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Signed-off-by: Ethan Mosbaugh <[email protected]> (cherry picked from commit 11b3197)
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/* | ||
Copyright 2024 k0s authors | ||
Licensed under the Apache License, Version 2.0 (the "License"); | ||
you may not use this file except in compliance with the License. | ||
You may obtain a copy of the License at | ||
http://www.apache.org/licenses/LICENSE-2.0 | ||
Unless required by applicable law or agreed to in writing, software | ||
distributed under the License is distributed on an "AS IS" BASIS, | ||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
See the License for the specific language governing permissions and | ||
limitations under the License. | ||
*/ | ||
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package applier | ||
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import ( | ||
"context" | ||
"embed" | ||
"os" | ||
"path" | ||
"path/filepath" | ||
"sync" | ||
"testing" | ||
"time" | ||
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kubeutil "github.com/k0sproject/k0s/internal/testutil" | ||
"github.com/k0sproject/k0s/pkg/config" | ||
"github.com/stretchr/testify/assert" | ||
"github.com/stretchr/testify/require" | ||
"k8s.io/apimachinery/pkg/api/errors" | ||
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured" | ||
"k8s.io/apimachinery/pkg/runtime/schema" | ||
"k8s.io/apimachinery/pkg/util/wait" | ||
yaml "sigs.k8s.io/yaml/goyaml.v2" | ||
) | ||
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//go:embed testdata/manager_test/* | ||
var managerTestData embed.FS | ||
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func TestManager(t *testing.T) { | ||
ctx := context.Background() | ||
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dir := t.TempDir() | ||
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cfg := &config.CfgVars{ | ||
ManifestsDir: dir, | ||
} | ||
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fakes := kubeutil.NewFakeClientFactory() | ||
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le := new(mockLeaderElector) | ||
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manager := &Manager{ | ||
K0sVars: cfg, | ||
KubeClientFactory: fakes, | ||
LeaderElector: le, | ||
} | ||
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writeStack(t, dir, "testdata/manager_test/stack1") | ||
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err := manager.Init(ctx) | ||
require.NoError(t, err) | ||
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err = manager.Start(ctx) | ||
require.NoError(t, err) | ||
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le.activate() | ||
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// validate stack that already exists is applied | ||
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cmgv, _ := schema.ParseResourceArg("configmaps.v1.") | ||
podgv, _ := schema.ParseResourceArg("pods.v1.") | ||
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waitForResource(t, fakes, *cmgv, "kube-system", "applier-test") | ||
waitForResource(t, fakes, *podgv, "kube-system", "applier-test") | ||
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r, err := getResource(fakes, *cmgv, "kube-system", "applier-test") | ||
if assert.NoError(t, err) { | ||
assert.Equal(t, "applier", r.GetLabels()["component"]) | ||
} | ||
r, err = getResource(fakes, *podgv, "kube-system", "applier-test") | ||
if assert.NoError(t, err) { | ||
assert.Equal(t, "Pod", r.GetKind()) | ||
assert.Equal(t, "applier", r.GetLabels()["component"]) | ||
} | ||
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// update the stack and verify the changes are applied | ||
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writeLabel(t, filepath.Join(dir, "stack1/pod.yaml"), "custom1", "test") | ||
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t.Log("waiting for pod to be updated") | ||
waitFor(t, 100*time.Millisecond, 5*time.Second, func(ctx context.Context) (bool, error) { | ||
r, err := getResource(fakes, *podgv, "kube-system", "applier-test") | ||
if err != nil { | ||
return false, nil | ||
} | ||
return r.GetLabels()["custom1"] == "test", nil | ||
}) | ||
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// lose and re-acquire leadership | ||
le.deactivate() | ||
le.activate() | ||
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// validate a new stack that is added is applied | ||
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writeStack(t, dir, "testdata/manager_test/stack2") | ||
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deployGV, _ := schema.ParseResourceArg("deployments.v1.apps") | ||
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waitForResource(t, fakes, *deployGV, "kube-system", "nginx") | ||
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r, err = getResource(fakes, *deployGV, "kube-system", "nginx") | ||
if assert.NoError(t, err) { | ||
assert.Equal(t, "Deployment", r.GetKind()) | ||
assert.Equal(t, "applier", r.GetLabels()["component"]) | ||
} | ||
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// update the stack after the lease aquire and verify the changes are applied | ||
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writeLabel(t, filepath.Join(dir, "stack1/pod.yaml"), "custom2", "test") | ||
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t.Log("waiting for pod to be updated") | ||
waitFor(t, 100*time.Millisecond, 5*time.Second, func(ctx context.Context) (bool, error) { | ||
