Add k8s resource limit patch lib

.github/workflows/ci.yaml

@@ -1,5 +1,5 @@
 name: Observability Libs CI
-on: 
+on:
   pull_request:
     branches:
       - main
@@ -14,10 +14,20 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v2
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
       - name: Install dependencies
         run: python3 -m pip install tox
-      - name: Run static analysis
-        run: tox -vve static
+      - name: Run static analysis (lib)
+        run: tox -vve static-lib
+      - name: Run static analysis (charm)
+        run: tox -vve static-charm
+      - name: Run static analysis (unit tests)
+        run: tox -vve static-unit
+      - name: Run static analysis (integration tests)
+        run: tox -vve static-integration
   lint:
     name: Lint
     runs-on: ubuntu-latest
@@ -38,3 +48,17 @@ jobs:
         run: python -m pip install tox
       - name: Run tests
         run: tox -vve unit
+  integration-test:
+    name: Integration tests (microk8s)
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Setup operator environment
+        uses: charmed-kubernetes/actions-operator@main
+        with:
+          juju-channel: latest/stable
+          provider: microk8s
+          bootstrap-options: "--agent-version 2.9.29"
+      - name: Run integration tests
+        run: tox -vve integration

README.md

@@ -7,22 +7,32 @@ are used for the development of charms deployed as part of the LMA Light [bundle
 
 ## Usage
 
-While it is possible to deploy this charm, it is essentially a no-op, and not what this charm was
-designed for. Instructions are omitted. This may change in the near future.
+While it is possible to deploy this charm, it is only a tester charm and is
+intended to be deployed only for testing purposes.
+
+```shell
+charmcraft pack
+juju deploy ./observability-libs_ubuntu-20.04-amd64.charm \
+  --resource placeholder-image=busybox
+```
 
 Where this charm should be used, is to access one of the following libraries during development:
 
 - [KubernetesServicePatch] - a small library used to patch the Juju auto-created Kubernetes Service
   during the deployment of a sidecar charm to contain the correct ports for an application.
 
-- [JujuTopology] - Used to create and output Juju topologies either from charms, relation data, or parts. 
+- [KubernetesComputeResourcesPatch] - a small library used to patch the Juju
+  auto-created statefulset with custom resource limits.
+
+- [JujuTopology] - Used to create and output Juju topologies either from charms, relation data, or parts.
 
 ## Contributing
 
 Please see the [Juju SDK docs](https://juju.is/docs/sdk) for guidelines on enhancements to this
 charm following best practice guidelines, and `CONTRIBUTING.md` for developer guidance.
 
-[kubernetesservicepatch]: https://charmhub.io/observability-libs/libraries/kubernetes_service_patch
+[KubernetesServicePatch]: https://charmhub.io/observability-libs/libraries/kubernetes_service_patch
+[KubernetesComputeResourcesPatch]: https://charmhub.io/observability-libs/libraries/kubernetes_compute_resources_patch
 [bundle]: https://charmhub.io/lma-light
 [charm libraries]: https://juju.is/docs/sdk/libraries
-[JujuTopology]: https://charmhub.io/observability-libs/libraries/juju_topology
+[JujuTopology]: https://charmhub.io/observability-libs/libraries/juju_topology

config.yaml

@@ -0,0 +1,13 @@
+# Copyright 2022 Canonical Ltd.
+# See LICENSE file for licensing details.
+options:
+  cpu:
+    description: |
+      K8s cpu resource limit, e.g. "1" or "500m". Default is unset (no limit).
+      See https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/
+    type: string
+  memory:
+    description: |
+      K8s memory resource limit, e.g. "1Gi". Default is unset (no limit).
+      See https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/
+    type: string