fix fabric8io#235. Point README to code for regex (fabric8io#274)

README.md

@@ -39,15 +39,15 @@ Configuration options for fluent.conf are:
 * `client_key` - path to a client key file to authenticate to the API server
 * `bearer_token_file` - path to a file containing the bearer token to use for authentication
 * `tag_to_kubernetes_name_regexp` - the regular expression used to extract kubernetes metadata (pod name, container name, namespace) from the current fluentd tag.
-This must used named capture groups for `container_name`, `pod_name` & `namespace` (default: `\.(?<pod_name>[^\._]+)_(?<namespace>[^_]+)_(?<container_name>.+)-(?<docker_id>[a-z0-9]{64})\.log$</pod>)`)
+This must used named capture groups for `container_name`, `pod_name` & `namespace` default: See [code](https://github.com/fabric8io/fluent-plugin-kubernetes_metadata_filter/blob/master/lib/fluent/plugin/filter_kubernetes_metadata.rb#L52)
 * `cache_size` - size of the cache of Kubernetes metadata to reduce requests to the API server (default: `1000`)
 * `cache_ttl` - TTL in seconds of each cached element. Set to negative value to disable TTL eviction (default: `3600` - 1 hour)
 * `watch` - set up a watch on pods on the API server for updates to metadata (default: `true`)
 * `de_dot` - replace dots in labels and annotations with configured `de_dot_separator`, required for ElasticSearch 2.x compatibility (default: `true`)
 * `de_dot_separator` - separator to use if `de_dot` is enabled (default: `_`)
 * *DEPRECATED* `use_journal` - If false, messages are expected to be formatted and tagged as if read by the fluentd in\_tail plugin with wildcard filename.  If true, messages are expected to be formatted as if read from the systemd journal.  The `MESSAGE` field has the full message.  The `CONTAINER_NAME` field has the encoded k8s metadata (see below).  The `CONTAINER_ID_FULL` field has the full container uuid.  This requires docker to use the `--log-driver=journald` log driver.  If unset (the default), the plugin will use the `CONTAINER_NAME` and `CONTAINER_ID_FULL` fields
 if available, otherwise, will use the tag in the `tag_to_kubernetes_name_regexp` format.
-* `container_name_to_kubernetes_regexp` - The regular expression used to extract the k8s metadata encoded in the journal `CONTAINER_NAME` field (default: `'^(?<name_prefix>[^_]+)_(?<container_name>[^\._]+)(\.(?<container_hash>[^_]+))?_(?<pod_name>[^_]+)_(?<namespace>[^_]+)_[^_]+_[^_]+$'`
+* `container_name_to_kubernetes_regexp` - The regular expression used to extract the k8s metadata encoded in the journal `CONTAINER_NAME` field default: See [code](https://github.com/fabric8io/fluent-plugin-kubernetes_metadata_filter/blob/master/lib/fluent/plugin/filter_kubernetes_metadata.rb#L68)
   * This corresponds to the definition [in the source](https://github.com/kubernetes/kubernetes/blob/release-1.6/pkg/kubelet/dockertools/docker.go#L317)
 * `annotation_match` - Array of regular expressions matching annotation field names. Matched annotations are added to a log record.
 * `allow_orphans` - Modify the namespace and namespace id to the values of `orphaned_namespace_name` and `orphaned_namespace_id`