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nginx_test.go
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// Copyright The OpenTelemetry 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.
package instrumentation
import (
"testing"
"github.com/go-logr/logr"
"github.com/stretchr/testify/assert"
semconv "go.opentelemetry.io/otel/semconv/v1.7.0"
corev1 "k8s.io/api/core/v1"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"github.com/open-telemetry/opentelemetry-operator/apis/v1alpha1"
)
var nginxSdkInitContainerTestCommand = "echo -e $OTEL_NGINX_I13N_SCRIPT > /opt/opentelemetry-webserver/agent/nginx_instrumentation.sh && chmod +x /opt/opentelemetry-webserver/agent/nginx_instrumentation.sh && cat /opt/opentelemetry-webserver/agent/nginx_instrumentation.sh && /opt/opentelemetry-webserver/agent/nginx_instrumentation.sh \"/opt/opentelemetry-webserver/agent\" \"/opt/opentelemetry-webserver/source-conf\" \"nginx.conf\" \"<<SID-PLACEHOLDER>>\""
var nginxSdkInitContainerTestCommandCustomFile = "echo -e $OTEL_NGINX_I13N_SCRIPT > /opt/opentelemetry-webserver/agent/nginx_instrumentation.sh && chmod +x /opt/opentelemetry-webserver/agent/nginx_instrumentation.sh && cat /opt/opentelemetry-webserver/agent/nginx_instrumentation.sh && /opt/opentelemetry-webserver/agent/nginx_instrumentation.sh \"/opt/opentelemetry-webserver/agent\" \"/opt/opentelemetry-webserver/source-conf\" \"custom-nginx.conf\" \"<<SID-PLACEHOLDER>>\""
var nginxSdkInitContainerI13nScript = "\nNGINX_AGENT_DIR_FULL=$1\t\\n\nNGINX_AGENT_CONF_DIR_FULL=$2 \\n\nNGINX_CONFIG_FILE=$3 \\n\nNGINX_SID_PLACEHOLDER=$4 \\n\nNGINX_SID_VALUE=$5 \\n\necho \"Input Parameters: $@\" \\n\nset -x \\n\n\\n\ncp -r /opt/opentelemetry/* ${NGINX_AGENT_DIR_FULL} \\n\n\\n\nNGINX_VERSION=$(cat ${NGINX_AGENT_CONF_DIR_FULL}/version.txt) \\n\nNGINX_AGENT_LOG_DIR=$(echo \"${NGINX_AGENT_DIR_FULL}/logs\" | sed 's,/,\\\\/,g') \\n\n\\n\ncat ${NGINX_AGENT_DIR_FULL}/conf/opentelemetry_sdk_log4cxx.xml.template | sed 's,__agent_log_dir__,'${NGINX_AGENT_LOG_DIR}',g' > ${NGINX_AGENT_DIR_FULL}/conf/opentelemetry_sdk_log4cxx.xml \\n\necho -e $OTEL_NGINX_AGENT_CONF > ${NGINX_AGENT_CONF_DIR_FULL}/opentelemetry_agent.conf \\n\nsed -i \"s,${NGINX_SID_PLACEHOLDER},${OTEL_NGINX_SERVICE_INSTANCE_ID},g\" ${NGINX_AGENT_CONF_DIR_FULL}/opentelemetry_agent.conf \\n\nsed -i \"1s,^,load_module ${NGINX_AGENT_DIR_FULL}/WebServerModule/Nginx/${NGINX_VERSION}/ngx_http_opentelemetry_module.so;\\\\n,g\" ${NGINX_AGENT_CONF_DIR_FULL}/${NGINX_CONFIG_FILE} \\n\nsed -i \"1s,^,env OTEL_RESOURCE_ATTRIBUTES;\\\\n,g\" ${NGINX_AGENT_CONF_DIR_FULL}/${NGINX_CONFIG_FILE} \\n\nmv ${NGINX_AGENT_CONF_DIR_FULL}/opentelemetry_agent.conf ${NGINX_AGENT_CONF_DIR_FULL}/conf.d \\n\n\t\t"
func TestInjectNginxSDK(t *testing.T) {
tests := []struct {
name string
v1alpha1.Nginx
pod corev1.Pod
expected corev1.Pod
}{
{
name: "Clone Container not present",
Nginx: v1alpha1.Nginx{
Image: "foo/bar:1",
Attrs: []corev1.EnvVar{
{
Name: "NginxModuleOtelMaxQueueSize",
Value: "4096",
},
},
},
pod: corev1.Pod{
Spec: corev1.PodSpec{
Containers: []corev1.Container{
{},
},
},
ObjectMeta: v1.ObjectMeta{
Name: "my-nginx-6c44bcbdd",
},
},
expected: corev1.Pod{
ObjectMeta: v1.ObjectMeta{
Name: "my-nginx-6c44bcbdd",
},
Spec: corev1.PodSpec{
