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sidecar_test.go
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package main
import (
"bytes"
"fmt"
"os"
"reflect"
"strings"
"testing"
logrTesting "github.com/go-logr/logr/testing"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
encode "k8s.io/apimachinery/pkg/runtime/serializer/json"
)
var (
testEmptySecret = `
apiVersion: v1
kind: Secret
metadata:
annotations:
app.kubernetes.io/managed-by: telegraf-operator
creationTimestamp: null
labels:
telegraf.influxdata.com/class: default
telegraf.influxdata.com/pod: myname
name: telegraf-config-myname
namespace: mynamespace
stringData:
telegraf.conf: |2+
type: Opaque`
testEmptyIstioSecret = `
apiVersion: v1
kind: Secret
metadata:
annotations:
app.kubernetes.io/managed-by: telegraf-operator
creationTimestamp: null
labels:
telegraf.influxdata.com/class: istio
telegraf.influxdata.com/pod: myname
name: telegraf-istio-config-myname
namespace: mynamespace
stringData:
telegraf.conf: |2-
[[inputs.prometheus]]
urls = ["http://127.0.0.1:15090/stats/prometheus"]
# istio outputs
type: Opaque`
)
type mockClassDataHandler struct {
classes map[string]string
}
func newMockClassDataHandler(classes map[string]string) *mockClassDataHandler {
return &mockClassDataHandler{classes: classes}
}
func (h *mockClassDataHandler) validateClassData() error {
return nil
}
func (m *mockClassDataHandler) getData(className string) (string, error) {
v, ok := m.classes[className]
if ok {
return v, nil
} else {
return "", fmt.Errorf("class %s not found", className)
}
}
func Test_skip(t *testing.T) {
handler := &sidecarHandler{
RequestsCPU: defaultRequestsCPU,
RequestsMemory: defaultRequestsMemory,
LimitsCPU: defaultLimitsCPU,
LimitsMemory: defaultLimitsMemory,
}
withTelegraf := &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafInterval: "10s",
},
},
}
if handler.skip(withTelegraf) {
t.Errorf("pod %v should not be skipped", withTelegraf.GetAnnotations())
}
withoutTelegraf := &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
"something": "else",
},
},
}
if !handler.skip(withoutTelegraf) {
t.Errorf("pod %v should be skipped", withoutTelegraf.GetAnnotations())
}
}
func Test_validateRequestsAndLimits(t *testing.T) {
tests := []struct {
name string
sidecar *sidecarHandler
wantErr bool
}{
{
name: "validate default values",
sidecar: &sidecarHandler{
RequestsCPU: defaultRequestsCPU,
RequestsMemory: defaultRequestsMemory,
LimitsCPU: defaultLimitsCPU,
LimitsMemory: defaultLimitsMemory,
},
wantErr: false,
},
{
name: "validate incorrect values",
sidecar: &sidecarHandler{
RequestsCPU: "100x",
RequestsMemory: "100x",
LimitsCPU: "100x",
LimitsMemory: "100x",
},
wantErr: true,
},
{
name: "validate empty values are accepted",
sidecar: &sidecarHandler{
RequestsCPU: "",
RequestsMemory: "",
LimitsCPU: "",
LimitsMemory: "",
},
wantErr: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
tt.sidecar.Logger = &logrTesting.TestLogger{T: t}
err := tt.sidecar.validateRequestsAndLimits()
if tt.wantErr && err == nil {
t.Errorf("expected an error, but none was reported")
}
if !tt.wantErr && err != nil {
t.Errorf("unexpected error received: %v", err)
}
})
}
}
func Test_assembleConf(t *testing.T) {
tests := []struct {
name string
pod *corev1.Pod
classData string
enableDefaultInternalPlugin bool
wantConfig string
wantErr bool
}{
{
name: "default prometheus settings",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafMetricsPort: "6060",
},
},
},
wantConfig: `
[[inputs.prometheus]]
urls = ["http://127.0.0.1:6060/metrics"]
