Bug 1452939 - change Logging & Metrics imagePullPolicy

- all images logging and metrics change their default imagePullPolicy
  from Always to IfNotPresent

1 files changed, 75 insertions, 0 deletions

diff --git a/roles/openshift_logging/README.md b/roles/openshift_logging/README.md
index 280d7d24c..0ea34faf2 100644
--- a/roles/openshift_logging/README.md
+++ b/roles/openshift_logging/README.md
@@ -225,3 +225,78 @@ The corresponding openshift\_logging\_mux\_* parameters are below.
 - `openshift_logging_mux_remote_syslog_tag_key`: If string specified, use this field from the record to set the key field on the syslog message
 - `openshift_logging_mux_remote_syslog_use_record`: Set `true` to use the severity and facility from the record, defaults to `false`
 - `openshift_logging_mux_remote_syslog_payload_key`: If string is specified, use this field from the record as the payload on the syslog message
+
+Image update procedure
+----------------------
+An upgrade of the logging stack from older version to newer is an automated process and should be performed by calling appropriate ansible playbook and setting required ansible variables in your inventory as documented in https://docs.openshift.org/.
+
+Following text describes manual update of the logging images without version upgrade. To determine the current version of images being used you can.
+```
+oc describe pod | grep 'Image ID:'
+```
+This will get the repo digest that can later be compared to the inspected image details.
+
+A way to determine when was your image last updated:
+```
+$ docker images
+REPOSITORY                              TAG     IMAGE ID       CREATED             SIZE
+<registry>/openshift3/logging-fluentd   v3.7    ff2e249fc45a   About an hour ago   235.2 MB
+
+$ docker inspect ff2e249fc45a
+[
+    {
+        . . .
+        "RepoDigests": [
+            "<registry>/openshift3/logging-fluentd@sha256:4346f0aa9694f32735115705ad324803b1a6ff08343c3288f7a62c3a5cb70495"
+        ],
+        . . .
+        "Config": {
+            . . .
+            "Labels": {
+                . . .
+                "build-date": "2017-10-12T14:38:22.414827",
+                . . . 
+                "release": "0.143.3.0",
+                . . .
+                "url": "https://access.redhat.com/containers/#/registry.access.redhat.com/openshift3/logging-fluentd/images/v3.7.0-0.143.3.0",
+                . . .
+                "version": "v3.7.0"
+            }
+        },
+        . . .
+```
+
+Pull a new image to see if registry has any newer images with the same tag:
+```
+$ docker pull <registry>/openshift3/logging-fluentd:v3.7
+```
+
+If there was an update, you need to run the `docker pull` on each node.
+
+It is recommended that you now rerun the `openshift_logging` playbook to ensure that any necessary config changes are also picked up.
+ 
+To manually redeploy your pod you can do the following:
+- for a DC you can do:
+```
+oc rollout latest <dc_name>
+```
+     
+- for a RC you can scale down and scale back up
+```
+oc scale --replicas=0 <rc_name>
+
+... wait for scale down
+
+oc scale --replicas=<original_replica_count> <rc_name>
+```
+
+- for a DS you can delete the pod or unlabel and relabel your node
+```
+oc delete pod --selector=<ds_selector>
+```
+
+Changelog
+---------
+
+Tue Oct 10, 2017
+- Default imagePullPolicy changed from Always to IfNotPresent