Enforce retention policy minimum (currently 1 hour)

CHANGELOG.md

@@ -1,3 +1,8 @@
+## v0.9.0-rc11 [unreleased]
+
+### Features
+- [#1902](https://github.com/influxdb/influxdb/pull/1902): Enforce retention policies to have a minimum duraton.
+
 ## v0.9.0-rc10 [2015-03-09]
 
 ### Bugfixes

httpd/handler_test.go

@@ -371,7 +371,7 @@ func TestHandler_UpdateRetentionPolicy(t *testing.T) {
 	s := NewHTTPServer(srvr)
 	defer s.Close()
 
-	query := map[string]string{"q": "ALTER RETENTION POLICY bar ON foo REPLICATION 42 DURATION 1m DEFAULT"}
+	query := map[string]string{"q": "ALTER RETENTION POLICY bar ON foo REPLICATION 42 DURATION 2h DEFAULT"}
 	status, body := MustHTTP("GET", s.URL+`/query`, query, nil, "")
 
 	// Verify updated policy.

influxdb.go

@@ -74,6 +74,9 @@ var (
 	// ErrRetentionPolicyNameRequired is returned using a blank shard space name.
 	ErrRetentionPolicyNameRequired = errors.New("retention policy name required")
 
+	// ErrRetentionPolicyMinDuration is returned when creating replicaiton policy with a duration smaller than RetenionPolicyMinDuration.
+	ErrRetentionPolicyMinDuration = fmt.Errorf("retention policy duration needs to be at least %s", retentionPolicyMinDuration)
+
 	// ErrDefaultRetentionPolicyNotFound is returned when using the default
 	// policy on a database but the default has not been set.
 	ErrDefaultRetentionPolicyNotFound = errors.New("default retention policy not found")

server.go

@@ -43,6 +43,9 @@ const (
 
 	// DefaultShardRetention is the length of time before a shard is dropped.
 	DefaultShardRetention = 7 * (24 * time.Hour)
+
+	// Defines the minimum duration allowed for all retention policies
+	retentionPolicyMinDuration = time.Hour
 )
 
 // Server represents a collection of metadata and raw metric data.
@@ -1269,6 +1272,11 @@ func (s *Server) RetentionPolicies(database string) ([]*RetentionPolicy, error)
 
 // CreateRetentionPolicy creates a retention policy for a database.
 func (s *Server) CreateRetentionPolicy(database string, rp *RetentionPolicy) error {
+	// Enforce duration of at least retentionPolicyMinDuration
+	if rp.Duration < retentionPolicyMinDuration {
+		return ErrRetentionPolicyMinDuration
+	}
+
 	const (
 		day   = time.Hour * 24
 		month = day * 30
@@ -1335,6 +1343,11 @@ type RetentionPolicyUpdate struct {
 
 // UpdateRetentionPolicy updates an existing retention policy on a database.
 func (s *Server) UpdateRetentionPolicy(database, name string, rpu *RetentionPolicyUpdate) error {
+	// Enforce duration of at least retentionPolicyMinDuration
+	if *rpu.Duration < retentionPolicyMinDuration {
+		return ErrRetentionPolicyMinDuration
+	}
+
 	c := &updateRetentionPolicyCommand{Database: database, Name: name, Policy: rpu}
 	_, err := s.broadcast(updateRetentionPolicyMessageType, c)
 	return err
@@ -2558,20 +2571,20 @@ func (s *Server) executeShowUsersStatement(q *influxql.ShowUsersStatement, user
 	return &Result{Series: []*influxql.Row{row}}
 }
 
-func (s *Server) executeCreateRetentionPolicyStatement(q *influxql.CreateRetentionPolicyStatement, user *User) *Result {
-	rp := NewRetentionPolicy(q.Name)
-	rp.Duration = q.Duration
-	rp.ReplicaN = uint32(q.Replication)
+func (s *Server) executeCreateRetentionPolicyStatement(stmt *influxql.CreateRetentionPolicyStatement, user *User) *Result {
+	rp := NewRetentionPolicy(stmt.Name)
+	rp.Duration = stmt.Duration
+	rp.ReplicaN = uint32(stmt.Replication)
 
 	// Create new retention policy.
-	err := s.CreateRetentionPolicy(q.Database, rp)
+	err := s.CreateRetentionPolicy(stmt.Database, rp)
 	if err != nil {
 		return &Result{Err: err}
 	}
 