Volumes: []corev1.Volume{
{
Name: nginxAgentConfigVolume,
VolumeSource: corev1.VolumeSource{
EmptyDir: &corev1.EmptyDirVolumeSource{},
},
},
{
Name: nginxAgentVolume,
VolumeSource: corev1.VolumeSource{
EmptyDir: &corev1.EmptyDirVolumeSource{},
},
},
},
InitContainers: []corev1.Container{
{
Name: nginxAgentCloneContainerName,
Image: "",
Command: []string{"/bin/sh", "-c"},
Args: []string{"cp -r /etc/nginx/* /opt/opentelemetry-webserver/source-conf && export NGINX_VERSION=$( { nginx -v ; } 2>&1 ) && echo ${NGINX_VERSION##*/} > /opt/opentelemetry-webserver/source-conf/version.txt"},
VolumeMounts: []corev1.VolumeMount{{
Name: nginxAgentConfigVolume,
MountPath: nginxAgentConfDirFull,
}},
},
{
Name: nginxAgentInitContainerName,
Image: "foo/bar:1",
Command: []string{"/bin/sh", "-c"},
Args: []string{nginxSdkInitContainerTestCommand},
Env: []corev1.EnvVar{
{
Name: nginxAttributesEnvVar,
Value: "NginxModuleEnabled ON;\nNginxModuleOtelExporterEndpoint http://otlp-endpoint:4317;\nNginxModuleOtelMaxQueueSize 4096;\nNginxModuleOtelSpanExporter otlp;\nNginxModuleResolveBackends ON;\nNginxModuleServiceInstanceId <<SID-PLACEHOLDER>>;\nNginxModuleServiceName nginx-service-name;\nNginxModuleServiceNamespace req-namespace;\nNginxModuleTraceAsError ON;\n",
},
{
Name: "OTEL_NGINX_I13N_SCRIPT",
Value: nginxSdkInitContainerI13nScript,
},
{
Name: nginxServiceInstanceIdEnvVar,
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
FieldPath: "metadata.name",
},
},
},
},
VolumeMounts: []corev1.VolumeMount{
{
Name: nginxAgentVolume,
MountPath: nginxAgentDirFull,
},
{
Name: nginxAgentConfigVolume,
MountPath: nginxAgentConfDirFull,
},
},
},
},
Containers: []corev1.Container{
{
VolumeMounts: []corev1.VolumeMount{
{
Name: nginxAgentVolume,
MountPath: nginxAgentDirFull,
},
{
Name: nginxAgentConfigVolume,
MountPath: "/etc/nginx",
},
},
Env: []corev1.EnvVar{
{
Name: "LD_LIBRARY_PATH",
Value: "/opt/opentelemetry-webserver/agent/sdk_lib/lib",
},
},
},
},
},
},
},
// === Test ConfigFile configuration =============================
{
name: "ConfigFile honored",
Nginx: v1alpha1.Nginx{
Image: "foo/bar:1",
ConfigFile: "/opt/nginx/custom-nginx.conf",
},
pod: corev1.Pod{
ObjectMeta: v1.ObjectMeta{
Name: "my-nginx-6c44bcbdd",
},
Spec: corev1.PodSpec{
Containers: []corev1.Container{
{},
},
},
},
expected: corev1.Pod{
ObjectMeta: v1.ObjectMeta{
Name: "my-nginx-6c44bcbdd",
},
Spec: corev1.PodSpec{
Volumes: []corev1.Volume{
{
Name: nginxAgentConfigVolume,
VolumeSource: corev1.VolumeSource{
EmptyDir: &corev1.EmptyDirVolumeSource{},
},
},
{
Name: nginxAgentVolume,
VolumeSource: corev1.VolumeSource{
EmptyDir: &corev1.EmptyDirVolumeSource{},
},
},
},
InitContainers: []corev1.Container{
{
Name: nginxAgentCloneContainerName,
Image: "",
Command: []string{"/bin/sh", "-c"},
Args: []string{"cp -r /opt/nginx/* /opt/opentelemetry-webserver/source-conf && export NGINX_VERSION=$( { nginx -v ; } 2>&1 ) && echo ${NGINX_VERSION##*/} > /opt/opentelemetry-webserver/source-conf/version.txt"},
VolumeMounts: []corev1.VolumeMount{{
Name: nginxAgentConfigVolume,
MountPath: nginxAgentConfDirFull,
}},
},
{
Name: nginxAgentInitContainerName,
Image: "foo/bar:1",
Command: []string{"/bin/sh", "-c"},
Args: []string{nginxSdkInitContainerTestCommandCustomFile},
Env: []corev1.EnvVar{
{
