Mark Berry June 13, 2014
Working on an AWS Elastic Beanstalk deployment, I’m using a .config file in my project’s .ebextensions folder to create and upload a file (see the Development Duide). The deployment fails with this message:
Error occurred during build: invalid literal for int() with base 8: ‘493’
I pulled a more complete error trace from /var/log/cfn-init.log:
[ERROR] Unhandled exception during build: invalid literal for int() with base 8: '493' Traceback (most recent call last): File "/opt/aws/bin/cfn-init", line 122, in <module> worklog.build(detail.metadata, configSets) File "/usr/lib/python2.6/site-packages/cfnbootstrap/construction.py", line 117, in build Contractor(metadata).build(configSets, self) File "/usr/lib/python2.6/site-packages/cfnbootstrap/construction.py", line 502, in build self.run_config(config, worklog) File "/usr/lib/python2.6/site-packages/cfnbootstrap/construction.py", line 511, in run_config CloudFormationCarpenter(config, self._auth_config).build(worklog) File "/usr/lib/python2.6/site-packages/cfnbootstrap/construction.py", line 238, in build changes['files'] = FileTool().apply(self._config.files, self._auth_config) File "/usr/lib/python2.6/site-packages/cfnbootstrap/file_tool.py", line 102, in apply file_is_link = "mode" in attribs and stat.S_ISLNK(int(attribs["mode"], 8)) ValueError: invalid literal for int() with base 8: '493'
The clue I needed was in the second-to-last line: it didn’t like the “mode” I specified for the file, apparently complaining that 493 is not a base-8 value (which is true: base 8 has digits 0 through 7). Here’s my .config file:
files: "/etc/my-file" : mode: 000755 owner: root group: root source: https://s3-us-west-2.amazonaws.com/mybucket/my-file Resources: AWSEBAutoScalingGroup: Metadata: AWS::CloudFormation::Authentication: S3Access: type: S3 roleName: aws-elasticbeanstalk-ec2-role buckets: mybucket
For some reason, it converted 000755 to 493 decimal (base 10), then it tried to interpret it as base 8.
Use Quotation Marks for Mode
The fix? Enclose the mode in quotation marks (which is in fact the way it is shown in the Development Guide examples):
files: "/etc/my-file" : mode: "000755" ...
With that change, the deployment worked and the file was successfully transferred from S3 to my EC2 instance.
P.S. Credit for the “Resources” section that allows downloading from secured S3 goes to the May 7, 2014 post by Joshua@AWS to this thread.