Merge pull request #4973 from wozniakjan/logging_eventrouter

Automatic merge from submit-queue

logging: introducing event router

Initial concept integrating kubernetes events to EFK stack using [eventrouter](https://github.com/heptio/eventrouter)
- **eventrouter** is deployed to logging project, has a service account and its own role to read events
- **eventrouter** watches kubernetes events, marshalls them to JSON and outputs to its STDOUT
- **fluentd** picks them up and inserts to elastic search logging project index

Kubernetes events could be easily stored into different index. Among other ways, it could be achieved either by a fluentd filter plugin or custom eventrouter sink.

Pending actions:
- [x] - get our downstream and upstream images for eventrouter, don't use heptio's

cc: @josefkarasek , @jcantrill , @richm

1 files changed, 59 insertions, 0 deletions

diff --git a/roles/openshift_logging_eventrouter/tasks/install_eventrouter.yaml b/roles/openshift_logging_eventrouter/tasks/install_eventrouter.yaml
new file mode 100644
index 000000000..8df7435e2
--- /dev/null
+++ b/roles/openshift_logging_eventrouter/tasks/install_eventrouter.yaml
@@ -0,0 +1,59 @@
+---
+# initial checks
+- assert:
+    msg: Invalid sink type "{{openshift_logging_eventrouter_sink}}", only one of "{{__eventrouter_sinks}}" allowed
+    that: openshift_logging_eventrouter_sink in __eventrouter_sinks
+
+# allow passing in a tempdir
+- name: Create temp directory for doing work in
+  command: mktemp -d /tmp/openshift-logging-ansible-XXXXXX
+  register: mktemp
+  changed_when: False
+
+- set_fact:
+    tempdir: "{{ mktemp.stdout }}"
+
+- name: Create templates subdirectory
+  file:
+    state: directory
+    path: "{{ tempdir }}/templates"
+    mode: 0755
+  changed_when: False
+
+# create EventRouter deployment config
+- name: Generate EventRouter template
+  template:
+    src: eventrouter-template.j2
+    dest: "{{ tempdir }}/templates/eventrouter-template.yaml"
+  vars:
+    node_selector: "{{ openshift_logging_eventrouter_nodeselector | default({}) }}"
+
+- name: Create EventRouter template
+  oc_obj:
+    namespace: "{{ openshift_logging_eventrouter_namespace }}"
+    kind: template
+    name: eventrouter-template
+    state: present
+    files:
+    - "{{ tempdir }}/templates/eventrouter-template.yaml"
+
+- name: Process EventRouter template
+  oc_process:
+    state: present
+    template_name: eventrouter-template
+    namespace: "{{ openshift_logging_eventrouter_namespace }}"
+    params:
+      IMAGE: "{{openshift_logging_eventrouter_image_prefix}}logging-eventrouter:{{openshift_logging_eventrouter_image_version}}"
+      REPLICAS: "{{ openshift_logging_eventrouter_replicas }}"
+      CPU: "{{ openshift_logging_eventrouter_cpu_limit }}"
+      MEMORY: "{{ openshift_logging_eventrouter_memory_limit }}"
+      NAMESPACE: "{{ openshift_logging_eventrouter_namespace }}"
+      SINK: "{{ openshift_logging_eventrouter_sink }}"
+
+## Placeholder for migration when necessary ##
+
+- name: Delete temp directory
+  file:
+    name: "{{ tempdir }}"
+    state: absent
+  changed_when: False