Name: nginxAttributesEnvVar,
Value: "NginxModuleEnabled ON;\nNginxModuleOtelExporterEndpoint http://otlp-endpoint:4317;\nNginxModuleOtelSpanExporter otlp;\nNginxModuleResolveBackends ON;\nNginxModuleServiceInstanceId <<SID-PLACEHOLDER>>;\nNginxModuleServiceName nginx-service-name;\nNginxModuleServiceNamespace req-namespace;\nNginxModuleTraceAsError ON;\n",
},
{
Name: "OTEL_NGINX_I13N_SCRIPT",
Value: nginxSdkInitContainerI13nScript,
},
{
Name: nginxServiceInstanceIdEnvVar,
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
FieldPath: "metadata.name",
},
},
},
},
VolumeMounts: []corev1.VolumeMount{
{
Name: nginxAgentVolume,
MountPath: nginxAgentDirFull,
},
{
Name: nginxAgentConfigVolume,
MountPath: nginxAgentConfDirFull,
},
},
},
},
Containers: []corev1.Container{
{
VolumeMounts: []corev1.VolumeMount{
{
Name: nginxAgentVolume,
MountPath: nginxAgentDirFull,
},
{
Name: nginxAgentConfigVolume,
MountPath: "/opt/nginx",
},
},
Env: []corev1.EnvVar{
{
Name: "LD_LIBRARY_PATH",
Value: "/opt/opentelemetry-webserver/agent/sdk_lib/lib",
},
},
},
},
},
}},
// === Test Removal of probes and lifecycle =============================
{
name: "Probes removed on clone init container",
Nginx: v1alpha1.Nginx{
Image: "foo/bar:1",
},
pod: corev1.Pod{
ObjectMeta: v1.ObjectMeta{
Name: "my-nginx-6c44bcbdd",
},
Spec: corev1.PodSpec{
Containers: []corev1.Container{
{
ReadinessProbe: &corev1.Probe{},
StartupProbe: &corev1.Probe{},
LivenessProbe: &corev1.Probe{},
Lifecycle: &corev1.Lifecycle{},
},
},
},
},
expected: corev1.Pod{
ObjectMeta: v1.ObjectMeta{
Name: "my-nginx-6c44bcbdd",
},
Spec: corev1.PodSpec{
Volumes: []corev1.Volume{
{
Name: nginxAgentConfigVolume,
VolumeSource: corev1.VolumeSource{
EmptyDir: &corev1.EmptyDirVolumeSource{},
},
},
{
Name: nginxAgentVolume,
VolumeSource: corev1.VolumeSource{
EmptyDir: &corev1.EmptyDirVolumeSource{},
},
},
},
InitContainers: []corev1.Container{
{
Name: nginxAgentCloneContainerName,
Image: "",
Command: []string{"/bin/sh", "-c"},
Args: []string{"cp -r /etc/nginx/* /opt/opentelemetry-webserver/source-conf && export NGINX_VERSION=$( { nginx -v ; } 2>&1 ) && echo ${NGINX_VERSION##*/} > /opt/opentelemetry-webserver/source-conf/version.txt"},
VolumeMounts: []corev1.VolumeMount{{
Name: nginxAgentConfigVolume,
MountPath: nginxAgentConfDirFull,
}},
},
{
Name: nginxAgentInitContainerName,
Image: "foo/bar:1",
Command: []string{"/bin/sh", "-c"},
Args: []string{nginxSdkInitContainerTestCommand},
Env: []corev1.EnvVar{
{
Name: nginxAttributesEnvVar,
Value: "NginxModuleEnabled ON;\nNginxModuleOtelExporterEndpoint http://otlp-endpoint:4317;\nNginxModuleOtelSpanExporter otlp;\nNginxModuleResolveBackends ON;\nNginxModuleServiceInstanceId <<SID-PLACEHOLDER>>;\nNginxModuleServiceName nginx-service-name;\nNginxModuleServiceNamespace req-namespace;\nNginxModuleTraceAsError ON;\n",
},
{
Name: "OTEL_NGINX_I13N_SCRIPT",
Value: nginxSdkInitContainerI13nScript,
},
{
Name: nginxServiceInstanceIdEnvVar,
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
FieldPath: "metadata.name",
},
},
},
},
VolumeMounts: []corev1.VolumeMount{
{
Name: nginxAgentVolume,
MountPath: nginxAgentDirFull,
},
{
Name: nginxAgentConfigVolume,
MountPath: nginxAgentConfDirFull,
},
},
},
},
Containers: []corev1.Container{
{
VolumeMounts: []corev1.VolumeMount{