`,
},
{
name: "default prometheus settings with multiple ports",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafMetricsPorts: "6060,8086",
},
},
},
wantConfig: `
[[inputs.prometheus]]
urls = ["http://127.0.0.1:6060/metrics", "http://127.0.0.1:8086/metrics"]
`,
},
{
name: "default prometheus settings with raw input",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafMetricsPorts: "6060",
TelegrafRawInput: `[global_tags]
dc = "us-east-1"`,
},
},
},
wantConfig: `
[[inputs.prometheus]]
urls = ["http://127.0.0.1:6060/metrics"]
[global_tags]
dc = "us-east-1"
`,
},
{
name: "all prometheus settings with internal",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafMetricsPath: "/metrics/usage",
TelegrafMetricsScheme: "https",
TelegrafInterval: "10s",
TelegrafMetricsPorts: "6060,8086",
TelegrafEnableInternal: "true",
TelegrafMetricVersion: "2",
},
},
},
wantConfig: `
[[inputs.prometheus]]
urls = ["https://127.0.0.1:6060/metrics/usage", "https://127.0.0.1:8086/metrics/usage"]
interval = "10s"
metric_version = 2
[[inputs.internal]]
`,
},
{
name: "default prometheus settings with version, no interval",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafMetricsPorts: "6060",
TelegrafMetricVersion: "2",
},
},
},
wantConfig: `
[[inputs.prometheus]]
urls = ["http://127.0.0.1:6060/metrics"]
metric_version = 2
`,
},
{
name: "invalid metric_version value",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafMetricsPorts: "6060",
TelegrafMetricVersion: "invalid",
},
},
},
wantErr: true,
},
{
name: "valid TOML syntax",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafRawInput: `
[[inputs.exec]]
commands = []
`,
},
},
},
wantConfig: `
[[inputs.exec]]
commands = []
`,
},
{
name: "invalid TOML syntax",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafRawInput: `
[[inputs.invalid]]
"invalid" = invalid
`,
},
},
},
wantErr: true,
},
{
name: "validate enable default internal plugin",
enableDefaultInternalPlugin: true,
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafClass: "default",
},
},
},
wantConfig: `
[[inputs.internal]]
`,
},
{
name: "handle global_tags",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafGlobalTagLiteralPrefix + "foo": "bar",
},
},
},
wantConfig: `[global_tags]
foo = "bar"`,
},
{
name: "handle global_tags multiple",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafGlobalTagLiteralPrefix + "foo": "bar",
TelegrafGlobalTagLiteralPrefix + "baz": "quz",
},
},
},
wantConfig: `[global_tags]
baz = "quz"
foo = "bar"`,
},
{
name: "handle global_tags existing",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafRawInput: "[global_tags]\n a = \"b\"",
TelegrafGlobalTagLiteralPrefix + "foo": "bar",
},
},
},
wantConfig: `[global_tags]
foo = "bar"
a = "b"`,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
handler := &sidecarHandler{
ClassDataHandler: newMockClassDataHandler(map[string]string{"class": tt.classData}),
EnableDefaultInternalPlugin: tt.enableDefaultInternalPlugin,
RequestsCPU: defaultRequestsCPU,
RequestsMemory: defaultRequestsMemory,
LimitsCPU: defaultLimitsCPU,
LimitsMemory: defaultLimitsMemory,
Logger: &logrTesting.TestLogger{T: t},
}
gotConfig, err := handler.assembleConf(tt.pod, "class")
if (err != nil) != tt.wantErr {
t.Errorf("assembleConf() error = %v, wantErr %v", err, tt.wantErr)
return
}
if strings.TrimSpace(gotConfig) != strings.TrimSpace(tt.wantConfig) {
t.Errorf("assembleConf() = %v, want %v", gotConfig, tt.wantConfig)
}
})
}
}
func Test_addSidecars(t *testing.T) {
tests := []struct {
name string
