The configuration is invalid and could not be loaded.

[skamelone]

Config.yaml is not valid

Oathkeeper version: v0.19.1

Here's my ConfigMap used in my oathKeeper Deployment object:

apiVersion: v1
kind: ConfigMap
metadata:
  name: oathkeeper-config
data:
  config.yaml: |
    serve:
      proxy:
        port: 4455 # run the proxy at port 4455
      api:
        port: 4456 # run the api at port 4456

    access_rules:
      repositories:
        - file:///rules.json

    mutators:
      header:
        enabled: true
      noop:
        enabled: true
      id_token:
        enabled: true
        config:
          issuer_url: http://localhost:4455/
          jwks_url: file:///jwks.json

    authorizers:
      allow:
        enabled: true
      deny:
        enabled: true

    authenticators:
      anonymous:
        enabled: true
        subject: guest
  jwks.json: |
    {
      "keys": [
        {
			...
        }
      ]
    }
  dev-rules.json: |
    [
		...
    ]
  staging-rules.json: |
    [
		...
    ]

apiVersion: apps/v1
kind: Deployment
metadata:
    name: oathkeeper
spec:
    replicas: 3
    selector:
        matchLabels:
            component: oathkeeper
    template:
        metadata:
            labels:
                component: oathkeeper
        spec:
            containers:
                - name: oathkeeper
                  image: oryd/oathkeeper:v0.19.1
                  command: ["oathkeeper", "--config", "/config.yaml", "serve"]
                  imagePullPolicy: Always
                  ports:
                    - containerPort: 4455
                      name: oathproxy
                    - containerPort: 4456
                      name: oathapi
                  resources:
                    limits:
                      cpu: "0.1"
                      memory: 100Mi
                  volumeMounts:
                    - name: oathkeeper-config
                      mountPath: /config.yaml
                      subPath: config.yaml
                    - name: oathkeeper-config
                      mountPath: /jwks.json
                      subPath: jwks.json
                    - name: oathkeeper-config
                      mountPath: /rules.json
                      subPath: dev-rules.json
            volumes:
              - name: oathkeeper-config
                configMap:
                    name: oathkeeper-config

When I install oathkeeper, here are the logs I get from crashing oathkeeper pods:

time="2019-10-10T18:50:36Z" level=info msg="Config file loaded successfully." path=/config.yaml
time="2019-10-10T18:50:36Z" level=fatal msg="The configuration is invalid and could not be loaded." error="must validate at least one schema (anyOf)" validation_error[0]="mutators.header: Must validate at least one schema (anyOf)" validation_error[1]="mutators.header.config: config is required"

It's probably my mistake but I can't figure out what's wrong with my conf. I haven't found any solution in the documentation as well.

[kubadz]

You have to add config to header mutator with a fallback header to oathkeeper-config.
for example:

    mutators:
      header:
        enabled: true
        config:
          headers:
            foo: bar

In the UPGRADE.md you can read:

The global config will always be used as a fallback when no access rule specific configuration is set.

[aeneasr]

You can find an example here: https://www.ory.sh/docs/oathkeeper/configuration

Make sure to use "config" keys as @kubadz pointed out.