{
Name: nginxAgentVolume,
MountPath: nginxAgentDirFull,
},
{
Name: nginxAgentConfigVolume,
MountPath: "/etc/nginx",
},
},
ReadinessProbe: &corev1.Probe{},
StartupProbe: &corev1.Probe{},
LivenessProbe: &corev1.Probe{},
Lifecycle: &corev1.Lifecycle{},
Env: []corev1.EnvVar{
{
Name: "LD_LIBRARY_PATH",
Value: "/opt/opentelemetry-webserver/agent/sdk_lib/lib",
},
},
},
},
},
},
},
// Pod Namespace specified
{
name: "Pod Namespace specified",
Nginx: v1alpha1.Nginx{Image: "foo/bar:1"},
pod: corev1.Pod{
ObjectMeta: v1.ObjectMeta{
Namespace: "my-namespace",
Name: "my-nginx-6c44bcbdd",
},
Spec: corev1.PodSpec{
Containers: []corev1.Container{
{},
},
},
},
expected: corev1.Pod{
ObjectMeta: v1.ObjectMeta{
Namespace: "my-namespace",
Name: "my-nginx-6c44bcbdd",
},
Spec: corev1.PodSpec{
Volumes: []corev1.Volume{
{
Name: nginxAgentConfigVolume,
VolumeSource: corev1.VolumeSource{
EmptyDir: &corev1.EmptyDirVolumeSource{},
},
},
{
Name: nginxAgentVolume,
VolumeSource: corev1.VolumeSource{
EmptyDir: &corev1.EmptyDirVolumeSource{},
},
},
},
InitContainers: []corev1.Container{
{
Name: nginxAgentCloneContainerName,
Image: "",
Command: []string{"/bin/sh", "-c"},
Args: []string{"cp -r /etc/nginx/* /opt/opentelemetry-webserver/source-conf && export NGINX_VERSION=$( { nginx -v ; } 2>&1 ) && echo ${NGINX_VERSION##*/} > /opt/opentelemetry-webserver/source-conf/version.txt"},
VolumeMounts: []corev1.VolumeMount{{
Name: nginxAgentConfigVolume,
MountPath: nginxAgentConfDirFull,
}},
},
{
Name: nginxAgentInitContainerName,
Image: "foo/bar:1",
Command: []string{"/bin/sh", "-c"},
Args: []string{nginxSdkInitContainerTestCommand},
Env: []corev1.EnvVar{
{
Name: nginxAttributesEnvVar,
Value: "NginxModuleEnabled ON;\nNginxModuleOtelExporterEndpoint http://otlp-endpoint:4317;\nNginxModuleOtelSpanExporter otlp;\nNginxModuleResolveBackends ON;\nNginxModuleServiceInstanceId <<SID-PLACEHOLDER>>;\nNginxModuleServiceName nginx-service-name;\nNginxModuleServiceNamespace my-namespace;\nNginxModuleTraceAsError ON;\n",
},
{
Name: "OTEL_NGINX_I13N_SCRIPT",
Value: nginxSdkInitContainerI13nScript,
},
{
Name: nginxServiceInstanceIdEnvVar,
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
FieldPath: "metadata.name",
},
},
},
},
VolumeMounts: []corev1.VolumeMount{
{
Name: nginxAgentVolume,
MountPath: nginxAgentDirFull,
},
{
Name: nginxAgentConfigVolume,
MountPath: nginxAgentConfDirFull,
},
},
},
},
Containers: []corev1.Container{
{
VolumeMounts: []corev1.VolumeMount{
{
Name: nginxAgentVolume,
MountPath: nginxAgentDirFull,
},
{
Name: nginxAgentConfigVolume,
MountPath: "/etc/nginx",
},
},
Env: []corev1.EnvVar{
{
Name: "LD_LIBRARY_PATH",
Value: "/opt/opentelemetry-webserver/agent/sdk_lib/lib",
},
},
},
},
},
},
},
}
resourceMap := map[string]string{
string(semconv.K8SDeploymentNameKey): "nginx-service-name",
string(semconv.K8SNamespaceNameKey): "req-namespace",
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
pod := injectNginxSDK(logr.Discard(), test.Nginx, test.pod, false, 0, "http://otlp-endpoint:4317", resourceMap)
assert.Equal(t, test.expected, pod)
})
}
}
func TestInjectNginxUnknownNamespace(t *testing.T) {
tests := []struct {
name string
v1alpha1.Nginx
pod corev1.Pod
expected corev1.Pod
}{
{
name: "Clone Container not present, unknown namespace",