 	// If requested, set new policy as the default.
-	if q.Default {
-		err = s.SetDefaultRetentionPolicy(q.Database, q.Name)
+	if stmt.Default {
+		err = s.SetDefaultRetentionPolicy(stmt.Database, stmt.Name)
 	}
 
 	return &Result{Err: err}

server_test.go

@@ -556,7 +556,7 @@ func TestServer_CreateRetentionPolicy(t *testing.T) {
 func TestServer_CreateRetentionPolicy_ErrDatabaseNotFound(t *testing.T) {
 	s := OpenServer(NewMessagingClient())
 	defer s.Close()
-	if err := s.CreateRetentionPolicy("foo", &influxdb.RetentionPolicy{Name: "bar"}); err != influxdb.ErrDatabaseNotFound {
+	if err := s.CreateRetentionPolicy("foo", &influxdb.RetentionPolicy{Name: "bar", Duration: time.Hour}); err != influxdb.ErrDatabaseNotFound {
 		t.Fatal(err)
 	}
 }
@@ -566,7 +566,7 @@ func TestServer_CreateRetentionPolicy_ErrRetentionPolicyNameRequired(t *testing.
 	s := OpenServer(NewMessagingClient())
 	defer s.Close()
 	s.CreateDatabase("foo")
-	if err := s.CreateRetentionPolicy("foo", &influxdb.RetentionPolicy{Name: ""}); err != influxdb.ErrRetentionPolicyNameRequired {
+	if err := s.CreateRetentionPolicy("foo", &influxdb.RetentionPolicy{Name: "", Duration: time.Hour}); err != influxdb.ErrRetentionPolicyNameRequired {
 		t.Fatal(err)
 	}
 }
@@ -576,8 +576,18 @@ func TestServer_CreateRetentionPolicy_ErrRetentionPolicyExists(t *testing.T) {
 	s := OpenServer(NewMessagingClient())
 	defer s.Close()
 	s.CreateDatabase("foo")
-	s.CreateRetentionPolicy("foo", &influxdb.RetentionPolicy{Name: "bar"})
-	if err := s.CreateRetentionPolicy("foo", &influxdb.RetentionPolicy{Name: "bar"}); err != influxdb.ErrRetentionPolicyExists {
+	s.CreateRetentionPolicy("foo", &influxdb.RetentionPolicy{Name: "bar", Duration: time.Hour})
+	if err := s.CreateRetentionPolicy("foo", &influxdb.RetentionPolicy{Name: "bar", Duration: time.Hour}); err != influxdb.ErrRetentionPolicyExists {
+		t.Fatal(err)
+	}
+}
+
+// Ensure the server returns an error when creating a retention policy with a duration less than one hour.
+func TestServer_CreateRetentionPolicy_ErrRetentionPolicyMinDuration(t *testing.T) {
+	s := OpenServer(NewMessagingClient())
+	defer s.Close()
+	s.CreateDatabase("foo")
+	if err := s.CreateRetentionPolicy("foo", &influxdb.RetentionPolicy{Name: "bar", Duration: time.Minute}); err != influxdb.ErrRetentionPolicyMinDuration {
 		t.Fatal(err)
 	}
 }
@@ -603,7 +613,7 @@ func TestServer_AlterRetentionPolicy(t *testing.T) {
 	}
 
 	// Alter the retention policy.
-	duration := time.Minute
+	duration := 2 * time.Hour
 	replicaN := uint32(3)
 	rp2 := &influxdb.RetentionPolicyUpdate{
 		Duration: &duration,
@@ -646,14 +656,67 @@ func TestServer_AlterRetentionPolicy(t *testing.T) {
 	}
 }
 
+// Ensure the server an error is returned if trying to alter a retention policy with a duration too small.
+func TestServer_AlterRetentionPolicy_Minduration(t *testing.T) {
+	s := OpenServer(NewMessagingClient())
+	defer s.Close()
+
+	// Create a database.
+	if err := s.CreateDatabase("foo"); err != nil {
+		t.Fatal(err)
+	}
+
+	// Create a retention policy on the database.
+	rp := &influxdb.RetentionPolicy{
+		Name:     "bar",
+		Duration: time.Hour,
+		ReplicaN: 2,
+	}
+	if err := s.CreateRetentionPolicy("foo", rp); err != nil {
+		t.Fatal(err)
+	}
+
+	// Alter the retention policy.
+	duration := 2 * time.Hour
+	replicaN := uint32(3)
+	rp2 := &influxdb.RetentionPolicyUpdate{
+		Duration: &duration,
+		ReplicaN: &replicaN,
+	}
+	if err := s.UpdateRetentionPolicy("foo", "bar", rp2); err != nil {
+		t.Fatal(err)
+	}
+
+	// Restart the server to make sure the changes persist afterwards.
+	s.Restart()
+
+	// Verify that the policy exists.
+	if o, err := s.RetentionPolicy("foo", "bar"); err != nil {
+		t.Fatalf("unexpected error: %s", err)
+	} else if o == nil {
+		t.Fatalf("retention policy not found")
+	} else if o.Duration != *rp2.Duration {
+		t.Fatalf("retention policy mismatch:\n\texp Duration = %s\n\tgot Duration = %s\n", rp2.Duration, o.Duration)
+	} else if o.ReplicaN != *rp2.ReplicaN {
+		t.Fatalf("retention policy mismatch:\n\texp ReplicaN = %d\n\tgot ReplicaN = %d\n", rp2.ReplicaN, o.ReplicaN)
+	}
+
+	// Test update duration only.
+	duration = time.Hour
+	results := s.ExecuteQuery(MustParseQuery(`ALTER RETENTION POLICY bar ON foo DURATION 1m`), "foo", nil)
+	if results.Error() == nil {
+		t.Fatalf("unexpected error: %s", results.Error())
+	}
+}
+
 // Ensure the server can delete an existing retention policy.
 func TestServer_DeleteRetentionPolicy(t *testing.T) {
 	s := OpenServer(NewMessagingClient())
 	defer s.Close()
 
