92 lines
3.5 KiB
Ruby
92 lines
3.5 KiB
Ruby
require "log4r"
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module VagrantPlugins
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module ProviderVirtualBox
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module Action
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class SaneDefaults
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def initialize(app, env)
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@logger = Log4r::Logger.new("vagrant::action::vm::sanedefaults")
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@app = app
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end
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def call(env)
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# Set the env on an instance variable so we can access it in
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# helpers.
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@env = env
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# Enable the host IO cache on the sata controller. Note that
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# if this fails then its not a big deal, so we don't raise any
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# errors. The Host IO cache vastly improves disk IO performance
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# for VMs.
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command = [
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"storagectl", env[:machine].id,
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"--name", "SATA Controller",
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"--hostiocache", "on"
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]
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attempt_and_log(command, "Enabling the Host I/O cache on the SATA controller...")
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# Use rtcuseutc so that the VM sees UTC time.
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command = ["modifyvm", env[:machine].id, "--rtcuseutc", "on"]
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attempt_and_log(command, "Enabling rtcuseutc...")
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if env[:machine].provider_config.auto_nat_dns_proxy
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@logger.info("Automatically figuring out whether to enable/disable NAT DNS proxy...")
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# Enable/disable the NAT DNS proxy as necessary
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if enable_dns_proxy?
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command = ["modifyvm", env[:machine].id, "--natdnsproxy1", "on"]
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attempt_and_log(command, "Enable the NAT DNS proxy on adapter 1...")
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else
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command = [ "modifyvm", env[:machine].id, "--natdnsproxy1", "off" ]
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attempt_and_log(command, "Disable the NAT DNS proxy on adapter 1...")
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command = [ "modifyvm", env[:machine].id, "--natdnshostresolver1", "off" ]
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attempt_and_log(command, "Disable the NAT DNS resolver on adapter 1...")
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end
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else
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@logger.info("NOT trying to automatically manage NAT DNS proxy.")
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end
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@app.call(env)
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end
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protected
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# This is just a helper method that executes a single command, logs
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# the given string to the log, and also includes the exit status in
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# the log message.
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#
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# @param [Array] command Command to run
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# @param [String] log Log message to write.
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def attempt_and_log(command, log)
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result = @env[:machine].provider.driver.execute_command(command)
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@logger.info("#{log} (exit status = #{result.exit_code})")
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end
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# This uses some heuristics to determine if the NAT DNS proxy should
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# be enabled or disabled. See the comments within the function body
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# itself to see the checks it does.
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#
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# @return [Boolean]
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def enable_dns_proxy?
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begin
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contents = File.read("/etc/resolv.conf")
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if contents =~ /^nameserver 127\.0\.(0|1)\.1$/
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# The use of both natdnsproxy and natdnshostresolver break on
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# Ubuntu 12.04 and 12.10 that uses resolvconf with localhost. When used
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# VirtualBox will give the client dns server 10.0.2.3, while
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# not binding to that address itself. Therefore disable this
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# feature if host uses the resolvconf server 127.0.0.1 or
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# 127.0.1.1
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@logger.info("Disabling DNS proxy since resolv.conf contains 127.0.0.1 or 127.0.1.1")
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return false
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end
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rescue Errno::ENOENT; end
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return true
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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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