Nginx: v1alpha1.Nginx{Image: "foo/bar:1"},
pod: corev1.Pod{
ObjectMeta: v1.ObjectMeta{
Name: "my-nginx-6c44bcbdd",
},
Spec: corev1.PodSpec{
Containers: []corev1.Container{
{},
},
},
},
expected: corev1.Pod{
ObjectMeta: v1.ObjectMeta{
Name: "my-nginx-6c44bcbdd",
},
Spec: corev1.PodSpec{
Volumes: []corev1.Volume{
{
Name: nginxAgentConfigVolume,
VolumeSource: corev1.VolumeSource{
EmptyDir: &corev1.EmptyDirVolumeSource{},
},
},
{
Name: nginxAgentVolume,
VolumeSource: corev1.VolumeSource{
EmptyDir: &corev1.EmptyDirVolumeSource{},
},
},
},
InitContainers: []corev1.Container{
{
Name: nginxAgentCloneContainerName,
Image: "",
Command: []string{"/bin/sh", "-c"},
Args: []string{"cp -r /etc/nginx/* /opt/opentelemetry-webserver/source-conf && export NGINX_VERSION=$( { nginx -v ; } 2>&1 ) && echo ${NGINX_VERSION##*/} > /opt/opentelemetry-webserver/source-conf/version.txt"},
VolumeMounts: []corev1.VolumeMount{{
Name: nginxAgentConfigVolume,
MountPath: nginxAgentConfDirFull,
}},
},
{
Name: nginxAgentInitContainerName,
Image: "foo/bar:1",
Command: []string{"/bin/sh", "-c"},
Args: []string{nginxSdkInitContainerTestCommand},
Env: []corev1.EnvVar{
{
Name: nginxAttributesEnvVar,
Value: "NginxModuleEnabled ON;\nNginxModuleOtelExporterEndpoint http://otlp-endpoint:4317;\nNginxModuleOtelSpanExporter otlp;\nNginxModuleResolveBackends ON;\nNginxModuleServiceInstanceId <<SID-PLACEHOLDER>>;\nNginxModuleServiceName nginx-service-name;\nNginxModuleServiceNamespace nginx;\nNginxModuleTraceAsError ON;\n",
},
{
Name: "OTEL_NGINX_I13N_SCRIPT",
Value: nginxSdkInitContainerI13nScript,
},
{
Name: nginxServiceInstanceIdEnvVar,
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
FieldPath: "metadata.name",
},
},
},
},
VolumeMounts: []corev1.VolumeMount{
{
Name: nginxAgentVolume,
MountPath: nginxAgentDirFull,
},
{
Name: nginxAgentConfigVolume,
MountPath: nginxAgentConfDirFull,
},
},
},
},
Containers: []corev1.Container{
{
VolumeMounts: []corev1.VolumeMount{
{
Name: nginxAgentVolume,
MountPath: nginxAgentDirFull,
},
{
Name: nginxAgentConfigVolume,
MountPath: "/etc/nginx",
},
},
Env: []corev1.EnvVar{
{
Name: "LD_LIBRARY_PATH",
Value: "/opt/opentelemetry-webserver/agent/sdk_lib/lib",
},
},
},
},
},
},
},
}
resourceMap := map[string]string{
string(semconv.K8SDeploymentNameKey): "nginx-service-name",
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
pod := injectNginxSDK(logr.Discard(), test.Nginx, test.pod, false, 0, "http://otlp-endpoint:4317", resourceMap)
assert.Equal(t, test.expected, pod)
})
}
}
func TestNginxInitContainerMissing(t *testing.T) {
tests := []struct {
name string
pod corev1.Pod
expected bool
}{
{
name: "InitContainer_Already_Inject",
pod: corev1.Pod{
Spec: corev1.PodSpec{
InitContainers: []corev1.Container{
{
Name: "istio-init",
},
{
Name: nginxAgentInitContainerName,
},
},
},
},
expected: false,
},
{
name: "InitContainer_Absent_1",
pod: corev1.Pod{
Spec: corev1.PodSpec{
InitContainers: []corev1.Container{
{
Name: "istio-init",
},
},
},
},
expected: true,
},
{
name: "InitContainer_Absent_2",
pod: corev1.Pod{
Spec: corev1.PodSpec{},
},
expected: true,
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
result := isNginxInitContainerMissing(test.pod, nginxAgentInitContainerName)
assert.Equal(t, test.expected, result)
})
}
}