pod *corev1.Pod
enableDefaultInternalPlugin bool
enableIstioInjection bool
telegrafWatchConfig string
istioTelegrafImage string
istioOutputClass string
wantSecrets []string
wantPod string
}{
{
name: "validate prometheus inputs creation",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafMetricsPorts: "6060",
},
},
},
wantSecrets: []string{
`apiVersion: v1
kind: Secret
metadata:
annotations:
app.kubernetes.io/managed-by: telegraf-operator
creationTimestamp: null
labels:
telegraf.influxdata.com/class: default
telegraf.influxdata.com/pod: myname
name: telegraf-config-myname
namespace: mynamespace
stringData:
telegraf.conf: "\n[[inputs.prometheus]]\n urls = [\"http://127.0.0.1:6060/metrics\"]\n \n \n\n"
type: Opaque`,
},
},
{
name: "validate default telegraf pod definition",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafClass: "default",
},
},
},
wantPod: `
metadata:
annotations:
telegraf.influxdata.com/class: default
creationTimestamp: null
spec:
containers:
- command:
- telegraf
- --config
- /etc/telegraf/telegraf.conf
env:
- name: NODENAME
valueFrom:
fieldRef:
fieldPath: spec.nodeName
image: docker.io/library/telegraf:1.22.3
name: telegraf
resources:
limits:
cpu: 200m
memory: 200Mi
requests:
cpu: 10m
memory: 10Mi
volumeMounts:
- mountPath: /etc/telegraf
name: telegraf-config
volumes:
- name: telegraf-config
secret:
secretName: telegraf-config-myname
status: {}
`,
wantSecrets: []string{testEmptySecret},
},
{
name: "validate custom telegraf image pod definition",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafImage: "docker.io/library/telegraf:1.11",
},
},
},
wantPod: `
metadata:
annotations:
telegraf.influxdata.com/image: docker.io/library/telegraf:1.11
creationTimestamp: null
spec:
containers:
- command:
- telegraf
- --config
- /etc/telegraf/telegraf.conf
env:
- name: NODENAME
valueFrom:
fieldRef:
fieldPath: spec.nodeName
image: docker.io/library/telegraf:1.11
name: telegraf
resources:
limits:
cpu: 200m
memory: 200Mi
requests:
cpu: 10m
memory: 10Mi
volumeMounts:
- mountPath: /etc/telegraf
name: telegraf-config
volumes:
- name: telegraf-config
secret:
secretName: telegraf-config-myname
status: {}
`,
wantSecrets: []string{testEmptySecret},
},
{
name: "validate enable default internal plugin",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafClass: "default",
},
},
},
enableDefaultInternalPlugin: true,
wantSecrets: []string{
`apiVersion: v1
kind: Secret
metadata:
annotations:
app.kubernetes.io/managed-by: telegraf-operator
creationTimestamp: null
labels:
telegraf.influxdata.com/class: default
telegraf.influxdata.com/pod: myname
name: telegraf-config-myname
namespace: mynamespace
stringData:
telegraf.conf: |2+
[[inputs.internal]]
type: Opaque`,
},
},
{
name: "validate custom resources and limits",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafRequestsCPU: "100m",
TelegrafRequestsMemory: "100Mi",
TelegrafLimitsCPU: "400m",
TelegrafLimitsMemory: "400Mi",
},
},
},
wantPod: `
metadata:
annotations:
telegraf.influxdata.com/limits-cpu: 400m
telegraf.influxdata.com/limits-memory: 400Mi
telegraf.influxdata.com/requests-cpu: 100m
telegraf.influxdata.com/requests-memory: 100Mi
creationTimestamp: null
spec:
containers:
- command:
- telegraf
- --config
- /etc/telegraf/telegraf.conf
env:
- name: NODENAME
valueFrom:
fieldRef:
fieldPath: spec.nodeName
image: docker.io/library/telegraf:1.22.3
name: telegraf
resources:
limits:
cpu: 400m
memory: 400Mi
requests:
cpu: 100m
memory: 100Mi
volumeMounts:
- mountPath: /etc/telegraf
name: telegraf-config
volumes:
- name: telegraf-config
secret:
secretName: telegraf-config-myname
status: {}
`,
wantSecrets: []string{testEmptySecret},
},
{
name: "validate incorrect resources to fallback default resources",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafRequestsCPU: "100x",
TelegrafLimitsCPU: "750m",
},
},
},
wantPod: `
metadata:
annotations:
telegraf.influxdata.com/limits-cpu: 750m
telegraf.influxdata.com/requests-cpu: 100x
creationTimestamp: null
spec:
containers:
- command:
- telegraf
- --config
- /etc/telegraf/telegraf.conf
env:
- name: NODENAME
valueFrom:
fieldRef:
fieldPath: spec.nodeName
image: docker.io/library/telegraf:1.22.3
name: telegraf
resources:
limits:
cpu: 750m
memory: 200Mi
requests:
cpu: 10m
memory: 10Mi
volumeMounts:
- mountPath: /etc/telegraf
name: telegraf-config
volumes:
- name: telegraf-config
secret:
secretName: telegraf-config-myname
status: {}
`,
wantSecrets: []string{testEmptySecret},
},
{
name: "validate incorrect resources to fallback default resources",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafRequestsCPU: "100x",
TelegrafLimitsCPU: "750m",
},
},
},
wantPod: `
metadata:
annotations:
telegraf.influxdata.com/limits-cpu: 750m
telegraf.influxdata.com/requests-cpu: 100x
creationTimestamp: null
spec:
containers:
- command:
- telegraf
- --config
- /etc/telegraf/telegraf.conf
env:
- name: NODENAME
valueFrom:
fieldRef:
fieldPath: spec.nodeName
image: docker.io/library/telegraf:1.22.3
name: telegraf
resources:
limits:
cpu: 750m
memory: 200Mi
requests:
cpu: 10m
memory: 10Mi
volumeMounts:
- mountPath: /etc/telegraf
name: telegraf-config
volumes:
- name: telegraf-config
secret:
secretName: telegraf-config-myname
status: {}
`,
wantSecrets: []string{testEmptySecret},
},
{
name: "does not add telegraf sidecar when container already exists",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafClass: "default",
},
},
Spec: corev1.PodSpec{
Containers: []corev1.Container{
{
Name: "telegraf",
Image: "alpine:latest",
},
},
},
},
wantPod: `
metadata:
annotations:
telegraf.influxdata.com/class: default
creationTimestamp: null
spec:
containers:
- image: alpine:latest
name: telegraf
resources: {}
status: {}
`,
wantSecrets: []string{},
},
{
name: "does not add istio sidecar when not enabled",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
IstioSidecarAnnotation: "dummy",
},
},
},
wantPod: `
metadata:
annotations:
sidecar.istio.io/status: dummy
creationTimestamp: null
spec:
containers: null
status: {}
`,
wantSecrets: []string{},
},
{
name: "adds istio sidecar when sidecar annotation enabled and istio injection enabled",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
IstioSidecarAnnotation: "dummy",
},
},
},
enableIstioInjection: true,
istioOutputClass: "istio",
wantPod: `
metadata:
annotations:
sidecar.istio.io/status: dummy
creationTimestamp: null
spec:
containers:
- command:
- telegraf
- --config
- /etc/telegraf/telegraf.conf
env:
- name: NODENAME
valueFrom:
fieldRef:
fieldPath: spec.nodeName
image: docker.io/library/telegraf:1.22.3
name: telegraf-istio
resources:
limits:
cpu: 200m
memory: 200Mi
requests:
cpu: 10m
memory: 10Mi
volumeMounts:
- mountPath: /etc/telegraf
name: telegraf-istio-config
volumes:
- name: telegraf-istio-config
secret:
secretName: telegraf-istio-config-myname
status: {}
`,
wantSecrets: []string{testEmptyIstioSecret},
},
{
name: "does not add istio sidecar when container already exists",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
IstioSidecarAnnotation: "dummy",
},
},
Spec: corev1.PodSpec{
