Add cluster runtime constraints handling

Signed-off-by: Per G. da Silva <[email protected]>

Author: perdasilva

manifests/0000_50_olm_08-catalog-operator.deployment.ibm-cloud-managed.yaml

@@ -78,6 +78,8 @@ spec:
           env:
             - name: RELEASE_VERSION
               value: "0.0.1-snapshot"
+            - name: RUNTIME_CONSTRAINTS
+              value: "/opt/olm/runtime_constraints.json"
       nodeSelector:
         kubernetes.io/os: linux
       tolerations:

manifests/0000_50_olm_08-catalog-operator.deployment.yaml

@@ -79,6 +79,8 @@ spec:
           env:
             - name: RELEASE_VERSION
               value: "0.0.1-snapshot"
+            - name: RUNTIME_CONSTRAINTS
+              value: "/opt/olm/runtime_constraints.json"
       nodeSelector:
         kubernetes.io/os: linux
         node-role.kubernetes.io/master: ""

operator-lifecycle-manager.Dockerfile

@@ -27,6 +27,9 @@ COPY --from=builder /build/bin/package-server /bin/package-server
 COPY --from=builder /build/bin/cpb /bin/cpb
 COPY --from=builder /build/bin/psm /bin/psm
 
+# Add runtime constraints
+COPY --from=builder /build/runtime_constraints/runtime_constraints.json /opt/olm/runtime_constraints.json
+
 # This image doesn't need to run as root user.
 USER 1001
 

runtime_constraints/README.md

@@ -0,0 +1,11 @@
+# Cluster Runtime Constraints
+
+Cluster runtime constraints are base constraints that always get applied to the resolution process to avoid installing
+packages that might be unsuitable for the cluster (consumes too many resources, wrong kubernetes/ocp version, etc.). 
+Currently, there's no first class way to do this. Until we design the canonical way to define
+cluster runtime constraints, we are making availing a stopgap solution for IBM and OCP, we:
+  1. Are adding a file to the downstream OLM image that includes the runtime constraints
+  2. Have modified the upstream catalog operator to load the runtime constraints in to the resolver if a `RUNTIME_CONSTRAINTS` environment variable is defined
+  3. Update the deployment manifests for the olm catalog operator deployment to add the `RUNTIME_CONSTRAINTS` environment variable
+
+The upstream PR enabling this behavior is [https://github.com/operator-framework/operator-lifecycle-manager/pull/2498](#2498).

runtime_constraints/runtime_constraints.json

@@ -0,0 +1,11 @@
+{
+  "properties": [
+    {
+      "type": "olm.package",
+      "value": {
+        "packageName": "etcd",
+        "version": "1.0.0"
+      }
+    }
+  ]
+}