Use "requests" for CPU resources instead of limits

We now use a CPU request to ensure logging infrastructure pods are
not capped by default for CPU usage. It is still important to ensure
we have a minimum amount of CPU.

We keep the use of the variables *_cpu_limit so that the existing
behavior is maintained.

Note that we don't want to cap an infra pod's CPU usage by default,
since we want to be able to use the necessary resources to complete
it's tasks.

Bug 1501960 (https://bugzilla.redhat.com/show_bug.cgi?id=1501960)

1 files changed, 14 insertions, 5 deletions

diff --git a/roles/openshift_logging_mux/templates/mux.j2 b/roles/openshift_logging_mux/templates/mux.j2
index 4cc48139f..7e88e3964 100644
--- a/roles/openshift_logging_mux/templates/mux.j2
+++ b/roles/openshift_logging_mux/templates/mux.j2
@@ -37,17 +37,26 @@ spec:
       - name: "mux"
         image: {{image}}
         imagePullPolicy: Always
-{% if (mux_memory_limit is defined and mux_memory_limit is not none) or (mux_cpu_limit is defined and mux_cpu_limit is not none) %}
+{% if (mux_memory_limit is defined and mux_memory_limit is not none) or (mux_cpu_limit is defined and mux_cpu_limit is not none) or (mux_cpu_request is defined and mux_cpu_request is not none) %}
         resources:
+{%   if (mux_memory_limit is defined and mux_memory_limit is not none) or (mux_cpu_limit is defined and mux_cpu_limit is not none) %}
           limits:
-{% if mux_cpu_limit is not none %}
+{%     if mux_cpu_limit is not none %}
             cpu: "{{mux_cpu_limit}}"
-{% endif %}
-{% if mux_memory_limit is not none %}
+{%     endif %}
+{%     if mux_memory_limit is not none %}
             memory: "{{mux_memory_limit}}"
+{%     endif %}
+{%   endif %}
+{%   if (mux_memory_limit is defined and mux_memory_limit is not none) or (mux_cpu_request is defined and mux_cpu_request is not none) %}
           requests:
+{%     if mux_cpu_request is not none %}
+            cpu: "{{mux_cpu_request}}"
+{%     endif %}
+{%     if mux_memory_limit is not none %}
             memory: "{{mux_memory_limit}}"
-{% endif %}
+{%     endif %}
+{%   endif %}
 {% endif %}
         ports:
         - containerPort: "{{ openshift_logging_mux_port }}"