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Fix labels for Service Monitors #2878

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merged 24 commits into from
May 20, 2024
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1625097
Create a separate Service Monitor when the Prometheus exporter is pre…
iblancasa Apr 22, 2024
78f1315
Merge branch 'main' of github.com:open-telemetry/opentelemetry-operat…
iblancasa Apr 25, 2024
9ccd87f
Improve changelog
iblancasa Apr 25, 2024
5f55a01
Fix prometheus-cr E2E test
iblancasa Apr 25, 2024
e3174b6
Remove unused target
iblancasa Apr 25, 2024
edfb463
Merge branch 'main' into bug/2877
iblancasa Apr 26, 2024
82fefa2
Merge branch 'main' of github.com:open-telemetry/opentelemetry-operat…
iblancasa Apr 29, 2024
28baa37
Add docstring
iblancasa Apr 29, 2024
7dcaadb
Merge branch 'main' of github.com:open-telemetry/opentelemetry-operat…
iblancasa May 3, 2024
2e143ee
Fix typo
iblancasa May 3, 2024
cc96402
Merge branch 'main' of github.com:open-telemetry/opentelemetry-operat…
iblancasa May 8, 2024
978dfa0
Merge branch 'main' into bug/2877
iblancasa May 8, 2024
f5b29d8
Change the label name
iblancasa May 9, 2024
fff9870
Merge branch 'bug/2877' of github.com:iblancasa/opentelemetry-operato…
iblancasa May 9, 2024
6432371
Merge branch 'main' into bug/2877
iblancasa May 13, 2024
2469162
Merge branch 'bug/2877' of github.com:iblancasa/opentelemetry-operato…
iblancasa May 13, 2024
0b2a439
Merge branch 'main' of github.com:open-telemetry/opentelemetry-operat…
iblancasa May 13, 2024
3712c43
Change changelog description
iblancasa May 13, 2024
743247b
Merge branch 'main' into bug/2877
iblancasa May 14, 2024
552cb3e
Merge branch 'main' of github.com:open-telemetry/opentelemetry-operat…
iblancasa May 17, 2024
720c6b1
Recover removed labels
iblancasa May 17, 2024
d1889d0
Merge branch 'main' of github.com:open-telemetry/opentelemetry-operat…
iblancasa May 17, 2024
cc84a10
Add missing labels
iblancasa May 17, 2024
e5b251c
Remove wrong labels
iblancasa May 19, 2024
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18 changes: 18 additions & 0 deletions .chloggen/bug_2877.yaml
Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
change_type: bug_fix

# The name of the component, or a single word describing the area of concern, (e.g. collector, target allocator, auto-instrumentation, opamp, github action)
component: collector

# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
note: |
Create a Service Monitor for the collector Service when Prometheus exporter is used. A different Service Monitor is created for the monitoring service.
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This helps excluding the headless service (duplicating the metrics collectiong) and splits responsibilities between the two Service Monitors.
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# One or more tracking issues related to the change
issues: [2877]

# (Optional) One or more lines of additional information to render under the primary note.
# These lines will be padded with 2 spaces and then inserted directly into the document.
# Use pipe (|) for multiline entries.
subtext:
4 changes: 0 additions & 4 deletions Makefile
Original file line number Diff line number Diff line change
Expand Up @@ -312,10 +312,6 @@ endif
install-metrics-server:
./hack/install-metrics-server.sh

.PHONY: install-prometheus-operator
install-prometheus-operator:
./hack/install-prometheus-operator.sh

