feat(examples): Add standalone docker compose setup for OTEL

Signed-off-by: Joonas Bergius <joonas@cosmonic.com>

Author: joonas

examples/docker/config/grafana-datasources.yaml

@@ -0,0 +1,23 @@
+apiVersion: 1
+
+datasources:
+  - name: Loki
+    type: loki
+    access: proxy
+    orgId: 1
+    url: http://loki:3100
+    basicAuth: false
+    version: 1
+    editable: false
+  - name: Prometheus
+    type: prometheus
+    url: http://prometheus:9090
+    access: proxy
+    editable: true
+  - name: Tempo
+    type: tempo
+    access: proxy
+    url: http://tempo:7999
+    version: 1
+    editable: false
+    uid: tempo

examples/docker/config/loki.yaml

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+auth_enabled: false
+
+server:
+  http_listen_port: 3100
+
+common:
+  path_prefix: /loki
+  storage:
+    filesystem:
+      chunks_directory: /loki/chunks
+      rules_directory: /loki/rules
+  replication_factor: 1
+  ring:
+    kvstore:
+      store: inmemory
+
+schema_config:
+  configs:
+    - from: 2020-10-24
+      store: boltdb-shipper
+      object_store: filesystem
+      schema: v11
+      index:
+        prefix: index_
+        period: 24h
+
+ruler:
+  alertmanager_url: http://localhost:9093
+
+# By default, Loki will send anonymous, but uniquely-identifiable usage and configuration
+# analytics to Grafana Labs. These statistics are sent to https://stats.grafana.org/
+#
+# If you would like to enable reporting, comment out the following lines:
+analytics:
+  reporting_enabled: false

examples/docker/config/otel-collector.yaml

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+extensions:
+  health_check:
+
+receivers:
+  otlp:
+    protocols:
+      grpc:
+        endpoint: 0.0.0.0:4317
+      http:
+        endpoint: 0.0.0.0:4318
+
+processors:
+  batch:
+
+exporters:
+  debug:
+  loki:
+    endpoint: http://loki:3100/loki/api/v1/push
+    default_labels_enabled:
+      exporter: false
+      job: true
+  prometheusremotewrite:
+    endpoint: http://prometheus:9090/api/v1/write
+    tls:
+      insecure: true
+  otlphttp/tempo:
+    endpoint: http://tempo:4318
+
+service:
+  pipelines:
+    traces:
+      receivers: [otlp]
+      processors: [batch]
+      exporters: [otlphttp/tempo, debug]
+
+    metrics:
+      receivers: [otlp]
+      processors: [batch]
+      exporters: [prometheusremotewrite, debug]
+
+    logs:
+      receivers: [otlp]
+      processors: [batch]
+      exporters: [loki, debug]
+
+  extensions: [health_check]

examples/docker/config/prometheus.yaml

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+global:
+  scrape_interval: 15s
+  scrape_timeout: 10s
+  evaluation_interval: 15s
+scrape_configs:

examples/docker/config/tempo.yaml

@@ -0,0 +1,22 @@
+server:
+  http_listen_port: 7999
+
+distributor:
+  log_received_spans:
+    enabled: true
+  receivers:
+    otlp:
+      protocols:
+        http:
+          endpoint: "0.0.0.0:4318"
+
+storage:
+  trace:
+    backend: local
+    block:
+      v2_encoding: zstd
+    wal:
+      path: /tmp/tempo/wal
+      v2_encoding: none
+    local:
+      path: /tmp/tempo/blocks

examples/docker/docker-compose-otel.yml

@@ -0,0 +1,69 @@
+# This docker-compose file starts the entire wasmCloud observability ecosystem, including:
+#   grafana for dashboards
+#   otel-collector for ingesting the OTLP signals from wasmcloud host
+# . prometheus for metrics
+# . tempo for traces
+# . loki for logs
+
+version: "3"
+services:
+  grafana:
+    image: grafana/grafana:10.0.10
+    ports:
+      - 5050:3000
+    environment:
+      - GF_AUTH_ANONYMOUS_ENABLED=true
+      - GF_AUTH_ANONYMOUS_ORG_ROLE=Admin
+      - GF_AUTH_DISABLE_LOGIN_FORM=true
+    volumes:
+      - ./config/grafana-datasources.yaml:/etc/grafana/provisioning/datasources/datasources.yaml
+    depends_on:
+      - loki
+      - prometheus
+      - tempo
+
+  otelcol:
+    image: otel/opentelemetry-collector-contrib:0.93.0
+    command:
+      - '--config=/etc/otelcol/config.yaml'
+    volumes:
+      - ./config/otel-collector.yaml:/etc/otelcol/config.yaml
+    ports:
+      - 4317:4317
+      - 4318:4318
+    depends_on:
+      - loki
+      - prometheus
+      - tempo
+
+  loki:
+    image: grafana/loki:2.9.4
+    command:
+      - '-config.file=/etc/loki/config.yaml'
+    volumes:
+      - ./config/loki.yaml:/etc/loki/config.yaml
+    ports:
+      - 3100:3100
+    restart: unless-stopped
+
+  prometheus:
+    image: prom/prometheus:v2.49.1
+    command:
+      - '--config.file=/etc/prometheus/config.yaml'
+      - '--web.enable-remote-write-receiver'
+      - '--enable-feature=native-histograms'
+    volumes:
+      - ./config/prometheus.yaml:/etc/prometheus/config.yaml
+    ports:
+      - 9090:9090
+    restart: unless-stopped
+
+  tempo:
+    image: grafana/tempo:2.3.1
+    command:
+      - '-config.file=/etc/tempo/config.yaml'
+    volumes:
+      - ./config/tempo.yaml:/etc/tempo/config.yaml
+    ports:
+      - 4318 # This port is used for sending traces from otel-collector to tempo
+      - 7999:7999 # tempo