From 6f64dd533f40dd38778cab8413231bb1070c6927 Mon Sep 17 00:00:00 2001
From: Sven Grossmann <sven.grossmann@grafana.com>
Date: Wed, 14 Dec 2022 15:02:12 +0100
Subject: [PATCH] Devenv: Add back `loki-promtail` (#60282)

* add back loki-promtail

* update README

* add MacOS note
---
 devenv/docker/blocks/loki-promtail/README.md  | 10 ++++++++
 .../blocks/loki-promtail/docker-compose.yaml  | 12 +++++++++
 .../blocks/loki-promtail/promtail-config.yaml | 25 +++++++++++++++++++
 3 files changed, 47 insertions(+)
 create mode 100644 devenv/docker/blocks/loki-promtail/README.md
 create mode 100644 devenv/docker/blocks/loki-promtail/docker-compose.yaml
 create mode 100644 devenv/docker/blocks/loki-promtail/promtail-config.yaml

diff --git a/devenv/docker/blocks/loki-promtail/README.md b/devenv/docker/blocks/loki-promtail/README.md
new file mode 100644
index 00000000000..ef92ddbd193
--- /dev/null
+++ b/devenv/docker/blocks/loki-promtail/README.md
@@ -0,0 +1,10 @@
+NB: This will not work properly on MacOS. The loglines of grafana.log are ingested at the start of this devenv and you won't get any more logs are the Docker service is started.
+
+By default this block is setup to scrape logs from Grafana. If you need to log some service from the docker-compse you can add:
+```
+    # 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://loki:3100/loki/api/v1/push"
+```
\ No newline at end of file
diff --git a/devenv/docker/blocks/loki-promtail/docker-compose.yaml b/devenv/docker/blocks/loki-promtail/docker-compose.yaml
new file mode 100644
index 00000000000..345594cb4ea
--- /dev/null
+++ b/devenv/docker/blocks/loki-promtail/docker-compose.yaml
@@ -0,0 +1,12 @@
+  loki:
+    image: grafana/loki:latest
+    ports:
+      - "3100:3100"
+    command: -config.file=/etc/loki/local-config.yaml
+  promtail:
+    image: grafana/promtail:latest
+    volumes:
+      - ./docker/blocks/loki-promtail/promtail-config.yaml:/etc/promtail/docker-config.yaml
+      - ../data/log:/var/log/grafana
+    command:
+      -config.file=/etc/promtail/docker-config.yaml
\ No newline at end of file
diff --git a/devenv/docker/blocks/loki-promtail/promtail-config.yaml b/devenv/docker/blocks/loki-promtail/promtail-config.yaml
new file mode 100644
index 00000000000..695fb67275e
--- /dev/null
+++ b/devenv/docker/blocks/loki-promtail/promtail-config.yaml
@@ -0,0 +1,25 @@
+server:
+  http_listen_port: 9080
+  grpc_listen_port: 0
+
+positions:
+  filename: /tmp/positions.yaml
+
+client:
+  url: http://loki:3100/api/prom/push
+
+scrape_configs:
+- job_name: system
+  static_configs:
+  - targets:
+      - localhost
+    labels:
+      job: varlogs
+      __path__: /var/log/*log
+- job_name: grafana
+  static_configs:
+  - targets:
+      - localhost
+    labels:
+      job: grafana
+      __path__: /var/log/grafana/*log
\ No newline at end of file