Close #124: Add support for Postgres as a storage solution

storage/store/sql/specific_postgres.go

@@ -0,0 +1,69 @@
+package sql
+
+func (s *Store) createPostgresSchema() error {
+	_, err := s.db.Exec(`
+		CREATE TABLE IF NOT EXISTS service (
+			service_id    BIGSERIAL PRIMARY KEY,
+			service_key   TEXT UNIQUE,
+			service_name  TEXT,
+			service_group TEXT,
+			UNIQUE(service_name, service_group)
+		)
+	`)
+	if err != nil {
+		return err
+	}
+	_, err = s.db.Exec(`
+		CREATE TABLE IF NOT EXISTS service_event (
+			service_event_id   BIGSERIAL PRIMARY KEY,
+			service_id         INTEGER REFERENCES service(service_id) ON DELETE CASCADE,
+			event_type         TEXT,
+			event_timestamp    TIMESTAMP
+		)
+	`)
+	if err != nil {
+		return err
+	}
+	_, err = s.db.Exec(`
+		CREATE TABLE IF NOT EXISTS service_result (
+			service_result_id      BIGSERIAL PRIMARY KEY,
+			service_id             BIGINT REFERENCES service(service_id) ON DELETE CASCADE,
+			success                BOOLEAN,
+			errors                 TEXT,
+			connected              BOOLEAN,
+			status                 BIGINT,
+			dns_rcode              TEXT,
+			certificate_expiration BIGINT,
+			hostname               TEXT,
+			ip                     TEXT,
+			duration               BIGINT,
+			timestamp              TIMESTAMP
+		)
+	`)
+	if err != nil {
+		return err
+	}
+	_, err = s.db.Exec(`
+		CREATE TABLE IF NOT EXISTS service_result_condition (
+			service_result_condition_id  BIGSERIAL PRIMARY KEY,
+			service_result_id            BIGINT REFERENCES service_result(service_result_id) ON DELETE CASCADE,
+			condition                    TEXT,
+			success                      BOOLEAN
+		)
+	`)
+	if err != nil {
+		return err
+	}
+	_, err = s.db.Exec(`
+		CREATE TABLE IF NOT EXISTS service_uptime (
+			service_uptime_id     BIGSERIAL PRIMARY KEY,
+			service_id            BIGINT REFERENCES service(service_id) ON DELETE CASCADE,
+			hour_unix_timestamp   BIGINT,
+			total_executions      BIGINT,
+			successful_executions BIGINT,
+			total_response_time   BIGINT,
+			UNIQUE(service_id, hour_unix_timestamp)
+		)
+	`)
+	return err
+}