TypeError: no implicit conversion of nil into String

[somethingnew2-0]

When trying to run a very simple container I run into an issue within the docker cookbook. Am I missing anything with my docker_container 'busybox' declaration or is this a bug in the library?

Cookbook Trace:

/var/lib/aws/opsworks/cache/cookbooks/docker/providers/container.rb:138:in `start_with?'
/var/lib/aws/opsworks/cache/cookbooks/docker/providers/container.rb:138:in `container_id_matches?'
/var/lib/aws/opsworks/cache/cookbooks/docker/providers/container.rb:7:in `block in load_current_resource'
/var/lib/aws/opsworks/cache/cookbooks/docker/providers/container.rb:6:in `each'
/var/lib/aws/opsworks/cache/cookbooks/docker/providers/container.rb:6:in `load_current_resource'

Resource Declaration:

In /var/lib/aws/opsworks/cache/cookbooks/chef/recipes/run_containers.rb

2: docker_container 'busybox' do
3:   command 'sleep 10'
4:   detach true
5: end
6: 

Compiled Resource:

Declared in /var/lib/aws/opsworks/cache/cookbooks/chef/recipes/run_containers.rb:2:in `from_file'

docker_container("busybox") do
action :run
retries 0
retry_delay 2
cookbook_name "chef"
recipe_name "run_containers"
command "sleep 10"
detach true
cmd_timeout 60
end

[2014-04-29T04:54:34+00:00] INFO: Running queued delayed notifications before re-raising exception
[2014-04-29T04:54:34+00:00] ERROR: Running exception handlers
[2014-04-29T04:54:34+00:00] ERROR: Exception handlers complete
[2014-04-29T04:54:34+00:00] FATAL: Stacktrace dumped to /var/lib/aws/opsworks/cache/chef-stacktrace.out
[2014-04-29T04:54:34+00:00] ERROR: docker_container[busybox] (chef::run_containers line 2) had an error: TypeError: no implicit conversion of nil into String
[2014-04-29T04:54:34+00:00] FATAL: Chef::Exceptions::ChildConvergeError: Chef run process exited unsuccessfully (exit code 1)

[bflad]

Interesting. We can help it from completely bombing out with adding a return false if id.nil? check to the beginning of the container_id_matches? method, but I'm curious why you're getting a nil container ID. Could you get me the output of docker ps -a -notrunc? It may be printed out a few lines above this error.

[somethingnew2-0]

I think docker ps -a -notrunc returned an empty output even though I had pulled the image
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

[bflad]

I've merged in #157 which may resolve this issue and am going to preemptively close #139, #153, and #154 even though they may not be fully resolved yet. I'd prefer if someone created separate new single issues to track if you are:

• no longer able matching images/containers in your use cases
• still having issues with nil for existing containers

Thanks so much for your cooperation and patience.