Containers: []corev1.Container{
{
Name: "telegraf-istio",
Image: "alpine:latest",
},
},
},
},
enableIstioInjection: true,
istioOutputClass: "istio",
wantPod: `
metadata:
annotations:
sidecar.istio.io/status: dummy
creationTimestamp: null
spec:
containers:
- image: alpine:latest
name: telegraf-istio
resources: {}
status: {}
`,
wantSecrets: []string{},
},
{
name: "adds istio sidecar when sidecar annotation enabled and istio injection enabled",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
IstioSidecarAnnotation: "dummy",
},
},
},
enableIstioInjection: true,
istioTelegrafImage: "docker.io/library/telegraf:1.11",
istioOutputClass: "istio",
wantPod: `
metadata:
annotations:
sidecar.istio.io/status: dummy
creationTimestamp: null
spec:
containers:
- command:
- telegraf
- --config
- /etc/telegraf/telegraf.conf
env:
- name: NODENAME
valueFrom:
fieldRef:
fieldPath: spec.nodeName
image: docker.io/library/telegraf:1.11
name: telegraf-istio
resources:
limits:
cpu: 200m
memory: 200Mi
requests:
cpu: 10m
memory: 10Mi
volumeMounts:
- mountPath: /etc/telegraf
name: telegraf-istio-config
volumes:
- name: telegraf-istio-config
secret:
secretName: telegraf-istio-config-myname
status: {}
`,
wantSecrets: []string{testEmptyIstioSecret},
},
{
name: "adds both regular telegraf and istio sidecars when sidecar annotation enabled and istio injection enabled",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
IstioSidecarAnnotation: "dummy",
TelegrafClass: "default",
},
},
},
enableIstioInjection: true,
istioOutputClass: "istio",
wantPod: `
metadata:
annotations:
sidecar.istio.io/status: dummy
telegraf.influxdata.com/class: default
creationTimestamp: null
spec:
containers:
- command:
- telegraf
- --config
- /etc/telegraf/telegraf.conf
env:
- name: NODENAME
valueFrom:
fieldRef:
fieldPath: spec.nodeName
image: docker.io/library/telegraf:1.22.3
name: telegraf
resources:
limits:
cpu: 200m
memory: 200Mi
requests:
cpu: 10m
memory: 10Mi
volumeMounts:
- mountPath: /etc/telegraf
name: telegraf-config
- command:
- telegraf
- --config
- /etc/telegraf/telegraf.conf
env:
- name: NODENAME
valueFrom:
fieldRef:
fieldPath: spec.nodeName
image: docker.io/library/telegraf:1.22.3
name: telegraf-istio
resources:
limits:
cpu: 200m
memory: 200Mi
requests:
cpu: 10m
memory: 10Mi
volumeMounts:
- mountPath: /etc/telegraf
name: telegraf-istio-config
volumes:
- name: telegraf-config
secret:
secretName: telegraf-config-myname
- name: telegraf-istio-config
secret:
secretName: telegraf-istio-config-myname
status: {}
`,
wantSecrets: []string{testEmptySecret, testEmptyIstioSecret},
},
{
name: "sets config-watch value if specified",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafClass: "default",
},
},
},
enableIstioInjection: true,
istioOutputClass: "istio",
telegrafWatchConfig: "inotify",
wantPod: `
metadata:
annotations:
telegraf.influxdata.com/class: default
creationTimestamp: null
spec:
containers:
- command:
- telegraf
- --config
- /etc/telegraf/telegraf.conf
- --watch-config
- inotify
env:
- name: NODENAME
valueFrom:
fieldRef:
fieldPath: spec.nodeName
image: docker.io/library/telegraf:1.22.3
name: telegraf
resources:
limits:
cpu: 200m
memory: 200Mi
requests:
cpu: 10m
memory: 10Mi
volumeMounts:
- mountPath: /etc/telegraf
name: telegraf-config
volumes:
- name: telegraf-config
secret:
secretName: telegraf-config-myname
status: {}
`,
wantSecrets: []string{testEmptySecret},
},
{
name: "validate secret-env annotation usage creation",
pod: &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
TelegrafSecretEnv: "mysecret",