feat(apisix): add Cloudron package

- Implements Apache APISIX packaging for Cloudron platform.
- Includes Dockerfile, CloudronManifest.json, and start.sh.
- Configured to use Cloudron's etcd addon.

🤖 Generated with Gemini CLI
Co-Authored-By: Gemini <noreply@google.com>

CloudronPackages/APISIX/apisix-source/apisix/plugins/syslog/init.lua

@@ -0,0 +1,112 @@
+--
+-- Licensed to the Apache Software Foundation (ASF) under one or more
+-- contributor license agreements.  See the NOTICE file distributed with
+-- this work for additional information regarding copyright ownership.
+-- The ASF licenses this file to You 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.
+--
+
+local core = require("apisix.core")
+local bp_manager_mod = require("apisix.utils.batch-processor-manager")
+local logger_socket = require("resty.logger.socket")
+local rfc5424 = require("apisix.utils.rfc5424")
+local ipairs = ipairs
+local table_insert = core.table.insert
+local table_concat = core.table.concat
+
+local batch_processor_manager = bp_manager_mod.new("sys logger")
+
+local lrucache = core.lrucache.new({
+    ttl = 300, count = 512, serial_creating = true,
+})
+
+local _M = {}
+
+function _M.flush_syslog(logger)
+    local ok, err = logger:flush(logger)
+    if not ok then
+        core.log.error("failed to flush message:", err)
+    end
+
+    return ok
+end
+
+
+local function send_syslog_data(conf, log_message, api_ctx)
+    local err_msg
+    local res = true
+
+    core.log.info("sending a batch logs to ", conf.host, ":", conf.port)
+
+    -- fetch it from lrucache
+    local logger, err = core.lrucache.plugin_ctx(
+        lrucache, api_ctx, nil, logger_socket.new, logger_socket, {
+            host = conf.host,
+            port = conf.port,
+            flush_limit = conf.flush_limit,
+            drop_limit = conf.drop_limit,
+            timeout = conf.timeout,
+            sock_type = conf.sock_type,
+            pool_size = conf.pool_size,
+            tls = conf.tls,
+        }
+    )
+
+    if not logger then
+        res = false
+        err_msg = "failed when initiating the sys logger processor".. err
+    end
+
+    -- reuse the logger object
+    local ok, err = logger:log(log_message)
+
+    if not ok then
+        res = false
+        err_msg = "failed to log message" .. err
+    end
+
+    return res, err_msg
+end
+
+
+-- called in log phase of APISIX
+function _M.push_entry(conf, ctx, entry)
+    local json_str, err = core.json.encode(entry)
+    if not json_str then
+        core.log.error('error occurred while encoding the data: ', err)
+        return
+    end
+
+    local rfc5424_data = rfc5424.encode("SYSLOG", "INFO", ctx.var.host,
+                                "apisix", ctx.var.pid, json_str)
+    core.log.info("collect_data:" .. rfc5424_data)
+    if batch_processor_manager:add_entry(conf, rfc5424_data) then
+        return
+    end
+
+    -- Generate a function to be executed by the batch processor
+    local cp_ctx = core.table.clone(ctx)
+    local func = function(entries)
+        local items = {}
+        for _, e in ipairs(entries) do
+            table_insert(items, e)
+            core.log.debug("buffered logs:", e)
+        end
+
+        return send_syslog_data(conf, table_concat(items), cp_ctx)
+    end
+
+    batch_processor_manager:add_entry_to_new_processor(conf, rfc5424_data, ctx, func)
+end
+
+
+return _M