add syslog receiver support

go.mod

@@ -44,6 +44,7 @@ require (
 	github.com/open-telemetry/opentelemetry-collector-contrib/receiver/collectdreceiver v0.0.0-00010101000000-000000000000
 	github.com/open-telemetry/opentelemetry-collector-contrib/receiver/dockerstatsreceiver v0.0.0-00010101000000-000000000000
 	github.com/open-telemetry/opentelemetry-collector-contrib/receiver/filelogreceiver v0.0.0-00010101000000-000000000000
+	github.com/open-telemetry/opentelemetry-collector-contrib/receiver/syslogreceiver v0.0.0-00010101000000-000000000000
 	github.com/open-telemetry/opentelemetry-collector-contrib/receiver/jmxreceiver v0.0.0-00010101000000-000000000000
 	github.com/open-telemetry/opentelemetry-collector-contrib/receiver/k8sclusterreceiver v0.0.0-00010101000000-000000000000
 	github.com/open-telemetry/opentelemetry-collector-contrib/receiver/kubeletstatsreceiver v0.0.0-00010101000000-000000000000
@@ -180,6 +181,8 @@ replace github.com/open-telemetry/opentelemetry-collector-contrib/receiver/zooke
 
 replace github.com/open-telemetry/opentelemetry-collector-contrib/receiver/filelogreceiver => ./receiver/filelogreceiver
 
+replace github.com/open-telemetry/opentelemetry-collector-contrib/receiver/syslogreceiver => ./receiver/syslogreceiver
+
 replace github.com/open-telemetry/opentelemetry-collector-contrib/receiver/memcachedreceiver => ./receiver/memcachedreceiver
 
 replace github.com/open-telemetry/opentelemetry-collector-contrib/processor/groupbyattrsprocessor => ./processor/groupbyattrsprocessor

