Add env var and env config source integration tests

tests/general/envvar_expansion_test.go

@@ -0,0 +1,90 @@
+// Copyright Splunk, Inc.
+//
+// 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 tests
+
+import (
+	"os"
+	"path"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/signalfx/splunk-otel-collector/tests/testutils"
+)
+
+func TestExpandedDollarSignsViaStandardEnvVar(t *testing.T) {
+	tc := testutils.NewTestcase(t)
+	defer tc.PrintLogsOnFailure()
+	defer tc.ShutdownOTLPMetricsReceiverSink()
+
+	image := os.Getenv("SPLUNK_OTEL_COLLECTOR_IMAGE")
+	if strings.TrimSpace(image) == "" {
+		t.Skipf("skipping container-only test")
+	}
+
+	hostMetricsEnvVars := map[string]string{
+		"OTLP_ENDPOINT":  tc.OTLPEndpoint,
+		"SPLUNK_TEST_ID": tc.ID,
+		"AN_ENVVAR":      "an-envvar-value"}
+
+	collector, err := testutils.NewCollectorContainer().
+		WithImage(image).
+		WithEnv(hostMetricsEnvVars).
+		WithConfigPath(path.Join(".", "testdata", "envvar_labels.yaml")).
+		WithLogger(tc.Logger).
+		Build()
+
+	require.NoError(t, err)
+	require.NotNil(t, collector)
+	require.NoError(t, collector.Start())
+	defer func() { require.NoError(t, collector.Shutdown()) }()
+
+	expectedResourceMetrics := tc.ResourceMetrics("envvar_labels.yaml")
+	require.NoError(t, tc.OTLPMetricsReceiverSink.AssertAllMetricsReceived(t, *expectedResourceMetrics, 30*time.Second))
+}
+
+
+func TestExpandedDollarSignsViaEnvConfigSource(t *testing.T) {
+	tc := testutils.NewTestcase(t)
+	defer tc.PrintLogsOnFailure()
+	defer tc.ShutdownOTLPMetricsReceiverSink()
+
+	image := os.Getenv("SPLUNK_OTEL_COLLECTOR_IMAGE")
+	if strings.TrimSpace(image) == "" {
+		t.Skipf("skipping container-only test")
+	}
+
+	hostMetricsEnvVars := map[string]string{
+		"OTLP_ENDPOINT":  tc.OTLPEndpoint,
+		"SPLUNK_TEST_ID": tc.ID,
+		"AN_ENVVAR":      "an-envvar-value"}
+
+	collector, err := testutils.NewCollectorContainer().
+		WithImage(image).
+		WithEnv(hostMetricsEnvVars).
+		WithConfigPath(path.Join(".", "testdata", "env_config_source_labels.yaml")).
+		WithLogger(tc.Logger).
+		Build()
+
+	require.NoError(t, err)
+	require.NotNil(t, collector)
+	require.NoError(t, collector.Start())
+	defer func() { require.NoError(t, collector.Shutdown()) }()
+
+	expectedResourceMetrics := tc.ResourceMetrics("env_config_source_labels.yaml")
+	require.NoError(t, tc.OTLPMetricsReceiverSink.AssertAllMetricsReceived(t, *expectedResourceMetrics, 30*time.Second))
+}

tests/general/testdata/env_config_source_labels.yaml

@@ -0,0 +1,66 @@
+config_sources:
+  env:
+
+receivers:
+  hostmetrics:
+    collection_interval: 2s
+    scrapers:
+      memory:
+processors:
+  filter:
+    metrics:
+      include:
+        match_type: strict
+        metric_names:
+          - system.memory.usage
+  metricstransform:
+    transforms:
+      - action: update
+        include: .*
+        match_type: regexp
+        operations:
+          - action: add_label
+            new_label: single-dollar
+            new_value: ${env:AN_ENVVAR}-suffix
+          - action: add_label
+            new_label: double-dollar
+            new_value: $${env:AN_ENVVAR}-suffix
+          - action: add_label
+            new_label: triple-dollar
+            new_value: $$${env:AN_ENVVAR}-suffix
+          - action: add_label
+            new_label: quadruple-dollar
+            new_value: $$$${env:AN_ENVVAR}-suffix
+          - action: add_label
+            new_label: quintuple-dollar
+            new_value: $$$$${env:AN_ENVVAR}-suffix
+          - action: add_label
+            new_label: sextuple-dollar
+            new_value: $$$$$${env:AN_ENVVAR}-suffix
+          - action: add_label
+            new_label: septuple-dollar
+            new_value: $$$$$$${env:AN_ENVVAR}-suffix
+          - action: add_label
+            new_label: octuple-dollar
+            new_value: $$$$$$$${env:AN_ENVVAR}-suffix
+          - action: add_label
+            new_label: nonuple-dollar
+            new_value: $$$$$$$$${env:AN_ENVVAR}-suffix
+          - action: add_label
+            new_label: decuple-dollar
+            new_value: $$$$$$$$$${env:AN_ENVVAR}-suffix
+
+exporters:
+  otlp:
+    endpoint: "${OTLP_ENDPOINT}"
+    insecure: true
+service:
+  pipelines:
+    metrics:
+      receivers:
+        - hostmetrics
+      processors:
+        - filter
+        - metricstransform
+      exporters:
+        - otlp

