feat: add error log skywalking reporter

apisix/plugins/error-log-logger.lua

@@ -20,6 +20,7 @@ local errlog = require("ngx.errlog")
 local batch_processor = require("apisix.utils.batch-processor")
 local plugin = require("apisix.plugin")
 local timers = require("apisix.timers")
+local http = require("resty.http")
 local plugin_name = "error-log-logger"
 local table = core.table
 local schema_def = core.schema
@@ -36,23 +37,50 @@ local lrucache = core.lrucache.new({
 local metadata_schema = {
     type = "object",
     properties = {
-        host = schema_def.host_def,
-        port = {type = "integer", minimum = 0},
-        tls = {type = "boolean", default = false},
-        tls_server_name = {type = "string"},
-        timeout = {type = "integer", minimum = 1, default = 3},
-        keepalive = {type = "integer", minimum = 1, default = 30},
+        type = {type = "string", default = "TCP", enum = {"TCP", "SKYWALKING"}},
+        tcp = {
+            type = "object",
+            properties = {
+                host = schema_def.host_def,
+                port = {type = "integer", minimum = 0},
+                tls = {type = "boolean", default = false},
+                tls_server_name = {type = "string"},
+            },
+            required = {"host", "port"}
+        },
+        skywalking = {
+            type = "object",
+            properties = {
+                endpoint_addr = {schema_def.uri, default = "http://127.0.0.1:12900/v3/logs"},
+                service_name = {type = "string", default = "APISIX"},
+                service_instance_name = {type="string", default = "APISIX Service Instance"},
+            },
+            required = {"endpoint_addr"}
+        },
+        host = {schema_def.host_def, description = "Deprecated, use `tcp.host` instead."},
+        port = {type = "integer", minimum = 0, description = "Deprecated, use `tcp.port` instead."},
+        tls = {type = "boolean", default = false,
+                description = "Deprecated, use `tcp.tls` instead."},
+        tls_server_name = {type = "string",
+                description = "Deprecated, use `tcp.tls_server_name` instead."},
         name = {type = "string", default = plugin_name},
         level = {type = "string", default = "WARN", enum = {"STDERR", "EMERG", "ALERT", "CRIT",
                 "ERR", "ERROR", "WARN", "NOTICE", "INFO", "DEBUG"}},
+        timeout = {type = "integer", minimum = 1, default = 3},
+        keepalive = {type = "integer", minimum = 1, default = 30},
         batch_max_size = {type = "integer", minimum = 0, default = 1000},
         max_retry_count = {type = "integer", minimum = 0, default = 0},
         retry_delay = {type = "integer", minimum = 0, default = 1},
         buffer_duration = {type = "integer", minimum = 1, default = 60},
         inactive_timeout = {type = "integer", minimum = 1, default = 3},
     },
-    required = {"host", "port"}
+    oneOf = {
+        {required = {"skywalking"}},
+        {required = {"tcp"}}
+    }
 }
+
+
 local schema = {
     type = "object",
 }
@@ -85,7 +113,15 @@ local _M = {
 }
 
 
-local function send_to_server(data)
+function _M.check_schema(conf, schema_type)
+    if schema_type == core.schema.TYPE_METADATA then
+        return core.schema.check(metadata_schema, conf)
+    end
+    return core.schema.check(schema, conf)
+end
+
+
+local function send_to_tcp_server(data)
     local sock, soc_err = tcp()
 
     if not sock then
@@ -94,33 +130,92 @@ local function send_to_server(data)
 
     sock:settimeout(config.timeout * 1000)
 
-    local ok, err = sock:connect(config.host, config.port)
+    local tcp_config = config.tcp
+    local ok, err = sock:connect(tcp_config.host, tcp_config.port)
     if not ok then
-        return false, "failed to connect the TCP server: host[" .. config.host
-            .. "] port[" .. tostring(config.port) .. "] err: " .. err
+        return false, "failed to connect the TCP server: host[" .. tcp_config.host
+            .. "] port[" .. tostring(tcp_config.port) .. "] err: " .. err
     end
 
