initial: create stack, add readme

promtail/config.yml

@@ -0,0 +1,30 @@
+---
+server:
+  http_listen_address: 0.0.0.0
+  http_listen_port: 9080
+
+positions:
+  filename: /tmp/positions.yaml
+
+clients:
+  - url: http://loki:3100/loki/api/v1/push
+
+scrape_configs:
+  - job_name: docker
+    docker_sd_configs:
+      - host: unix:///var/run/docker.sock
+        refresh_interval: 5s
+        filters:
+        - name: label
+          values: ["loki.log=true"]
+    pipeline_stages:
+      - docker: {}
+      - static_labels:
+          job: "promtail"
+    relabel_configs:
+      - source_labels: ['__meta_docker_container_name']
+        regex: '/(.*)'
+        target_label: 'container'
+      - source_labels: ['__meta_docker_container_log_stream']
+        regex: '/(.*)'
+        target_label: 'source_stream'