# This only installs the CRDs Target Allocator supports
.PHONY: install-targetallocator-prometheus-crds
install-targetallocator-prometheus-crds:
Expand Down
39 changes: 21 additions & 18 deletions controllers/builder_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -259,12 +259,13 @@ service:
Name: "test-collector",
Namespace: "test",
Labels: map[string]string{
"app.kubernetes.io/component": "opentelemetry-collector",
"app.kubernetes.io/instance": "test.test",
"app.kubernetes.io/managed-by": "opentelemetry-operator",
"app.kubernetes.io/name": "test-collector",
"app.kubernetes.io/part-of": "opentelemetry",
"app.kubernetes.io/version": "latest",
"app.kubernetes.io/component": "opentelemetry-collector",
"app.kubernetes.io/instance": "test.test",
"app.kubernetes.io/managed-by": "opentelemetry-operator",
"app.kubernetes.io/name": "test-collector",
"app.kubernetes.io/part-of": "opentelemetry",
"app.kubernetes.io/version": "latest",
"operator.opentelemetry.io/collector-service": "Exists",
},
Annotations: nil,
},
Expand Down Expand Up @@ -506,12 +507,13 @@ service:
Name: "test-collector",
Namespace: "test",
Labels: map[string]string{
"app.kubernetes.io/component": "opentelemetry-collector",
"app.kubernetes.io/instance": "test.test",
"app.kubernetes.io/managed-by": "opentelemetry-operator",
"app.kubernetes.io/name": "test-collector",
"app.kubernetes.io/part-of": "opentelemetry",
"app.kubernetes.io/version": "latest",
"app.kubernetes.io/component": "opentelemetry-collector",
"app.kubernetes.io/instance": "test.test",
"app.kubernetes.io/managed-by": "opentelemetry-operator",
"app.kubernetes.io/name": "test-collector",
"app.kubernetes.io/part-of": "opentelemetry",
"app.kubernetes.io/version": "latest",
"operator.opentelemetry.io/collector-service": "Exists",
},
Annotations: nil,
},
Expand Down Expand Up @@ -774,12 +776,13 @@ service:
Name: "test-collector",
Namespace: "test",
Labels: map[string]string{
"app.kubernetes.io/component": "opentelemetry-collector",
"app.kubernetes.io/instance": "test.test",
"app.kubernetes.io/managed-by": "opentelemetry-operator",
"app.kubernetes.io/name": "test-collector",
"app.kubernetes.io/part-of": "opentelemetry",
"app.kubernetes.io/version": "latest",
"app.kubernetes.io/component": "opentelemetry-collector",
"app.kubernetes.io/instance": "test.test",
"app.kubernetes.io/managed-by": "opentelemetry-operator",
"app.kubernetes.io/name": "test-collector",
"app.kubernetes.io/part-of": "opentelemetry",
"app.kubernetes.io/version": "latest",
"operator.opentelemetry.io/collector-service": "Exists",
},
Annotations: nil,
},
Expand Down
2 changes: 1 addition & 1 deletion internal/manifests/collector/collector.go
Original file line number Diff line number Diff line change
Expand Up @@ -56,7 +56,7 @@ func Build(params manifests.Params) ([]client.Object, error) {
if params.OtelCol.Spec.Mode == v1beta1.ModeSidecar {
manifestFactories = append(manifestFactories, manifests.Factory(PodMonitor))
} else {
manifestFactories = append(manifestFactories, manifests.Factory(ServiceMonitor))
manifestFactories = append(manifestFactories, manifests.Factory(ServiceMonitor), manifests.Factory(ServiceMonitorMonitoring))
}
}

Expand Down
37 changes: 21 additions & 16 deletions internal/manifests/collector/podmonitor.go
Original file line number Diff line number Diff line change
Expand Up @@ -31,28 +31,14 @@ import (