-    if config.tls then
-        ok, err = sock:sslhandshake(false, config.tls_server_name, false)
+    if tcp_config.tls then
+        ok, err = sock:sslhandshake(false, tcp_config.tls_server_name, false)
         if not ok then
             sock:close()
             return false, "failed to perform TLS handshake to TCP server: host["
-                .. config.host .. "] port[" .. tostring(config.port) .. "] err: " .. err
+                .. tcp_config.host .. "] port[" .. tostring(tcp_config.port) .. "] err: " .. err
         end
     end
 
     local bytes, err = sock:send(data)
     if not bytes then
         sock:close()
-        return false, "failed to send data to TCP server: host[" .. config.host
-            .. "] port[" .. tostring(config.port) .. "] err: " .. err
+        return false, "failed to send data to TCP server: host[" .. tcp_config.host
+            .. "] port[" .. tostring(tcp_config.port) .. "] err: " .. err
     end
 
     sock:setkeepalive(config.keepalive * 1000)
     return true
 end
 
 
+local function send_to_skywalking(log_message)
+    local err_msg
+    local res = true
+    core.log.info("sending a batch logs to ", config.skywalking.endpoint_addr)
+
+    local httpc = http.new()
+    httpc:set_timeout(config.timeout * 1000)
+
+    local entries = {}
+    for i = 1, #log_message, 2 do
+        if not log_message[i] then
+            core.log.warn("------------------ : " .. tostring(i))
+        end
+        local content = {
+            service = config.skywalking.service_name,
+            serviceInstance = config.skywalking.service_instance_name,
+            endpoint = "",
+            body = {
+                text = {
+                    text = log_message[i]
+                }
+           }
+        }
+        table.insert(entries, content)
+    end
+
+    local httpc_res, httpc_err = httpc:request_uri(
+        config.skywalking.endpoint_addr,
+        {
+            method = "POST",
+            body = core.json.encode(entries),
+            keepalive_timeout = config.keepalive * 1000,
+            headers = {
+                ["Content-Type"] = "application/json",
+            }
+        }
+    )
+
+    if not httpc_res then
+        return false, "error while sending data to skywalking["
+            .. config.skywalking.endpoint_addr .. "] " .. httpc_err
+    end
+
+    -- some error occurred in the server
+    if httpc_res.status >= 400 then
+        res =  false
+        err_msg = string.format(
+            "server returned status code[%s] skywalking[%s] body[%s]",
+            httpc_res.status,
+            config.skywalking.endpoint_addr.endpoint_addr,
+            httpc_res:read_body()
+        )
+    end
+
+    return res, err_msg
+end
+
+
 local function update_filter(value)
     local level = log_level[string.upper(value.level)]
     local status, err = errlog.set_filter_level(level)
@@ -134,6 +229,14 @@ local function update_filter(value)
 end
 
 
+local function send(data)
+    if config.tcp then
+        return send_to_tcp_server(data)
+    end
+    return send_to_skywalking(data)
+end
+
+
 local function process()
     local metadata = plugin.plugin_metadata(plugin_name)
     if not (metadata and metadata.value and metadata.modifiedIndex) then
@@ -180,7 +283,7 @@ local function process()
     }
 
     local err
-    log_buffer, err = batch_processor:new(send_to_server, config_bat)
+    log_buffer, err = batch_processor:new(send, config_bat)
 
     if not log_buffer then
         core.log.warn("error when creating the batch processor: ", err)

docs/en/latest/plugins/error-log-logger.md

@@ -30,31 +30,39 @@ title: error-log-logger
 
 ## Name
 
-`error-log-logger` is a plugin which pushes the log data of APISIX's error.log to TCP servers.
+`error-log-logger` is a plugin which pushes the log data of APISIX's `error.log` to TCP servers or [Apache SkyWalking](https://skywalking.apache.org/).
 
-This plugin will provide the ability to send the log data which selected by the level to Monitoring tools and other TCP servers.
+This plugin will provide the ability to send the log data which selected by the level to Monitoring tools and other TCP servers, and SkyWalking over HTTP.
 
-This plugin provides the ability as a batch to push the log data to your external TCP servers. If not receive the log data, don't worry, it will automatically send the logs after the timer function expires in our Batch Processor.
+This plugin provides the ability as a batch to push the log data to your external TCP servers or monitoring tools. If not receive the log data, don't worry, it will automatically send the logs after the timer function expires in our Batch Processor.
 
 For more info on Batch-Processor in Apache APISIX please refer.
 [Batch-Processor](../batch-processor.md)
 
