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如果使用Mongrel来部署Rails,就不可避免的使用
- mongrel_rails start -C mongrel.config
这里mongrel.config是mongrel的配置文件,可以为:
- —
- :config_script:
- :environment: development
- :pid_file: log/mongrel.pid
- :num_processors: 1024
- :docroot: public
- :timeout: 0
- :host: 0.0.0.0
- :mime_map:
- :port: 3000
- :daemon: false
- :cwd: /home/linux/projects/mongrel/testapp
- :includes:
- - mongrel
- :debug: false
- :log_file: log/mongrel.log
然后到app的根目录下运行上述的命令,恭喜您,你启动成功了.
但是有个问题,如果我不在app的根目录下运行呢?系统会给出我们信息:
- !!! Path to log file not valid: log/mongrel.log
- mongrel::start reported an error. Use mongrel_rails mongrel::start -h to get help.
第一眼看见这个错误,觉得非常简单,Mongrels的创始人给出的答案是将相对路径改为绝对路径.
也许上述的方法能解决问题,但是我相信仍然有一种情况:即使改为绝对路径,还是出现同样的错误.
如果发生上述的错误应该怎么办?
不幸的是,上述的问题我已经碰见过,很长时间不得要领.文档看破皮了,还是不能运行.不得已,打开mongrels的源代码看看.最后发现需要指定工作目录,因为工作目录是在log之前验证的.
摘录一段代码:
- module Mongrel
- class Start < GemPlugin::Plugin "/commands"
- include Mongrel::Command::Base
-
- def configure
- options [
- ["-e", "–environment ENV", "Rails environment to run as", :@environment, ENV[’RAILS_ENV’] || "development"],
- ["-d", "–daemonize", "Run daemonized in the background", :@daemon, false],
- [’-p’, ’–port PORT’, "Which port to bind to", :@port, 3000],
- [’-a’, ’–address ADDR’, "Address to bind to", :@address, "0.0.0.0"],
- [’-l’, ’–log FILE’, "Where to write log messages", :@log_file, "log/mongrel.log"],
- [’-P’, ’–pid FILE’, "Where to write the PID", :@pid_file, "log/mongrel.pid"],
- [’-n’, ’–num-procs INT’, "Number of processors active before clients denied", :@num_procs, 1024],
- [’-t’, ’–timeout TIME’, "Timeout all requests after 100th seconds time", :@timeout, 0],
- [’-m’, ’–mime PATH’, "A YAML file that lists additional MIME types", :@mime_map, nil],
- [’-c’, ’–chdir PATH’, "Change to dir before starting (will be expanded)", :@cwd, Dir.pwd],
- [’-r’, ’–root PATH’, "Set the document root (default ’public’)", :@docroot, "public"],
- [’-B’, ’–debug’, "Enable debugging mode", :@debug, false],
- [’-C’, ’–config PATH’, "Use a config file", :@config_file, nil],
- [’-S’, ’–script PATH’, "Load the given file as an extra config script", :@config_script, nil],
- [’-G’, ’–generate PATH’, "Generate a config file for use with -C", :@generate, nil],
- [”, ’–user USER’, "User to run as", :@user, nil],
- [”, ’–group GROUP’, "Group to run as", :@group, nil],
- [”, ’–prefix PATH’, "URL prefix for Rails app", :@prefix, nil]
- ]
- end
-
- def validate
- @cwd = File.expand_path(@cwd)
- valid_dir? @cwd, "Invalid path to change to during daemon mode: #@cwd"
-
-
- Dir.chdir(@cwd)
-
- valid?(@prefix[0].chr == "/" && @prefix[-1].chr != "/", "Prefix must begin with / and not end in /") if @prefix
- valid_dir? File.dirname(@log_file), "Path to log file not valid: #@log_file"
- valid_dir? File.dirname(@pid_file), "Path to pid file not valid: #@pid_file"
- valid_dir? @docroot, "Path to docroot not valid: #@docroot"
- valid_exists? @mime_map, "MIME mapping file does not exist: #@mime_map" if @mime_map
- valid_exists? @config_file, "Config file not there: #@config_file" if @config_file
- valid_dir? File.dirname(@generate), "Problem accessing directory to #@generate" if @generate
- valid_user? @user if @user
- valid_group? @group if @group
-
- return @valid
- end
-
- def run
-
- settings = { :host => @address, :port => @port, :cwd => @cwd,
- :log_file => @log_file, :pid_file => @pid_file, :environment => @environment,
- :docroot => @docroot, :mime_map => @mime_map, :daemon => @daemon,
- :debug => @debug, :includes => ["mongrel"], :config_script => @config_script,
- :num_processors => @num_procs, :timeout => @timeout,
- :user => @user, :group => @group, :prefix => @prefix, :config_file => @config_file
- }
-
-
-
- if @config_file
- settings.merge! YAML.load_file(@config_file)
- STDERR.puts "** Loading settings from #{@config_file} (they override command line)." unless settings[:daemon]
- end
-
- config = Mongrel::Rails::RailsConfigurator.new(settings) do
- if defaults[:daemon]
- if File.exist? defaults[:pid_file]
- log "!!! PID file #{defaults[:pid_file]} already exists. Mongrel could be running already. Check your #{defaults[:log_file]} for errors."
- log "!!! Exiting with error. You must stop mongrel and clear the .pid before I’ll attempt a start."
- exit 1
- end
-
- daemonize
- log "Daemonized, any open files are closed. Look at #{defaults[:pid_file]} and #{defaults[:log_file]} for info."
- log "Settings loaded from #{@config_file} (they override command line)." if @config_file
- end
看看上面的代码就非常清楚了.
那么如何解决,可以这样:
- mongrel_rails start -c youapp/path/to -C mongrel.config
本文转自 fsjoy1983 51CTO博客，原文链接：http://blog.51cto.com/fsjoy/68281，如需转载请自行联系原作者