// PodMonitor returns the pod monitor for the given instance.
func PodMonitor(params manifests.Params) (*monitoringv1.PodMonitor, error) {
if !params.OtelCol.Spec.Observability.Metrics.EnableMetrics {
params.Log.V(2).Info("Metrics disabled for this OTEL Collector",
"params.OtelCol.name", params.OtelCol.Name,
"params.OtelCol.namespace", params.OtelCol.Namespace,
)
return nil, nil
} else if params.Config.PrometheusCRAvailability() == prometheus.NotAvailable {
params.Log.V(1).Info("Cannot enable PodMonitor when prometheus CRDs are unavailable",
"params.OtelCol.name", params.OtelCol.Name,
"params.OtelCol.namespace", params.OtelCol.Namespace,
)
if !shouldCreatePodMonitor(params) {
return nil, nil
}
var pm monitoringv1.PodMonitor

if params.OtelCol.Spec.Mode != v1beta1.ModeSidecar {
return nil, nil
}
name := naming.PodMonitor(params.OtelCol.Name)
labels := manifestutils.Labels(params.OtelCol.ObjectMeta, name, params.OtelCol.Spec.Image, ComponentOpenTelemetryCollector, nil)
selectorLabels := manifestutils.SelectorLabels(params.OtelCol.ObjectMeta, ComponentOpenTelemetryCollector)
pm = monitoringv1.PodMonitor{
pm := monitoringv1.PodMonitor{
ObjectMeta: metav1.ObjectMeta{
Namespace: params.OtelCol.Namespace,
Name: name,
Expand Down Expand Up @@ -107,3 +93,22 @@ func metricsEndpointsFromConfig(logger logr.Logger, otelcol v1beta1.OpenTelemetr
}
return metricsEndpoints
}

func shouldCreatePodMonitor(params manifests.Params) bool {
l := params.Log.WithValues(
"params.OtelCol.name", params.OtelCol.Name,
"params.OtelCol.namespace", params.OtelCol.Namespace,
)

if !params.OtelCol.Spec.Observability.Metrics.EnableMetrics {
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personal opinion but this statement can be written in a more readable way

if params.OtelCol.Spec.Observability.Metrics.EnableMetrics &&  params.Config.PrometheusCRAvailability() == prometheus.NotAvailable && params.OtelCol.Spec.Mode == v1beta1.ModeSidecar{
  return true
}

l..V(2).Info("PodMonitor will not be created", "Metrics.enabledMetrics", "params.OtelCol.Spec.Observability.Metrics.EnableMetrics ", ....)
return false

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and I would move the logger creation close to returning false

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Why a double condition + no log message is easier to read than the current approach?

The current is easy to follow and understand why the method returns false.

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A single log message with all parameters makes it clear to understand the overall state.

The function has 2 states (true and false), aligning the condition to it makes it easier to understand

l.V(2).Info("Metrics disabled for this OTEL Collector. PodMonitor will not ve created")
return false
} else if params.Config.PrometheusCRAvailability() == prometheus.NotAvailable {
l.V(2).Info("Cannot enable PodMonitor when prometheus CRDs are unavailable")
return false
} else if params.OtelCol.Spec.Mode != v1beta1.ModeSidecar {
l.V(2).Info("Not using sidecar mode. PodMonitor will not be created")
return false
}
return true
}
3 changes: 3 additions & 0 deletions internal/manifests/collector/service.go
Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,7 @@ import (
// headless and monitoring labels are to differentiate the headless/monitoring services from the clusterIP service.
const (
headlessLabel = "operator.opentelemetry.io/collector-headless-service"
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headfulLabel = "operator.opentelemetry.io/collector-service"
monitoringLabel = "operator.opentelemetry.io/collector-monitoring-service"
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@iblancasa i think we should keep these around for now, mark them as deprecated and remove them in two+ versions rather than deleting them outright which would constitute a breaking change.

