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authentication-configmap-creating-from-files.adoc

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Creating a ConfigMap from a file

You can create a config map from a file.

Procedure

The following example procedure outlines how to create a config map from a file.

Note

If you create a config map from a file, you can include files containing non-UTF8 data that are placed in this field without corrupting the non-UTF8 data. {product-title} detects binary files and transparently encodes the file as MIME. On the server, the MIME payload is decoded and stored without corrupting the data.

You can pass the --from-file option multiple times to the CLI. The following example yields equivalent results to the creating from directories example.

  1. Create a ConfigMap specifying a specific file:

    $ oc create configmap game-config-2 \
    --from-file=example-files/game.properties \
    --from-file=example-files/ui.properties

  2. Verify the results:

    $ oc get configmaps game-config-2 -o yaml
    Example output
    apiVersion: v1
data:
  game.properties: |-
    enemies=aliens
    lives=3
    enemies.cheat=true
    enemies.cheat.level=noGoodRotten
    secret.code.passphrase=UUDDLRLRBABAS
    secret.code.allowed=true
    secret.code.lives=30
  ui.properties: |
    color.good=purple
    color.bad=yellow
    allow.textmode=true
    how.nice.to.look=fairlyNice
kind: ConfigMap
metadata:
  creationTimestamp: 2016-02-18T18:52:05Z
  name: game-config-2
  namespace: default
  resourceVersion: "516"
  selflink: /api/v1/namespaces/default/configmaps/game-config-2
  uid: b4952dc3-d670-11e5-8cd0-68f728db1985

You can specify the key to set in a ConfigMap for content imported from a file. This can be set by passing a key=value expression to the --from-file option. For example:

  1. Create a ConfigMap specifying a key-value pair:

    $ oc create configmap game-config-3 \
    --from-file=game-special-key=example-files/game.properties

  2. Verify the results:

    $ oc get configmaps game-config-3 -o yaml
    Example output
    apiVersion: v1
data:
  game-special-key: |- (1)
    enemies=aliens
    lives=3
    enemies.cheat=true
    enemies.cheat.level=noGoodRotten
    secret.code.passphrase=UUDDLRLRBABAS
    secret.code.allowed=true
    secret.code.lives=30
kind: ConfigMap
metadata:
  creationTimestamp: 2016-02-18T18:54:22Z
  name: game-config-3
  namespace: default
  resourceVersion: "530"
  selflink: /api/v1/namespaces/default/configmaps/game-config-3
  uid: 05f8da22-d671-11e5-8cd0-68f728db1985

    1. This is the key that you set in the preceding step.