 	// Create a database and retention policy.
 	s.CreateDatabase("foo")
-	if err := s.CreateRetentionPolicy("foo", &influxdb.RetentionPolicy{Name: "bar"}); err != nil {
+	if err := s.CreateRetentionPolicy("foo", &influxdb.RetentionPolicy{Name: "bar", Duration: time.Hour}); err != nil {
 		t.Fatal(err)
 	} else if rp, _ := s.RetentionPolicy("foo", "bar"); rp == nil {
 		t.Fatal("retention policy not created")
@@ -707,7 +770,7 @@ func TestServer_SetDefaultRetentionPolicy(t *testing.T) {
 	defer s.Close()
 	s.CreateDatabase("foo")
 
-	rp := &influxdb.RetentionPolicy{Name: "bar", ShardGroupDuration: 7 * time.Hour * 24}
+	rp := &influxdb.RetentionPolicy{Name: "bar", ShardGroupDuration: time.Hour, Duration: time.Hour}
 	if err := s.CreateRetentionPolicy("foo", rp); err != nil {
 		t.Fatal(err)
 	} else if rp, _ := s.RetentionPolicy("foo", "bar"); rp == nil {
@@ -1630,7 +1693,7 @@ func TestServer_CreateShardGroupIfNotExist(t *testing.T) {
 	defer s.Close()
 	s.CreateDatabase("foo")
 
-	if err := s.CreateRetentionPolicy("foo", &influxdb.RetentionPolicy{Name: "bar"}); err != nil {
+	if err := s.CreateRetentionPolicy("foo", &influxdb.RetentionPolicy{Name: "bar", Duration: time.Hour}); err != nil {
 		t.Fatal(err)
 	}
 
@@ -1653,7 +1716,7 @@ func TestServer_DeleteShardGroup(t *testing.T) {
 	defer s.Close()
 	s.CreateDatabase("foo")
 
-	if err := s.CreateRetentionPolicy("foo", &influxdb.RetentionPolicy{Name: "bar"}); err != nil {
+	if err := s.CreateRetentionPolicy("foo", &influxdb.RetentionPolicy{Name: "bar", Duration: time.Hour}); err != nil {
 		t.Fatal(err)
 	}
 
@@ -1759,13 +1822,13 @@ func TestServer_NormalizeMeasurement(t *testing.T) {
 
 	// Default database with one policy.
 	s.CreateDatabase("db0")
-	s.CreateRetentionPolicy("db0", &influxdb.RetentionPolicy{Name: "rp0"})
+	s.CreateRetentionPolicy("db0", &influxdb.RetentionPolicy{Name: "rp0", Duration: time.Hour})
 	s.SetDefaultRetentionPolicy("db0", "rp0")
 
 	// Another database with two policies.
 	s.CreateDatabase("db1")
-	s.CreateRetentionPolicy("db1", &influxdb.RetentionPolicy{Name: "rp1"})
-	s.CreateRetentionPolicy("db1", &influxdb.RetentionPolicy{Name: "rp2"})
+	s.CreateRetentionPolicy("db1", &influxdb.RetentionPolicy{Name: "rp1", Duration: time.Hour})
+	s.CreateRetentionPolicy("db1", &influxdb.RetentionPolicy{Name: "rp2", Duration: time.Hour})
 	s.SetDefaultRetentionPolicy("db1", "rp1")
 
 	// Another database with no policies.
@@ -1804,7 +1867,7 @@ func TestServer_NormalizeQuery(t *testing.T) {
 	s := OpenServer(NewMessagingClient())
 	defer s.Close()
 	s.CreateDatabase("db0")
-	s.CreateRetentionPolicy("db0", &influxdb.RetentionPolicy{Name: "rp0"})
+	s.CreateRetentionPolicy("db0", &influxdb.RetentionPolicy{Name: "rp0", Duration: time.Hour})
 	s.SetDefaultRetentionPolicy("db0", "rp0")
 
 	// Execute the tests
@@ -1828,7 +1891,7 @@ func TestServer_CreateContinuousQuery(t *testing.T) {
 	if err := s.CreateDatabase("foo"); err != nil {
 		t.Fatal(err)
 	}
-	if err := s.CreateRetentionPolicy("foo", &influxdb.RetentionPolicy{Name: "bar"}); err != nil {
+	if err := s.CreateRetentionPolicy("foo", &influxdb.RetentionPolicy{Name: "bar", Duration: time.Hour}); err != nil {
 		t.Fatal(err)
 	}
 	s.SetDefaultRetentionPolicy("foo", "bar")