modules.kubernetes / states.kubernetes - Support for keys in configmap_present

[jryberg]

Description of Issue/Question

Hi,

This is a feature request for Kubernetes

When using configmap in Kubernetes and you want to be able to mount a specific file from a config map you need to use the key for the specific config value, not only the name.

It's not possible today to add a key when you create a configmap using Salt.

This is the command I want to run using salt

kubectl create configmap my-config --from-file=key1=/path/to/bar/file1.txt

It's the --from-file=key1= that is missing right now.

Help section for create configmap as reference

root@bofh:~# kubectl help create configmap
Create a configmap based on a file, directory, or specified literal value.

A single configmap may package one or more key/value pairs.

When creating a configmap based on a file, the key will default to the basename of the file, and the value will default
to the file content.  If the basename is an invalid key, you may specify an alternate key.

When creating a configmap based on a directory, each file whose basename is a valid key in the directory will be
packaged into the configmap.  Any directory entries except regular files are ignored (e.g. subdirectories, symlinks,
devices, pipes, etc).

Aliases:
configmap, cm

Examples:
  # Create a new configmap named my-config based on folder bar
  kubectl create configmap my-config --from-file=path/to/bar

  # Create a new configmap named my-config with specified keys instead of file basenames on disk
  kubectl create configmap my-config --from-file=key1=/path/to/bar/file1.txt --from-file=key2=/path/to/bar/file2.txt

  # Create a new configmap named my-config with key1=config1 and key2=config2
  kubectl create configmap my-config --from-literal=key1=config1 --from-literal=key2=config2

  # Create a new configmap named my-config from the key=value pairs in the file
  kubectl create configmap my-config --from-file=path/to/bar

  # Create a new configmap named my-config from an env file
  kubectl create configmap my-config --from-env-file=path/to/bar.env

Options:
      --allow-missing-template-keys=true: If true, ignore any errors in templates when a field or map key is missing in
the template. Only applies to golang and jsonpath output formats.
      --append-hash=false: Append a hash of the configmap to its name.
      --dry-run=false: If true, only print the object that would be sent, without sending it.
      --from-env-file='': Specify the path to a file to read lines of key=val pairs to create a configmap (i.e. a Docker
.env file).
      --from-file=[]: Key file can be specified using its file path, in which case file basename will be used as
configmap key, or optionally with a key and file path, in which case the given key will be used.  Specifying a directory
will iterate each named file in the directory whose basename is a valid configmap key.
      --from-literal=[]: Specify a key and literal value to insert in configmap (i.e. mykey=somevalue)
      --generator='configmap/v1': The name of the API generator to use.
      --no-headers=false: When using the default or custom-column output format, don't print headers (default print
headers).
      --openapi-validation=true: If true, use openapi rather than swagger for validation.
  -o, --output='': Output format. One of:
json|yaml|wide|name|custom-columns=...|custom-columns-file=...|go-template=...|go-template-file=...|jsonpath=...|jsonpath-file=...
See custom columns [http://kubernetes.io/docs/user-guide/kubectl-overview/#custom-columns], golang template
[http://golang.org/pkg/text/template/#pkg-overview] and jsonpath template
[http://kubernetes.io/docs/user-guide/jsonpath].
      --save-config=false: If true, the configuration of current object will be saved in its annotation. Otherwise, the
annotation will be unchanged. This flag is useful when you want to perform kubectl apply on this object in the future.
      --schema-cache-dir='~/.kube/schema': If non-empty, load/store cached API schemas in this directory, default is
'$HOME/.kube/schema'
  -a, --show-all=false: When printing, show all resources (default hide terminated pods.)
      --show-labels=false: When printing, show all labels as the last column (default hide labels column)
      --sort-by='': If non-empty, sort list types using this field specification.  The field specification is expressed
as a JSONPath expression (e.g. '{.metadata.name}'). The field in the API resource specified by this JSONPath expression
must be an integer or a string.
      --template='': Template string or path to template file to use when -o=go-template, -o=go-template-file. The
template format is golang templates [http://golang.org/pkg/text/template/#pkg-overview].
      --validate=true: If true, use a schema to validate the input before sending it

Usage:
  kubectl create configmap NAME [--from-file=[key=]source] [--from-literal=key1=value1] [--dry-run] [options]

Use "kubectl options" for a list of global command-line options (applies to all commands).

[gtmanfred]

That would be great to be able to do.

If you had time to implement it, we would greatly appreciate a PR.

Thanks, Daniel

[jryberg]

@gtmanfred I would love to, but I don't have enough Python knowledge. I'm working to get there but it's a long way for me right now.

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