131 lines
4.7 KiB
Ruby
131 lines
4.7 KiB
Ruby
# <<*>> -^v- SNOWARE APPLICATION
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# usage: Automatic operator implementation.
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# author: S.A.
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# time: 2026-06-07
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# Copyright (c) [2026] [S.A. SNOWARE-SCU]
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# [MineSentinel] is licensed under Mulan PubL v2.
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# You can use this software according to the terms and conditions of the Mulan PubL v2.
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# You may obtain a copy of Mulan PubL v2 at:
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# http://license.coscl.org.cn/MulanPubL-2.0
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# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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# EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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# MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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# See the Mulan PubL v2 for more details.
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# frozen_string_literal: true
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PERSISTENCE_PERIOD = 30 # Wait for systemctl to take the order.
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require 'logger'
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require_relative 'server_status_detector'
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class MethodExecutor
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public
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RST_COUNTS_LIMIT = 10
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@@rst_counter = 0
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# Initialize the standard log system.
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@@logger = Logger.new(STDOUT) # This script will be launched as a systemd server.
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STDOUT.sync = true
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STDERR.sync = true
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# Fetch the environmental variable and convert it into log level.
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@@logger.level = case ENV["LOG_LEVEL"] # @为单个实例（半生不熟的概念，貌似是在不同的空间独立创建），@@为共享同一个
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when nil # Default config.
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Logger::Severity::DEBUG
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when "debug"
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Logger::Severity::DEBUG
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when "info"
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Logger::Severity::INFO
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when "warn"
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Logger::Severity::WARN
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when "error"
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Logger::Severity::ERROR
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else
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raise ArgumentError
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end
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@@logger.progname = "MineSentinel"
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# @param level [String] "info" | "warn" | "error" | "debug"
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# @param module_name [String]
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# @param message [String]
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# @return [void]
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def self.record(level, module_name, message)
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case level
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when "info"
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@@logger.info("#{module_name}: #{message}")
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when "warn"
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@@logger.warn("#{module_name}: #{message}")
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when "error"
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@@logger.error("#{module_name}: #{message}")
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when "debug"
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@@logger.debug("#{module_name}: #{message}")
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else
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raise ArgumentError
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end
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end
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# @return [void]
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def self.reset_minecraft_server
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self.record("info", "reset", "Attempt ##{@@rst_counter + 1} to reset Minecraft server.")
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if @@rst_counter >= RST_COUNTS_LIMIT
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self.record("error", "reset",
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"Tried #{RST_COUNTS_LIMIT} times and failed, now I'll idle until server is manually restarted.")
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while true
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sleep 10
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SystemdNotifier.notify("WATCHDOG=1") if defined?(SystemdNotifier)
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if ServerStatusDetector::MinecraftServer.self_diag[:type] == true
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self.record("info", "reset", "Server recovered! Resuming normal monitoring.")
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@@rst_counter = 0
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return
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end
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end
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end
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@@rst_counter += 1
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unless Process.euid == 0
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self.record("error", "reset", "Permission denied: root required to manage systemd services.")
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raise Errno::EPERM
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end
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self.record("info", "reset", "Spawning 'systemctl restart minecraft' (PID will be captured)...")
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pid = spawn "systemctl restart minecraft"
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self.record("debug", "reset", "systemctl restart spawned with PID #{pid}.")
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tick_beg = Time.now
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while true
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sleep 0.5
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SystemdNotifier.notify("WATCHDOG=1")
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proc_status = Process.waitpid2(pid, Process::WNOHANG)
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if proc_status # 子进程已退出，返回 [pid, status]
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_, status = proc_status
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elapsed = (Time.now - tick_beg).round(2)
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if status.success?
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self.record("info", "reset", "'systemctl restart' succeeded in #{elapsed}s.")
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@@rst_counter = 0 # 成功时重置计数器
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break
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else
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self.record("error", "reset", "'systemctl restart' failed with exitcode #{status.exitstatus} after #{elapsed}s.")
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break
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end
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else # 子进程仍在运行 (WNOHANG 返回 nil)
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if Time.now - tick_beg > PERSISTENCE_PERIOD then
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self.record("warn", "reset",
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"'systemctl restart' timed out after #{PERSISTENCE_PERIOD}s. Force-killing PID #{pid}...")
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system "kill -9 #{pid}"
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self.record("warn", "reset", "Running 'systemctl kill minecraft' (last resort)...")
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system "systemctl kill minecraft" # 没招了，毁灭吧
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sleep 0.5
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self.record("info", "reset", "Running 'systemctl start minecraft' (rebirth)...")
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system "systemctl start minecraft" # 重生
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self.record("info", "reset", "Force-reset sequence completed.")
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break
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end
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end
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end
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end
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end
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