go.sum

@@ -1110,6 +1110,8 @@ github.com/onsi/gomega v1.10.4/go.mod h1:g/HbgYopi++010VEqkFgJHKC09uJiW9UkXvMUuK
 github.com/op/go-logging v0.0.0-20160315200505-970db520ece7/go.mod h1:HzydrMdWErDVzsI23lYNej1Htcns9BCg93Dk0bBINWk=
 github.com/open-telemetry/opentelemetry-log-collection v0.16.0 h1:5DCDDrx95Hg4GPl2trng/CtYoGD0W0fjKQ3v6NQWmL4=
 github.com/open-telemetry/opentelemetry-log-collection v0.16.0/go.mod h1:J1tOFFS2olDMZyiU1mtnCLnAv+uElKeYDbZ2ZAgjMU4=
+github.com/open-telemetry/opentelemetry-log-collection v0.16.1-0.20210315170618-aa8d82509c31 h1:FruNezloXnyrkbsQhprOfk0i1M5ftEOZ3sG0+lpRJP4=
+github.com/open-telemetry/opentelemetry-log-collection v0.16.1-0.20210315170618-aa8d82509c31/go.mod h1:9E7qy5/82Mr4FysOjfbxcHxk2+AXyOukDhdmezEjNdo=
 github.com/opencontainers/go-digest v1.0.0-rc1/go.mod h1:cMLVZDEM3+U2I4VmLI6N8jQYUd2OVphdqWwCJHrFt2s=
 github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
 github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
@@ -1133,6 +1135,7 @@ github.com/openzipkin/zipkin-go v0.2.1/go.mod h1:NaW6tEwdmWMaCDZzg8sh+IBNOxHMPnh
 github.com/openzipkin/zipkin-go v0.2.2/go.mod h1:NaW6tEwdmWMaCDZzg8sh+IBNOxHMPnhQw8ySjnjRyN4=
 github.com/openzipkin/zipkin-go v0.2.5 h1:UwtQQx2pyPIgWYHRg+epgdx1/HnBQTgN3/oIYEJTQzU=
 github.com/openzipkin/zipkin-go v0.2.5/go.mod h1:KpXfKdgRDnnhsxw4pNIH9Md5lyFqKUa4YDFlwRYAMyE=
+github.com/orijtech/prometheus-go-metrics-exporter v0.0.6/go.mod h1:BiTx/ugZex8LheBk3j53tktWaRdFjV5FCfT2o0P7msE=
 github.com/ory/go-acc v0.2.6/go.mod h1:4Kb/UnPcT8qRAk3IAxta+hvVapdxTLWtrr7bFLlEgpw=
 github.com/ory/viper v1.7.5/go.mod h1:ypOuyJmEUb3oENywQZRgeAMwqgOyDqwboO1tj3DjTaM=
 github.com/pact-foundation/pact-go v1.0.4/go.mod h1:uExwJY4kCzNPcHRj+hCR/HBbOOIwwtUjcrb0b5/5kLM=
@@ -1189,6 +1192,7 @@ github.com/prometheus/client_golang v0.9.3/go.mod h1:/TN21ttK/J9q6uSwhBd54HahCDf
 github.com/prometheus/client_golang v1.0.0/go.mod h1:db9x61etRT2tGnBNRi70OPL5FsnadC4Ky3P0J6CfImo=
 github.com/prometheus/client_golang v1.3.0/go.mod h1:hJaj2vgQTGQmVCsAACORcieXFeDPbaTKGT+JTgUa3og=
 github.com/prometheus/client_golang v1.4.0/go.mod h1:e9GMxYsXl05ICDXkRhurwBS4Q3OK1iX/F2sw+iXX5zU=
+github.com/prometheus/client_golang v1.4.1/go.mod h1:e9GMxYsXl05ICDXkRhurwBS4Q3OK1iX/F2sw+iXX5zU=
 github.com/prometheus/client_golang v1.5.1/go.mod h1:e9GMxYsXl05ICDXkRhurwBS4Q3OK1iX/F2sw+iXX5zU=
 github.com/prometheus/client_golang v1.6.0/go.mod h1:ZLOG9ck3JLRdB5MgO8f+lLTe83AXG6ro35rLTxvnIl4=
 github.com/prometheus/client_golang v1.7.1/go.mod h1:PY5Wy2awLA44sXw4AOSfFBetzPP4j5+D6mVACh+pe2M=

internal/stanza/go.mod

@@ -3,8 +3,7 @@ module github.com/open-telemetry/opentelemetry-collector-contrib/internal/stanza
 go 1.14
 
 require (
-	github.com/open-telemetry/opentelemetry-log-collection v0.16.0
-	github.com/pelletier/go-toml v1.8.0 // indirect
+	github.com/open-telemetry/opentelemetry-log-collection v0.16.1-0.20210315170618-aa8d82509c31
 	github.com/stretchr/testify v1.7.0
 	go.opentelemetry.io/collector v0.22.1-0.20210313012550-03904de3dd61
 	go.uber.org/zap v1.16.0

internal/stanza/go.sum

@@ -692,6 +692,8 @@ github.com/onsi/gomega v1.9.0/go.mod h1:Ho0h+IUsWyvy1OpqCwxlQ/21gkhVunqlU8fDGcoT
 github.com/op/go-logging v0.0.0-20160315200505-970db520ece7/go.mod h1:HzydrMdWErDVzsI23lYNej1Htcns9BCg93Dk0bBINWk=
 github.com/open-telemetry/opentelemetry-log-collection v0.16.0 h1:5DCDDrx95Hg4GPl2trng/CtYoGD0W0fjKQ3v6NQWmL4=
 github.com/open-telemetry/opentelemetry-log-collection v0.16.0/go.mod h1:J1tOFFS2olDMZyiU1mtnCLnAv+uElKeYDbZ2ZAgjMU4=
+github.com/open-telemetry/opentelemetry-log-collection v0.16.1-0.20210315170618-aa8d82509c31 h1:FruNezloXnyrkbsQhprOfk0i1M5ftEOZ3sG0+lpRJP4=
+github.com/open-telemetry/opentelemetry-log-collection v0.16.1-0.20210315170618-aa8d82509c31/go.mod h1:9E7qy5/82Mr4FysOjfbxcHxk2+AXyOukDhdmezEjNdo=
 github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
 github.com/opencontainers/image-spec v1.0.1/go.mod h1:BtxoFyWECRxE4U/7sNtV5W15zMzWCbyJoFRP3s7yZA0=
 github.com/opentracing-contrib/go-grpc v0.0.0-20191001143057-db30781987df/go.mod h1:DYR5Eij8rJl8h7gblRrOZ8g0kW1umSpKqYIBTgeDtLo=

