Devenv: Add loki self logging to Jaeger block (#23646)

devenv/README.md

@@ -39,4 +39,11 @@ Some of the blocks support dynamic change of the image version used in the Docke
 make devenv sources=postgres,openldap,grafana postgres_version=9.2 grafana_version=6.7.0-beta1
 ```
 
-Note: The grafana block is pre-configured with the dev-datasources and dashboards.
+
+### Notes per block
+
+#### Grafana
+The grafana block is pre-configured with the dev-datasources and dashboards.
+
+#### Jaeger
+Jaeger block runs both Jaeger and Loki container. Loki container sends traces to Jaeger and also logs its own logs into itself so it is possible to setup derived field for traceID from Loki to Jaeger. You need to install a docker plugin for the self logging to work, without it the container won't start. See https://github.com/grafana/loki/tree/master/cmd/docker-driver#plugin-installation for installation instructions.

devenv/datasources.yaml

@@ -246,5 +246,29 @@ datasources:
     access: proxy
     url: http://localhost:3100
     editable: false
+    jsonData:
+      derivedFields:
+        - name: "traceID"
+          matcherRegex: "trace_id=(\\w+)"
+          url: "$${__value.raw}"
+          datasourceUid: gdev-jaeger
+        - name: "traceID"
+          matcherRegex: "trace_id=(\\w+)"
+          url: "$${__value.raw}"
+          datasourceUid: gdev-zipkin
+
+  - name: gdev-jaeger
+    type: jaeger
+    uid: gdev-jaeger
+    access: proxy
+    url: http://localhost:16686
+    editable: false
+
+  - name: gdev-zipkin
+    type: zipkin
+    uid: gdev-zipkin
+    access: proxy
+    url: http://localhost:9411
+    editable: false
 
 

devenv/docker/blocks/jaeger/docker-compose.yaml

@@ -10,6 +10,11 @@
     ports:
       - "3100:3100"
     command: -config.file=/etc/loki/local-config.yaml
+    # For this to work you need to install the logging driver see https://github.com/grafana/loki/tree/master/cmd/docker-driver#plugin-installation
+    logging:
+      driver: loki
+      options:
+        loki-url: "http://localhost:3100/loki/api/v1/push"
     # Optional jaeger tracing
     environment:
       - JAEGER_AGENT_HOST=jaeger