让karaf随ubuntu开机启动

最近帮助一个客户部署了一个Apache Servicemix环境。
客户提出，能不能让Servicemix开机启动。这样，如果机器出现了什么问题，重启一下就好了。不需要让运维人员知道如何操作Servicemix。
当然可以。需求合理，没有拒绝的理由。

但是实际操作的时候，试过在init.d目录下加脚本，在rc.local中加命令行。在网上也找了好几个方法，均告失败，也没看到任何错误。原以为设置个开机启动，和玩似的，结果被机器玩了。

不过，功夫不负有心人，终于还是找到了办法。

因为servicemix其实就是一个开源大礼包，把几个apache的开源软件组装在一起拼凑而成。运行时环境是Karaf。所以，第一眼在karaf下看到官方的开机启动方案时，眼前一亮。觉得这个方法应该可行。结果一试，果然可以。

操作步骤也非常简单，摘抄如下（不过，还是去官网看一下更靠谱，网址：https://karaf.apache.org/manu...）：

Installation
Apache Karaf Service Wrapper is an optional feature. You have to install the "Service Wrapper" installer first.

In the console:

karaf@root()> feature:install service-wrapper
Now,you have the wrapper:install command,to "register" Apache Karaf as service/daemon on your system:

karaf@root()> wrapper:install --help
DESCRIPTION
        wrapper:install

        Install the container as a system service in the OS.

Syntax
        wrapper:install [options]

OPTIONS
        -d,--display
                The display name of the service.
                (defaults to karaf)
        --help
                Display this help message
        -s,--start-type
                Mode in which the service is installed. AUTO_START or DEMAND_START (Default: AUTO_START)
                (defaults to AUTO_START)
        -n,--name
                The service name that will be used when installing the service. (Default: karaf)
                (defaults to karaf)
        -D,--description
                The description of the service.
                (defaults to )
The wrapper:install command detects the running Operating Service and provide the service/daemon ready to be integrated in your system.

For instance,on a Ubuntu/Debian Linux system:

karaf@root()> wrapper:install
Creating file: /opt/apache-karaf-4.0.0/bin/karaf-wrapper
Creating file: /opt/apache-karaf-4.0.0/bin/karaf-service
Creating file: /opt/apache-karaf-4.0.0/etc/karaf-wrapper.conf
Creating missing directory: /opt/apache-karaf-4.0.0/lib/wrapper
Creating file: /opt/apache-karaf-4.0.0/lib/wrapper/libwrapper.so
Creating file: /opt/apache-karaf-4.0.0/lib/wrapper/karaf-wrapper.jar
Creating file: /opt/apache-karaf-4.0.0/lib/wrapper/karaf-wrapper-main.jar

Setup complete.  You may wish to tweak the JVM properties in the wrapper configuration file:
        /opt/apache-karaf-4.0.0/etc/karaf-wrapper.conf
before installing and starting the service.


Ubuntu/Debian Linux system detected:
  To install the service:
    $ ln -s /opt/apache-karaf-4.0.0/bin/karaf-service /etc/init.d/

  To start the service when the machine is rebooted:
    $ update-rc.d karaf-service defaults

  To disable starting the service when the machine is rebooted:
    $ update-rc.d -f karaf-service remove

  To start the service:
    $ /etc/init.d/karaf-service start

  To stop the service:
    $ /etc/init.d/karaf-service stop

  To uninstall the service :
    $ rm /etc/init.d/karaf-service

让karaf随ubuntu开机启动

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