logging: introducing event router

- eventrouter has its own role 'openshift_logging_eventrouter' written as
  a template
- 'openshift_logging_install_eventrouter' controls whether it gets included
  in the playbook or not
- deployed by default to 'default' namespace

3 files changed, 22 insertions, 2 deletions

diff --git a/roles/openshift_logging/README.md b/roles/openshift_logging/README.md
index f283261c4..da5631d1e 100644
--- a/roles/openshift_logging/README.md
+++ b/roles/openshift_logging/README.md
@@ -12,13 +12,13 @@ generation for Elasticsearch (it uses JKS) as well as openssl to sign certificat
 As part of the installation, it is recommended that you add the Fluentd node selector label
 to the list of persisted [node labels](https://docs.openshift.org/latest/install_config/install/advanced_install.html#configuring-node-host-labels).
 
-###Required vars:
+### Required vars:
 
 - `openshift_logging_install_logging`: When `True` the `openshift_logging` role will install Aggregated Logging.
 
 When `openshift_logging_install_logging` is set to `False` the `openshift_logging` role will uninstall Aggregated Logging.
 
-###Optional vars:
+### Optional vars:
 - `openshift_logging_purge_logging`: When `openshift_logging_install_logging` is set to 'False' to trigger uninstalation and `openshift_logging_purge_logging` is set to 'True', it will completely and irreversibly remove all logging persistent data including PVC. Defaults to 'False'.
 - `openshift_logging_image_prefix`: The prefix for the logging images to use. Defaults to 'docker.io/openshift/origin-'.
 - `openshift_logging_curator_image_prefix`: Setting the image prefix for Curator image. Defaults to `openshift_logging_image_prefix`.
@@ -91,6 +91,12 @@ When `openshift_logging_install_logging` is set to `False` the `openshift_loggin
 - `openshift_logging_es_number_of_shards`: The number of primary shards for every new index created in ES. Defaults to '1'.
 - `openshift_logging_es_number_of_replicas`: The number of replica shards per primary shard for every new index. Defaults to '0'.
 
+- `openshift_logging_install_eventrouter`: Coupled with `openshift_logging_install_logging`. When both are 'True', eventrouter will be installed. When both are 'False', eventrouter will be uninstalled.
+Other combinations will keep the eventrouter untouched.
+
+Detailed eventrouter configuration can be found in
+- `roles/openshift_logging_eventrouter/README.md`
+
 When `openshift_logging_use_ops` is `True`, there are some additional vars. These work the
 same as above for their non-ops counterparts, but apply to the OPS cluster instance:
 - `openshift_logging_es_ops_host`: logging-es-ops
diff --git a/roles/openshift_logging/tasks/delete_logging.yaml b/roles/openshift_logging/tasks/delete_logging.yaml
index 45298e345..3040d15ca 100644
--- a/roles/openshift_logging/tasks/delete_logging.yaml
+++ b/roles/openshift_logging/tasks/delete_logging.yaml
@@ -105,3 +105,9 @@
     - logging-elasticsearch
     - logging-fluentd
     - logging-mux
+
+## EventRouter
+- include_role:
+    name: openshift_logging_eventrouter
+  when:
+    not openshift_logging_install_eventrouter | default(false) | bool
diff --git a/roles/openshift_logging/tasks/install_logging.yaml b/roles/openshift_logging/tasks/install_logging.yaml
index de5e25061..2695ef030 100644
--- a/roles/openshift_logging/tasks/install_logging.yaml
+++ b/roles/openshift_logging/tasks/install_logging.yaml
@@ -270,4 +270,12 @@
     openshift_logging_fluentd_master_url: "{{ openshift_logging_master_url }}"
     openshift_logging_fluentd_namespace: "{{ openshift_logging_namespace }}"
 
+
+## EventRouter
+- include_role:
+    name: openshift_logging_eventrouter
+  when:
+    openshift_logging_install_eventrouter | default(false) | bool
+
+
 - include: update_master_config.yaml