r, err := getResource(fakes, *podgv, "kube-system", "applier-test") | ||
if err != nil { | ||
return false, nil | ||
} | ||
return r.GetLabels()["custom2"] == "test", nil | ||
}) | ||
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// delete the stack and verify the resources are deleted | ||
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err = os.RemoveAll(filepath.Join(dir, "stack1")) | ||
require.NoError(t, err) | ||
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t.Log("waiting for pod to be deleted") | ||
waitFor(t, 100*time.Millisecond, 5*time.Second, func(ctx context.Context) (bool, error) { | ||
_, err := getResource(fakes, *podgv, "kube-system", "applier-test") | ||
if errors.IsNotFound(err) { | ||
return true, nil | ||
} | ||
return false, nil | ||
}) | ||
} | ||
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func writeLabel(t *testing.T, file string, key string, value string) { | ||
t.Helper() | ||
contents, err := os.ReadFile(file) | ||
require.NoError(t, err) | ||
unst := map[interface{}]interface{}{} | ||
err = yaml.Unmarshal(contents, &unst) | ||
require.NoError(t, err) | ||
unst["metadata"].(map[interface{}]interface{})["labels"].(map[interface{}]interface{})[key] = value | ||
data, err := yaml.Marshal(unst) | ||
require.NoError(t, err) | ||
err = os.WriteFile(file, data, 0400) | ||
require.NoError(t, err) | ||
} | ||
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func waitForResource(t *testing.T, fakes *kubeutil.FakeClientFactory, gv schema.GroupVersionResource, namespace string, name string) { | ||
t.Logf("waiting for resource %s/%s", gv.Resource, name) | ||
waitFor(t, 100*time.Millisecond, 5*time.Second, func(ctx context.Context) (bool, error) { | ||
_, err := getResource(fakes, gv, namespace, name) | ||
if errors.IsNotFound(err) { | ||
return false, nil | ||
} else if err != nil { | ||
return false, err | ||
} | ||
return true, nil | ||
}) | ||
} | ||
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func getResource(fakes *kubeutil.FakeClientFactory, gv schema.GroupVersionResource, namespace string, name string) (*unstructured.Unstructured, error) { | ||
return fakes.DynamicClient.Resource(gv).Namespace(namespace).Get(context.Background(), name, metav1.GetOptions{}) | ||
} | ||
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func waitFor(t *testing.T, interval, timeout time.Duration, fn wait.ConditionWithContextFunc) { | ||
t.Helper() | ||
err := wait.PollUntilContextTimeout(context.Background(), interval, timeout, true, fn) | ||
require.NoError(t, err) | ||
} | ||
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func writeStack(t *testing.T, dst string, src string) { | ||
dstStackDir := filepath.Join(dst, path.Base(src)) | ||
err := os.MkdirAll(dstStackDir, 0755) | ||
require.NoError(t, err) | ||
entries, err := managerTestData.ReadDir(src) | ||
require.NoError(t, err) | ||
for _, entry := range entries { | ||
data, err := managerTestData.ReadFile(path.Join(src, entry.Name())) | ||
require.NoError(t, err) | ||
dst := filepath.Join(dstStackDir, entry.Name()) | ||
t.Logf("writing file %s", dst) | ||
err = os.WriteFile(dst, data, 0644) | ||
require.NoError(t, err) | ||
} | ||
} | ||
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type mockLeaderElector struct { | ||
mu sync.Mutex | ||
leader bool | ||
acquired []func() | ||
lost []func() | ||
} | ||
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func (e *mockLeaderElector) activate() { | ||
e.mu.Lock() | ||
defer e.mu.Unlock() | ||
if !e.leader { | ||
e.leader = true | ||
for _, fn := range e.acquired { | ||
fn() | ||
} | ||
} | ||
} | ||
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func (e *mockLeaderElector) deactivate() { | ||
e.mu.Lock() | ||
defer e.mu.Unlock() | ||
if e.leader { | ||
e.leader = false | ||
for _, fn := range e.lost { | ||
fn() | ||
} | ||
} | ||
} | ||
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func (e *mockLeaderElector) IsLeader() bool { | ||
e.mu.Lock() | ||
defer e.mu.Unlock() | ||
return e.leader | ||
} | ||
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func (e *mockLeaderElector) AddAcquiredLeaseCallback(fn func()) { | ||
e.mu.Lock() | ||
defer e.mu.Unlock() | ||
e.acquired = append(e.acquired, fn) | ||
if e.leader { | ||
fn() | ||
} | ||
} | ||
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func (e *mockLeaderElector) AddLostLeaseCallback(fn func()) { | ||
e.mu.Lock() | ||
defer e.mu.Unlock() | ||
e.lost = append(e.lost, fn) | ||
if e.leader { | ||
fn() | ||
} | ||
} |
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kind: ConfigMap | ||
apiVersion: v1 | ||
metadata: | ||
name: applier-test | ||
namespace: kube-system | ||
labels: | ||
component: applier | ||
data: | ||
foo: bar |
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kind: Pod | ||
apiVersion: v1 | ||
metadata: | ||
name: applier-test | ||
namespace: kube-system | ||
labels: | ||
component: applier | ||
spec: | ||
containers: | ||
- name: nginx | ||
image: nginx:1.15 |
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apiVersion: apps/v1 | ||
kind: Deployment | ||
metadata: | ||
name: nginx | ||
namespace: kube-system | ||
labels: | ||
component: applier | ||
spec: | ||
selector: | ||
matchLabels: | ||
app: nginx | ||
template: | ||
metadata: | ||
labels: | ||
app: nginx | ||
spec: | ||
containers: | ||
- name: nginx | ||
image: docker.io/nginx:1-alpine | ||
resources: | ||
limits: | ||
memory: "64Mi" | ||
cpu: "100m" | ||
ports: | ||
- containerPort: 80 |