Can not validate with go template in command arguments

[lotusirous]

The following is the command for check local registry port on docker daemon.

$ goss add command 'docker info --format "{{ .RegistryConfig.IndexConfigs}}" |grep 3232 > /dev/null'
Adding Command to './goss.yaml':

docker info --format "{{ .RegistryConfig.IndexConfigs}}" |grep 3232 > /dev/null:
  exit-status: 1
  stdout: []
  stderr: []
  timeout: 10000

goss creates goss.yaml

command:
  docker info --format "{{ .RegistryConfig.IndexConfigs}}" |grep 3232 > /dev/null:
    exit-status: 1
    stdout: []
    stderr: []
    timeout: 10000

Then goss v result as follows:

$ goss v
2019/02/22 03:05:46 template: test:2:42: executing "test" at <.RegistryConfig.Inde...>: can't evaluate field RegistryConfig in type *goss.TmplVars

[ryysud]

I also faced the same problem.

[elliotweiser]

Can confirm. Also applies to checking for IPs that listening ports bind to.

[elliotweiser]

In my case, goss render and goss validate yield:

executing "test" at <.Env.NGINX_BIND_IP>: can't evaluate field Env in type interface {}

[aelsabbahy]

Since the yaml file is parsed as a go-template, you would have to escape the curly braces:

• https://stackoverflow.com/a/17642427
• https://stackoverflow.com/a/38941123

Example:

command:
  echo "{{`{{`}}foo{{`}}`}}":
    exit-status: 0
    timeout: 10000

Or the whole line can be escaped for easier readability:

command:
  {{ `echo "{{foo}}"` }}:
    exit-status: 0
    timeout: 10000

or using double quotes.

command:
  {{"echo \"{{foo}}\""}}:
    exit-status: 0
    timeout: 10000

Any valid golang template escapes should work.

@elliotweiser can you post a snippet of the resource that was causing you issues?