 ## Attributes
 
-| Name             | Type    | Requirement | Default | Valid   | Description                                                                              |
-| ---------------- | ------- | ----------- | ------- | ------- | ---------------------------------------------------------------------------------------- |
-| host             | string  | required    |         |         | IP address or the Hostname of the TCP server.                                            |
-| port             | integer | required    |         | [0,...] | Target upstream port.                                                                    |
-| timeout          | integer | optional    | 3       | [1,...] | Timeout for the upstream to connect and send, unit: second.                                                   |
-| keepalive        | integer | optional    | 30      | [1,...] | Time for keeping the cosocket alive, unit: second.                                                   |
-| level            | string  | optional    | WARN    |         | The filter's log level, default warn, choose the level in ["STDERR", "EMERG", "ALERT", "CRIT", "ERR", "ERROR", "WARN", "NOTICE", "INFO", "DEBUG"], the value ERR equals ERROR.         |
-| tls              | boolean | optional    | false   |         | Control whether to perform SSL verification                                              |
-| tls_server_name  | string  | optional    |         |         | The server name for the new TLS extension  SNI                                                            |
-| batch_max_size   | integer | optional    | 1000    | [1,...] | Max size of each batch                                                                   |
-| inactive_timeout | integer | optional    | 3       | [1,...] | Maximum age in seconds when the buffer will be flushed if inactive                       |
-| buffer_duration  | integer | optional    | 60      | [1,...] | Maximum age in seconds of the oldest entry in a batch before the batch must be processed |
-| max_retry_count  | integer | optional    | 0       | [0,...] | Maximum number of retries before removing from the processing pipe line                  |
-| retry_delay      | integer | optional    | 1       | [0,...] | Number of seconds the process execution should be delayed if the execution fails         |
+| Name                             | Type    | Requirement | Default                        | Valid   | Description                                                                               |
+| -------------------------------- | ------- | ----------- | ------------------------------ | ------- | ----------------------------------------------------------------------------------------- |
+| tcp.host                         | string  | required    |                                |         | IP address or the Hostname of the TCP server.                                             |
+| tcp.port                         | integer | required    |                                | [0,...] | Target upstream port.                                                                     |
+| tcp.tls                          | boolean | optional    | false                          |         | Control whether to perform SSL verification.                                              |
+| tcp.tls_server_name              | string  | optional    |                                |         | The server name for the new TLS extension  SNI.                                           |
+| skywalking.endpoint_addr         | string  | required    | http://127.0.0.1:12900/v3/logs |         | the http endpoint of Skywalking.                                                          |
+| skywalking.service_name          | string  | optional    | APISIX                         |         | service name for skywalking reporter                                                      |
+| skywalking.service_instance_name | String  | optional    | APISIX Instance Name           |         | Service instance name for skywalking reporter, set it to `$hostname` to get local hostname directly.|
+| timeout                          | integer | optional    | 3                              | [1,...] | (`Deprecated`) Timeout for the upstream to connect and send, unit: second.                |
+| host                             | string  | optional    |                                |         | IP address or the Hostname of the TCP server.                                             |
+| port                             | integer | optional    |                                | [0,...] | (`Deprecated`) Target upstream port.                                                      |
+| tls                              | boolean | optional    | false                          |         | (`Deprecated`) Control whether to perform SSL verification.                               |
+| tls_server_name                  | string  | optional    |                                |         | (`Deprecated`) The server name for the new TLS extension SNI.                             |
+| timeout                          | integer | optional    | 3                              | [1,...] | Timeout for the upstream to connect and send, unit: second.                               |
+| keepalive                        | integer | optional    | 30                             | [1,...] | Time for keeping the cosocket alive, unit: second.                                        |
+| level                            | string  | optional    | WARN                           |         | The filter's log level, default warn, choose the level in ["STDERR", "EMERG", "ALERT", "CRIT", "ERR", "ERROR", "WARN", "NOTICE", "INFO", "DEBUG"], the value ERR equals ERROR.         |
+| batch_max_size                   | integer | optional    | 1000                           | [1,...] | Max size of each batch.                                                                   |
+| inactive_timeout                 | integer | optional    | 3                              | [1,...] | Maximum age in seconds when the buffer will be flushed if inactive.                       |
+| buffer_duration                  | integer | optional    | 60                             | [1,...] | Maximum age in seconds of the oldest entry in a batch before the batch must be processed. |
+| max_retry_count                  | integer | optional    | 0                              | [0,...] | Maximum number of retries before removing from the processing pipe line.                  |
+| retry_delay                      | integer | optional    | 1                              | [0,...] | Number of seconds the process execution should be delayed if the execution fails.         |
 
 ## How To Enable And Disable
 
@@ -96,8 +104,26 @@ Step: update the attributes of the plugin
 ```shell
 curl http://127.0.0.1:9080/apisix/admin/plugin_metadata/error-log-logger -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
 {
-  "host": "127.0.0.1",
-  "port": 1999,
+  "tcp": {
+    "host": "127.0.0.1",
+    "port": 1999
+  },
+  "inactive_timeout": 1
+}'
+```
+
+## How to set the SkyWalking OAP server address
+
+Step: update the attributes of the plugin
+
+```shell
+curl http://127.0.0.1:9080/apisix/admin/plugin_metadata/error-log-logger -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
+{
+  "type": "SKYWALKING",
+  "skywalking": {
+    "host": "127.0.0.1",
+    "port": 1999
+  },
   "inactive_timeout": 1
 }'
 ```