tests/general/testdata/envvar_labels.yaml

@@ -0,0 +1,93 @@
+receivers:
+  hostmetrics:
+    collection_interval: 2s
+    scrapers:
+      memory:
+processors:
+  filter:
+    metrics:
+      include:
+        match_type: strict
+        metric_names:
+          - system.memory.usage
+  metricstransform:
+    transforms:
+      - action: update
+        include: .*
+        match_type: regexp
+        operations:
+          - action: add_label
+            new_label: single-dollar-no-curly-braces
+            new_value: $AN_ENVVAR-suffix
+          - action: add_label
+            new_label: single-dollar-curly-braces
+            new_value: ${AN_ENVVAR}-suffix
+          - action: add_label
+            new_label: double-dollar-no-curly-braces
+            new_value: $$AN_ENVVAR-suffix
+          - action: add_label
+            new_label: double-dollar-curly-braces
+            new_value: $${AN_ENVVAR}-suffix
+          - action: add_label
+            new_label: triple-dollar-no-curly-braces
+            new_value: $$$AN_ENVVAR-suffix
+          - action: add_label
+            new_label: triple-dollar-curly-braces
+            new_value: $$${AN_ENVVAR}-suffix
+          - action: add_label
+            new_label: quadruple-dollar-no-curly-braces
+            new_value: $$$$AN_ENVVAR-suffix
+          - action: add_label
+            new_label: quadruple-dollar-curly-braces
+            new_value: $$$${AN_ENVVAR}-suffix
+          - action: add_label
+            new_label: quintuple-dollar-no-curly-braces
+            new_value: $$$$$AN_ENVVAR-suffix
+          - action: add_label
+            new_label: quintuple-dollar-curly-braces
+            new_value: $$$$${AN_ENVVAR}-suffix
+          - action: add_label
+            new_label: sextuple-dollar-no-curly-braces
+            new_value: $$$$$$AN_ENVVAR-suffix
+          - action: add_label
+            new_label: sextuple-dollar-curly-braces
+            new_value: $$$$$${AN_ENVVAR}-suffix
+          - action: add_label
+            new_label: septuple-dollar-no-curly-braces
+            new_value: $$$$$$$AN_ENVVAR-suffix
+          - action: add_label
+            new_label: septuple-dollar-curly-braces
+            new_value: $$$$$$${AN_ENVVAR}-suffix
+          - action: add_label
+            new_label: octuple-dollar-no-curly-braces
+            new_value: $$$$$$$$AN_ENVVAR-suffix
+          - action: add_label
+            new_label: octuple-dollar-curly-braces
+            new_value: $$$$$$$${AN_ENVVAR}-suffix
+          - action: add_label
+            new_label: nonuple-dollar-no-curly-braces
+            new_value: $$$$$$$$$AN_ENVVAR-suffix
+          - action: add_label
+            new_label: nonuple-dollar-curly-braces
+            new_value: $$$$$$$$${AN_ENVVAR}-suffix
+          - action: add_label
+            new_label: decuple-dollar-no-curly-braces
+            new_value: $$$$$$$$$$AN_ENVVAR-suffix
+          - action: add_label
+            new_label: decuple-dollar-curly-braces
+            new_value: $$$$$$$$$${AN_ENVVAR}-suffix
+
+exporters:
+  otlp:
+    endpoint: "${OTLP_ENDPOINT}"
+    insecure: true
+service:
+  pipelines:
+    metrics:
+      receivers:
+        - hostmetrics
+      processors:
+        - filter
+        - metricstransform
+      exporters:
+        - otlp