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Done

valueExists = "Exists"
)
Expand All @@ -44,6 +45,7 @@ func HeadlessService(params manifests.Params) (*corev1.Service, error) {

h.Name = naming.HeadlessService(params.OtelCol.Name)
h.Labels[headlessLabel] = valueExists
delete(h.Labels, headfulLabel)

// copy to avoid modifying params.OtelCol.Annotations
annotations := map[string]string{
Expand Down Expand Up @@ -90,6 +92,7 @@ func MonitoringService(params manifests.Params) (*corev1.Service, error) {
func Service(params manifests.Params) (*corev1.Service, error) {
name := naming.Service(params.OtelCol.Name)
labels := manifestutils.Labels(params.OtelCol.ObjectMeta, name, params.OtelCol.Spec.Image, ComponentOpenTelemetryCollector, []string{})
labels[headfulLabel] = valueExists

out, err := params.OtelCol.Spec.Config.Yaml()
if err != nil {
Expand Down
1 change: 1 addition & 0 deletions internal/manifests/collector/service_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -286,6 +286,7 @@ func service(name string, ports []v1beta1.PortsSpec) v1.Service {
func serviceWithInternalTrafficPolicy(name string, ports []v1beta1.PortsSpec, internalTrafficPolicy v1.ServiceInternalTrafficPolicyType) v1.Service {
params := deploymentParams()
labels := manifestutils.Labels(params.OtelCol.ObjectMeta, name, params.OtelCol.Spec.Image, ComponentOpenTelemetryCollector, []string{})
labels[headfulLabel] = valueExists

svcPorts := []v1.ServicePort{}
for _, p := range ports {
Expand Down
70 changes: 48 additions & 22 deletions internal/manifests/collector/servicemonitor.go
Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@
package collector

import (
"fmt"
"strings"

"github.com/go-logr/logr"
Expand All @@ -29,30 +30,40 @@ import (
"github.com/open-telemetry/opentelemetry-operator/internal/naming"
)

// ServiceMonitor returns the service monitor for the given instance.
// ServiceMonitor returns the service monitor for the collector.
func ServiceMonitor(params manifests.Params) (*monitoringv1.ServiceMonitor, error) {
if !params.OtelCol.Spec.Observability.Metrics.EnableMetrics {
params.Log.V(2).Info("Metrics disabled for this OTEL Collector",
"params.OtelCol.name", params.OtelCol.Name,
"params.OtelCol.namespace", params.OtelCol.Namespace,
)
return nil, nil
} else if params.Config.PrometheusCRAvailability() == prometheus.NotAvailable {
params.Log.V(1).Info("Cannot enable ServiceMonitor when prometheus CRDs are unavailable",
"params.OtelCol.name", params.OtelCol.Name,
"params.OtelCol.namespace", params.OtelCol.Namespace,
)
return nil, nil
name := naming.ServiceMonitor(params.OtelCol.Name)
endpoints := endpointsFromConfig(params.Log, params.OtelCol)
if len(endpoints) > 0 {
return createServiceMonitor(name, params, headfulLabel, endpoints)
}
var sm monitoringv1.ServiceMonitor
return nil, nil
}

// ServiceMonitor returns the service monitor for the monitoring service of the collector.
func ServiceMonitorMonitoring(params manifests.Params) (*monitoringv1.ServiceMonitor, error) {
name := naming.ServiceMonitor(fmt.Sprintf("%s-monitoring", params.OtelCol.Name))
endpoints := []monitoringv1.Endpoint{
{
Port: "monitoring",
},
}
return createServiceMonitor(name, params, monitoringLabel, endpoints)
}

if params.OtelCol.Spec.Mode == v1beta1.ModeSidecar {
// createServiceMonitor creates a Service Monitor using the provided name, the params from the instance, a label to identify the service
// to target (like the monitoring or the collector services) and the endpoints to scrape.
func createServiceMonitor(name string, params manifests.Params, label string, endpoints []monitoringv1.Endpoint) (*monitoringv1.ServiceMonitor, error) {
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if !shouldCreateServiceMonitor(params) {
return nil, nil
}
name := naming.ServiceMonitor(params.OtelCol.Name)