receiver/filelogreceiver/go.mod

@@ -5,7 +5,7 @@ go 1.14
 require (
 	github.com/observiq/nanojack v0.0.0-20201106172433-343928847ebc
 	github.com/open-telemetry/opentelemetry-collector-contrib/internal/stanza v0.0.0-00010101000000-000000000000
-	github.com/open-telemetry/opentelemetry-log-collection v0.16.0
+	github.com/open-telemetry/opentelemetry-log-collection v0.16.1-0.20210315170618-aa8d82509c31
 	github.com/stretchr/testify v1.7.0
 	go.opentelemetry.io/collector v0.22.1-0.20210313012550-03904de3dd61
 	go.uber.org/zap v1.16.0

receiver/filelogreceiver/go.sum

@@ -799,6 +799,8 @@ github.com/onsi/gomega v1.9.0/go.mod h1:Ho0h+IUsWyvy1OpqCwxlQ/21gkhVunqlU8fDGcoT
 github.com/op/go-logging v0.0.0-20160315200505-970db520ece7/go.mod h1:HzydrMdWErDVzsI23lYNej1Htcns9BCg93Dk0bBINWk=
 github.com/open-telemetry/opentelemetry-log-collection v0.16.0 h1:5DCDDrx95Hg4GPl2trng/CtYoGD0W0fjKQ3v6NQWmL4=
 github.com/open-telemetry/opentelemetry-log-collection v0.16.0/go.mod h1:J1tOFFS2olDMZyiU1mtnCLnAv+uElKeYDbZ2ZAgjMU4=
+github.com/open-telemetry/opentelemetry-log-collection v0.16.1-0.20210315170618-aa8d82509c31 h1:FruNezloXnyrkbsQhprOfk0i1M5ftEOZ3sG0+lpRJP4=
+github.com/open-telemetry/opentelemetry-log-collection v0.16.1-0.20210315170618-aa8d82509c31/go.mod h1:9E7qy5/82Mr4FysOjfbxcHxk2+AXyOukDhdmezEjNdo=
 github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
 github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
 github.com/opencontainers/image-spec v1.0.1 h1:JMemWkRwHx4Zj+fVxWoMCFm/8sYGGrUVojFA6h/TRcI=

