用户数据脚本失败不给理由 [英] user data scripts fails without giving reason

问题描述

我开始使用Web控制台亚马逊Linux实例（AMI-fb8e9292），粘贴数据到用户数据中在启动时运行的脚本。如果我使用例如亚马逊给启动Web服务器，它的工作原理。但是，当我跑我自己的脚本（也有＃！/斌/ bash的脚本），它不会运行。

I am starting a Amazon Linux instance (ami-fb8e9292) using the web console, pasting data into the user data box to run a script upon startup. If I use the example given by amazon to start a web server, it works. But when I run my own script (also a #!/bin/bash script), it does not get run.

如果我看在无功/日志/云init.log ，它提供了有关该主题的有用信息：

If I look in var/log/cloud-init.log, it gives no useful information on the topic:

May 22 21:06:12 cloud-init[1286]: util.py[DEBUG]: Running command ['/var/lib/cloud/instance/scripts/part-001'] with allowed return codes [0] (shell=True, capture=False)
May 22 21:06:16 cloud-init[1286]: util.py[WARNING]: Failed running /var/lib/cloud/instance/scripts/part-001 [2]
May 22 21:06:16 cloud-init[1286]: util.py[DEBUG]: Failed running /var/lib/cloud/instance/scripts/part-001 [2]
Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/cloudinit/util.py", line 637, in runparts
    subp([exe_path], capture=False, shell=True)
  File "/usr/lib/python2.6/site-packages/cloudinit/util.py", line 1528, in subp
    cmd=args)
ProcessExecutionError: Unexpected error while running command.
Command: ['/var/lib/cloud/instance/scripts/part-001']
Exit code: 2
Reason: -
Stdout: ''
Stderr: ''

如果我SSH连接实例和须藤苏，然后直接执行shell脚本：

If I ssh into the instance and sudo su and execute the shell script directly:

/var/lib/cloud/instance/scripts/part-001

那么它运行良好。此外，它的工作原理，如果我模仿的方式云初始化运行它：

then it runs fine. Also, it works if I emulate the way cloud-init runs it:

python
>>> import cloudinit.util
>>> cloudinit.util.runparts("/var/lib/cloud/instance/scripts/")

无论使用这些方法，如果我故意将错误引入脚本，然后它产生的错误信息。如何调试选择性缺乏有用的调试输出？

Using either of those methods, if I intentionally introduce errors into the script then it produces error messages. How can I debug the selective absence of useful debugging output?

推荐答案

我有一个类似的问题，我能得到周围。我意识到，环境变量EC2_HOME不会设置为sudo的。我在做我的configset了一堆东西，它使用AWS CLI并为这些工作，EC2_HOME需要设置。于是，我走进去，到处都是我的configset和userData删除sudo的。 早些时候，当我打这个问题，我的UserData看起来像：

I had a similar issue and I was able to get around it. I realized that the environment variables EC2_HOME would not be setup for the sudo. I was doing a bunch of stuff in my configset which uses aws cli and for these to work, the EC2_HOME needs to be setup. So, I went in and removed sudo everywhere in my configset and UserData. Earlier when I was hitting the issue, my UserData looked like:

"UserData"       : { "Fn::Base64" : { "Fn::Join" : ["", [
                                "#!/bin/bash\n",
                                "sudo yum update -y aws-cfn-bootstrap\n",

                                "# Install the files and packages and run the commands from the metadata\n",
                                "sudo /opt/aws/bin/cfn-init -v --access-key ", { "Ref" : "IAMUserAccessKey" }, " --secret-key ", { "Ref" : "SecretAccessKey" },  
                                "         --stack ", { "Ref" : "AWS::StackName" },
                                "         --resource NAT2 ",
                                "         --configsets config ",
                                "         --region ", { "Ref" : "AWS::Region" }, "\n"
                        ]]}}

我的更改后的UserData看起来像：

My UserData after the changes looked like:

"UserData"       : { "Fn::Base64" : { "Fn::Join" : ["", [
                                "#!/bin/bash -xe\n",
                                "yum update -y aws-cfn-bootstrap\n",

                                "# Install the files and packages and run the commands from the metadata\n",
                                "/opt/aws/bin/cfn-init -v --access-key ", { "Ref" : "IAMUserAccessKey" }, " --secret-key ", { "Ref" : "SecretAccessKey" },  
                                "         --stack ", { "Ref" : "AWS::StackName" },
                                "         --resource NAT2 ",
                                "         --configsets config ",
                                "         --region ", { "Ref" : "AWS::Region" }, "\n"
                        ]]}}

同样，我删除了所有的sudo的电话我是在做我的configsets

Similarly, I removed all the sudo calls I was doing in my configsets

这篇关于用户数据脚本失败不给理由的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！