var sm monitoringv1.ServiceMonitor

labels := manifestutils.Labels(params.OtelCol.ObjectMeta, name, params.OtelCol.Spec.Image, ComponentOpenTelemetryCollector, []string{})
selectorLabels := manifestutils.SelectorLabels(params.OtelCol.ObjectMeta, ComponentOpenTelemetryCollector)
selectorLabels[monitoringLabel] = valueExists
// This label is the one which differentiates the services
selectorLabels[label] = valueExists

sm = monitoringv1.ServiceMonitor{
ObjectMeta: metav1.ObjectMeta{
Expand All @@ -61,11 +72,7 @@ func ServiceMonitor(params manifests.Params) (*monitoringv1.ServiceMonitor, erro
Labels: labels,
},
Spec: monitoringv1.ServiceMonitorSpec{
Endpoints: append([]monitoringv1.Endpoint{
{
Port: "monitoring",
},
}, endpointsFromConfig(params.Log, params.OtelCol)...),
Endpoints: endpoints,
NamespaceSelector: monitoringv1.NamespaceSelector{
MatchNames: []string{params.OtelCol.Namespace},
},
Expand All @@ -78,6 +85,25 @@ func ServiceMonitor(params manifests.Params) (*monitoringv1.ServiceMonitor, erro
return &sm, nil
}

func shouldCreateServiceMonitor(params manifests.Params) bool {
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personal opinion but this statement can be written in a more readable way

See the previous comment

l := params.Log.WithValues(
"params.OtelCol.name", params.OtelCol.Name,
"params.OtelCol.namespace", params.OtelCol.Namespace,
)

if !params.OtelCol.Spec.Observability.Metrics.EnableMetrics {
l.V(2).Info("Metrics disabled for this OTEL Collector. ServiceMonitor will not ve created")
return false
} else if params.Config.PrometheusCRAvailability() == prometheus.NotAvailable {
l.V(2).Info("Cannot enable ServiceMonitor when prometheus CRDs are unavailable")
return false
} else if params.OtelCol.Spec.Mode == v1beta1.ModeSidecar {
l.V(2).Info("Using sidecar mode. ServiceMonitor will not be created")
return false
}
return true
}

func endpointsFromConfig(logger logr.Logger, otelcol v1beta1.OpenTelemetryCollector) []monitoringv1.Endpoint {
// TODO: https://github.com/open-telemetry/opentelemetry-operator/issues/2603
cfgStr, err := otelcol.Spec.Config.Yaml()
Expand Down
31 changes: 20 additions & 11 deletions internal/manifests/collector/servicemonitor_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -34,18 +34,26 @@ func TestDesiredServiceMonitors(t *testing.T) {
params.OtelCol.Spec.Observability.Metrics.EnableMetrics = true
actual, err = ServiceMonitor(params)
assert.NoError(t, err)
assert.Nil(t, actual)

// Check the monitoring SM
actual, err = ServiceMonitorMonitoring(params)
assert.NoError(t, err)
assert.NotNil(t, actual)
assert.Equal(t, fmt.Sprintf("%s-collector", params.OtelCol.Name), actual.Name)
assert.Equal(t, fmt.Sprintf("%s-monitoring-collector", params.OtelCol.Name), actual.Name)
assert.Equal(t, params.OtelCol.Namespace, actual.Namespace)
assert.Equal(t, "monitoring", actual.Spec.Endpoints[0].Port)
expectedSelectorLabels := map[string]string{
expectedSelectorLabelsMonitor := map[string]string{
"app.kubernetes.io/component": "opentelemetry-collector",
"app.kubernetes.io/instance": "default.test",
"app.kubernetes.io/managed-by": "opentelemetry-operator",
"app.kubernetes.io/part-of": "opentelemetry",
"operator.opentelemetry.io/collector-monitoring-service": "Exists",
}
assert.Equal(t, expectedSelectorLabels, actual.Spec.Selector.MatchLabels)
assert.Equal(t, expectedSelectorLabelsMonitor, actual.Spec.Selector.MatchLabels)
assert.NotContains(t, "operator.opentelemetry.io/collector-headless-service", actual.Spec.Selector.MatchLabels)
assert.NotContains(t, "operator.opentelemetry.io/collector-service", actual.Spec.Selector.MatchLabels)

