feat(k8s): add configmap support

[abrahamjoc]

Description

Read the Gruntwork contribution guidelines.

• Run the relevant tests successfully, including pre-commit checks.
• Include release notes. If this PR is backward incompatible, include a migration guide.

Release Notes (draft)

Added / Removed / Updated [X].

Added func to get k8s ConfigMap.

• GetConfigMap
• GetConfigMapE
• WaitUntilConfigMapAvailable

[abrahamjoc]

Here, output of go test.

=== RUN   TestGetConfigMapEReturnsErrorForNonExistantConfigMap
=== PAUSE TestGetConfigMapEReturnsErrorForNonExistantConfigMap
=== CONT  TestGetConfigMapEReturnsErrorForNonExistantConfigMap
--- PASS: TestGetConfigMapEReturnsErrorForNonExistantConfigMap (0.07s)
TestGetConfigMapEReturnsCorrectConfigMapInCorrectNamespace 2022-12-09T11:49:08-03:00 logger.go:66: namespace/2blxun created
TestWaitUntilConfigMapAvailableReturnsSuccessfully 2022-12-09T11:49:08-03:00 logger.go:66: namespace/nxsfh6 created
TestGetConfigMapEReturnsCorrectConfigMapInCorrectNamespace 2022-12-09T11:49:08-03:00 logger.go:66: configmap/test-config-map created
TestWaitUntilConfigMapAvailableReturnsSuccessfully 2022-12-09T11:49:08-03:00 logger.go:66: configmap/test-config-map created
TestGetConfigMapEReturnsCorrectConfigMapInCorrectNamespace 2022-12-09T11:49:08-03:00 client.go:42: Configuring Kubernetes client using config file /home/abraham/.kube/config with context 
TestWaitUntilConfigMapAvailableReturnsSuccessfully 2022-12-09T11:49:08-03:00 retry.go:91: Wait for configmap test-config-map to be provisioned.
TestWaitUntilConfigMapAvailableReturnsSuccessfully 2022-12-09T11:49:08-03:00 client.go:42: Configuring Kubernetes client using config file /home/abraham/.kube/config with context 
TestGetConfigMapEReturnsCorrectConfigMapInCorrectNamespace 2022-12-09T11:49:08-03:00 logger.go:66: Running command kubectl with args [--namespace 2blxun delete -f /tmp/TestGetConfigMapEReturnsCorrectConfigMapInCorrectNamespace337781714]
TestWaitUntilConfigMapAvailableReturnsSuccessfully 2022-12-09T11:49:08-03:00 configmap.go:52: configmap is now available
TestWaitUntilConfigMapAvailableReturnsSuccessfully 2022-12-09T11:49:08-03:00 logger.go:66: Running command kubectl with args [--namespace nxsfh6 delete -f /tmp/TestWaitUntilConfigMapAvailableReturnsSuccessfully3778149765]
TestGetConfigMapEReturnsCorrectConfigMapInCorrectNamespace 2022-12-09T11:49:08-03:00 logger.go:66: Warning: deleting cluster-scoped resources, not scoped to the provided namespace
TestWaitUntilConfigMapAvailableReturnsSuccessfully 2022-12-09T11:49:08-03:00 logger.go:66: Warning: deleting cluster-scoped resources, not scoped to the provided namespace
TestGetConfigMapEReturnsCorrectConfigMapInCorrectNamespace 2022-12-09T11:49:08-03:00 logger.go:66: namespace "2blxun" deleted
TestWaitUntilConfigMapAvailableReturnsSuccessfully 2022-12-09T11:49:08-03:00 logger.go:66: namespace "nxsfh6" deleted
TestGetConfigMapEReturnsCorrectConfigMapInCorrectNamespace 2022-12-09T11:49:08-03:00 logger.go:66: configmap "test-config-map" deleted
TestWaitUntilConfigMapAvailableReturnsSuccessfully 2022-12-09T11:49:08-03:00 logger.go:66: configmap "test-config-map" deleted
=== RUN   TestGetConfigMapEReturnsCorrectConfigMapInCorrectNamespace
=== PAUSE TestGetConfigMapEReturnsCorrectConfigMapInCorrectNamespace
=== CONT  TestGetConfigMapEReturnsCorrectConfigMapInCorrectNamespace
TestWaitUntilConfigMapAvailableReturnsSuccessfully 2022-12-09T11:49:07-03:00 logger.go:66: Running command kubectl with args [--namespace nxsfh6 apply -f /tmp/TestWaitUntilConfigMapAvailableReturnsSuccessfully3891172061]
TestGetConfigMapEReturnsCorrectConfigMapInCorrectNamespace 2022-12-09T11:49:07-03:00 logger.go:66: Running command kubectl with args [--namespace 2blxun apply -f /tmp/TestGetConfigMapEReturnsCorrectConfigMapInCorrectNamespace1114146349]
--- PASS: TestGetConfigMapEReturnsCorrectConfigMapInCorrectNamespace (6.90s)
=== RUN   TestWaitUntilConfigMapAvailableReturnsSuccessfully
=== PAUSE TestWaitUntilConfigMapAvailableReturnsSuccessfully
=== CONT  TestWaitUntilConfigMapAvailableReturnsSuccessfully
TestGetConfigMapEReturnsErrorForNonExistantConfigMap 2022-12-09T11:49:07-03:00 client.go:42: Configuring Kubernetes client using config file /home/abraham/.kube/config with context 
--- PASS: TestWaitUntilConfigMapAvailableReturnsSuccessfully (6.93s)
PASS

Process finished with the exit code 0

[denis256]

👍 failed tests aren't related with added changes