e2e-tests (3/4): Add gNMI integration tests with envtest - #409
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This commit introduces envtest-based integration tests for gNMI functionality
using the OpenConfig provider. The tests verify the end-to-end workflow from
Kubernetes resources to provider gNMI payloads without requiring a full cluster
deployment.
The test architecture uses a per-process gNMI test server to enable parallel
test execution with Ginkgo's --procs flag. Each Ginkgo process creates its own
suite-level server in BeforeSuite, shares it across all tests within that
process, and cleans it up in AfterSuite. Tests within each process run serially,
ensuring proper isolation through per-test namespaces and state clearing between
tests.
Testdata files support optional state/preload sections to set initial
gNMI server state before reconciliation. This is for example required to
successfully reconcile devices: the controller requires the last boot
time. Added one additional section ("delete") that represents the state
of the device after the kubernetes resource has been cleaned up. This is
usually the same as the preload section. Updated test cases
accordingly.
At the beginning of the test we set device.Status.Phase to Running
directly. This unblocks the the Device controller and avoids us having
to add more of the device data into the preload section, e.g., that
related to GetDeviceInfo, ListPorts.
As there is only one gNMI test server per process, all tests share the same device.
This means that test cases must clean up all resources they create, otherwise the
server will be polluted by the left over resources.
As Envtest runs without kube-controller-manager, there is no garbage collector
to cascade deletions, meaning each test needs to explicitly clean up resources it creates,
and it must do so in the correct order to prevent finalizer deadlocks. For example, a
Device cannot be deleted while it still has dependent resources with finalizers.
Additionally, not all custom resources in network-operator have controllers.
Resources like Interface, BGP, and OSPF have reconcilers that add finalizers and
set status conditions. Other resources (typically config-only types) are stored
in the API but have no controller — no finalizer, no conditions.
Thus, the test framework must handle: wait for conditions on controller-managed
resources, prevent blocking indefinitely on config-only ones, and clean up
resources in the correct order without relying on cascading deletion.
The waitForResource helper probes for a finalizer with a short timeout.
Controllers add finalizers early in reconciliation (within ~1 second), so if
none appears after 3 seconds, the resource is assumed to be config-only and the
helper returns immediately. For controller-managed resources, it waits for the
Ready or Configured condition.
The cleanupAllResources helper lists all network-operator resources in the
namespace, then partitions them by checking each resource's finalizers field.
Controller-managed resources (those with finalizers) are deleted first, waiting
for finalizer removal while Device still exists. Config-only resources (no
finalizers) are deleted afterward without waiting. Finally, the Device is
deleted. This approach avoids hardcoded list of resource types.
Signed-off-by: Pujol <[email protected]>
…lacks VLAN support) The OpenConfig provider does not yet support VLAN interface configuration, causing the interface_routed_vlan test to fail. Skip this test by renaming the fixture file to .skip extension until VLAN support is implemented. Signed-off-by: Pujol <[email protected]>
Enable interface_aggregate_l3 test which was previously skipped. Signed-off-by: Pujol <[email protected]>
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Merging this branch will not change overall coverage
Coverage by fileChanged files (no unit tests)
Please note that the "Total", "Covered", and "Missed" counts above refer to code statements instead of lines of code. The value in brackets refers to the test coverage of that file in the old version of the code. Changed unit test files
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This PR introduces envtest-based gNMI integration tests for the OpenConfig provider, enabling faster validation of the Kubernetes resources to gNMI sequence without requiring a full cluster deployment.
The test architecture uses a per-process gNMI server design that enables parallel test execution with Ginkgo's --procs flag. Each process creates its own suite-level server in BeforeSuite and shares it across tests running serially within that process.