}

func TestDesiredServiceMonitorsWithPrometheus(t *testing.T) {
Expand All @@ -57,17 +65,18 @@ func TestDesiredServiceMonitorsWithPrometheus(t *testing.T) {
assert.NotNil(t, actual)
assert.Equal(t, fmt.Sprintf("%s-collector", params.OtelCol.Name), actual.Name)
assert.Equal(t, params.OtelCol.Namespace, actual.Namespace)
assert.Equal(t, "monitoring", actual.Spec.Endpoints[0].Port)
assert.Equal(t, "prometheus-dev", actual.Spec.Endpoints[1].Port)
assert.Equal(t, "prometheus-prod", actual.Spec.Endpoints[2].Port)
assert.Equal(t, "prometheus-dev", actual.Spec.Endpoints[0].Port)
assert.Equal(t, "prometheus-prod", actual.Spec.Endpoints[1].Port)
expectedSelectorLabels := map[string]string{
"app.kubernetes.io/component": "opentelemetry-collector",
"app.kubernetes.io/instance": "default.test",
"app.kubernetes.io/managed-by": "opentelemetry-operator",
"app.kubernetes.io/part-of": "opentelemetry",
"operator.opentelemetry.io/collector-monitoring-service": "Exists",
"app.kubernetes.io/component": "opentelemetry-collector",
"app.kubernetes.io/instance": "default.test",
"app.kubernetes.io/managed-by": "opentelemetry-operator",
"app.kubernetes.io/part-of": "opentelemetry",
"operator.opentelemetry.io/collector-service": "Exists",
}
assert.Equal(t, expectedSelectorLabels, actual.Spec.Selector.MatchLabels)
assert.NotContains(t, "operator.opentelemetry.io/collector-headless-service", actual.Spec.Selector.MatchLabels)
assert.NotContains(t, "operator.opentelemetry.io/collector-monitoring-service", actual.Spec.Selector.MatchLabels)
}

func TestDesiredServiceMonitorsPrometheusNotAvailable(t *testing.T) {
Expand Down
8 changes: 3 additions & 5 deletions tests/e2e-openshift/monitoring/01-assert.yaml
Original file line number Diff line number Diff line change
Expand Up @@ -15,22 +15,21 @@ status:
availableReplicas: 1
readyReplicas: 1
replicas: 1

---
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
labels:
app.kubernetes.io/managed-by: opentelemetry-operator
app.kubernetes.io/name: cluster-collector-collector
name: cluster-collector-collector
app.kubernetes.io/name: cluster-collector-monitoring-collector
name: cluster-collector-monitoring-collector
spec:
endpoints:
- port: monitoring
selector:
matchLabels:
app.kubernetes.io/managed-by: opentelemetry-operator

operator.opentelemetry.io/collector-monitoring-service: Exists
---
apiVersion: v1
kind: Service
Expand Down Expand Up @@ -87,7 +86,6 @@ spec:
app.kubernetes.io/managed-by: opentelemetry-operator
app.kubernetes.io/part-of: opentelemetry
type: ClusterIP

---
apiVersion: v1
kind: Service
Expand Down
14 changes: 14 additions & 0 deletions tests/e2e-openshift/monitoring/04-assert.yaml
Original file line number Diff line number Diff line change
@@ -0,0 +1,14 @@
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
labels:
app.kubernetes.io/managed-by: opentelemetry-operator
app.kubernetes.io/name: cluster-collector2-collector
name: cluster-collector2-collector
spec:
endpoints:
- port: prometheus
selector:
matchLabels:
app.kubernetes.io/managed-by: opentelemetry-operator
operator.opentelemetry.io/collector-service: Exists
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