i] = m
+	}
+	return
+}
+
+func parseClientMapping(v interface{}) (s ClientMapping, err error) {
 	t := struct {
 		From    string
 		Mapping map[string]string

cmd/sampleconf/zrepl.yml

@@ -2,17 +2,10 @@ pools:
   - name: offsite_backups
     transport:
       ssh:
-        zrepl_identity: db2
-        host: backups1.example.com
+        host: 192.168.122.6
         user: root
         port: 22
-        command: ssh
-        args: []
-
-  - name: local_mirror
-    transport:
-      local:
-        pool: mirrorpool
+        identity_file: /etc/zrepl/identities/offsite_backups
 
 pushs:
   - to: offsite_backups
@@ -26,7 +19,9 @@ pulls:
       # like in sinks
     }
 
-  - from: local_mirror
+  # local replication, only allowed in pull mode
+  # the from name 'local' is reserved for this purpose
+  - from: local
     mapping: {
       "tank/usr/home":"mirrorpool/foo/bar"
     }
@@ -79,3 +74,10 @@ sinks:
       "*":            backups/special_snowflake/remainingbackup
       # NOTE:         ^ alignment, should be possible, looks nicer
     }
+
+pull_acls:
+  # same synatx as in sinks, but the returned mapping does not matter
+  - from: office_backup
+    mapping: {
+      "tank/usr/home":"notnull"
+    }