receiver/syslogreceiver/Makefile

@@ -0,0 +1 @@
+include ../../Makefile.Common

receiver/syslogreceiver/README.md

@@ -0,0 +1,69 @@
+# Syslog Receiver
+
+Parses Syslogs from tcp/udp using
+the [opentelemetry-log-collection](https://github.com/open-telemetry/opentelemetry-log-collection) library.
+
+Supported pipeline types: logs
+
+> :construction: This receiver is in alpha and configuration fields are subject to change.
+
+## Configuration
+
+| Field      | Default          | Description                                                  |
+| ---------- | ---------------- | ------------------------------------------------------------ |
+| `id`       | `syslog_input`   | A unique identifier for the operator                         |
+| `udp`      |`nil`                | Defined udp_input operator. (see the UDP configuration section)  |
+| `tcp`      | `nil`               | Defined tcp_input operator. (see the TCP configuration section)  |
+| `protocol`    | required         | The protocol to parse the syslog messages as. Options are `rfc3164` and `rfc5424`                                                                                                                                                        |
+| `location`    | `UTC`            | The geographic location (timezone) to use when parsing the timestamp (Syslog RFC 3164 only). The available locations depend on the local IANA Time Zone database. [This page](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones) contains many examples, such as `America/New_York`. |
+| `timestamp`   | `nil`            | An optional [timestamp](https://github.com/open-telemetry/opentelemetry-log-collection/blob/main/docs/types/timestamp.md) block which will parse a timestamp field before passing the entry to the output operator                                                                                               |
+| `severity`    | `nil`            | An optional [severity](https://github.com/open-telemetry/opentelemetry-log-collection/blob/main/docs/docs/types/severity.md) block which will parse a severity field before passing the entry to the output operator
+| `attributes`   | {}               | A map of `key: value` labels to add to the entry's attributes    |
+| `resource` | {}               | A map of `key: value` labels to add to the entry's resource  |
+
+### UDP Configuration
+
+| Field             | Default          | Description                                                                       |
+| ---               | ---              | ---                                                                               |
+| `listen_address`  | required         | A listen address of the form `<ip>:<port>`                                        |
+
+### TCP Configuration
+
+| Field             | Default          | Description                                                                       |
+| ---               | ---              | ---                                                                               |
+| `max_buffer_size` | `1024kib`        | Maximum size of buffer that may be allocated while reading TCP input              |
+| `listen_address`  | required         | A listen address of the form `<ip>:<port>`                                        |
+| `tls`             |                  | An optional `TLS` configuration (see the TLS configuration section)               |
+
+#### TLS Configuration
+
+The `tcp_input` operator supports TLS, disabled by default.
+
+| Field             | Default          | Description                               |
+| ---               | ---              | ---                                       |
+| `cert_file`       |                  | Path to the TLS cert to use for TLS required connections.       |
+| `key_file`        |                  | Path to the TLS key to use for TLS required connections.|
+| `ca_file`         |                  | Path to the CA cert. For a client this verifies the server certificate. For a server this verifies client certificates. If empty uses system root CA.  |
+| `client_ca_file`  |                  | (optional) Path to the TLS cert to use by the server to verify a client certificate. This sets the ClientCAs and ClientAuth to RequireAndVerifyClientCert in the TLSConfig. Please refer to godoc.org/crypto/tls#Config for more information.
+|
+
+## Example Configurations
+
+TCP Configuration:
+
+```yaml
+- type: syslog_input
+  protocol: rfc5424
+  tcp:
+    listen_address: "0.0.0.0:54526"
+```
+
+UDP Configuration:
+
+```yaml
+- type: syslog_input
+  udp:
+    listen_address: "0.0.0.0:54526"
+  protocol: rfc3164
+  location: UTC
+```

receiver/syslogreceiver/doc.go

@@ -0,0 +1,15 @@
+// Copyright 2021 OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package syslogreceiver

receiver/syslogreceiver/go.mod

@@ -0,0 +1,14 @@
+module github.com/open-telemetry/opentelemetry-collector-contrib/receiver/syslogreceiver
+
+go 1.14
+
+require (
+	github.com/open-telemetry/opentelemetry-collector-contrib/internal/stanza v0.0.0-00010101000000-000000000000
+	github.com/open-telemetry/opentelemetry-log-collection v0.16.1-0.20210315170618-aa8d82509c31
+	github.com/stretchr/testify v1.7.0
+	go.opentelemetry.io/collector v0.22.1-0.20210313012550-03904de3dd61
+	go.uber.org/zap v1.16.0
+	gopkg.in/yaml.v2 v2.4.0
+)
+
+replace github.com/open-telemetry/opentelemetry-collector-contrib/internal/stanza => ../../internal/stanza