Merge ~sergiodj/loki-snap:add-promtail-config into loki-snap:rock

[Sergio Durigan Junior]

This MP adds a local promtail configuration file. This is useful because promtail is an important tool in the Loki workflow. I will also add this file to the ROCK image being generated from this snap.

[Athos Ribeiro (athos-ribeiro)]

LGTM, I left a comment/question inline, but I do not believe it is an issue for the snap :)

review: Approve

[Sergio Durigan Junior (sergiodj)]

Thanks for the review, Athos. I'm leaving a reply to your comment with a question; let me know what you think.

[Sergio Durigan Junior (sergiodj)]

On Wednesday, April 06 2022, Athos Ribeiro wrote:

> Diff comments:
>
>> diff --git a/etc/loki/promtail-local-config.yaml b/etc/loki/promtail-local-config.yaml
>> new file mode 100644
>> index 0000000..3b92565
>> --- /dev/null
>> +++ b/etc/loki/promtail-local-config.yaml
>> @@ -0,0 +1,18 @@
>> +server:
>> + http_listen_port: 9080
>> + grpc_listen_port: 0
>> +
>> +positions:
>> + filename: /tmp/positions.yaml
>
> +1

Thanks Athos. Pushed.

--
Sergio
GPG key ID: E92F D0B3 6B14 F1F4 D8E0 EB2F 106D A1C8 C3CB BF14

diff --git a/etc/loki/promtail-local-config.yaml b/etc/loki/promtail-local-config.yaml
new file mode 100644
index 0000000..f36356d
--- /dev/null
+++ b/etc/loki/promtail-local-config.yaml
@@ -0,0 +1,18 @@
+server:
+  http_listen_port: 9080
+  grpc_listen_port: 0
+
+positions:
+  filename: ${SNAP_COMMON}/positions.yaml
+
+clients:
+  - url: http://localhost:3100/loki/api/v1/push
+
+scrape_configs:
+- job_name: system
+  static_configs:
+  - targets:
+      - localhost
+    labels:
+      job: varlogs
+      __path__: /var/log/*log
diff --git a/snapcraft.yaml b/snapcraft.yaml
index 2d45a86..e88b11f 100644
--- a/snapcraft.yaml
+++ b/snapcraft.yaml
@@ -89,3 +89,4 @@ parts:
       - bin/config-set
       - bin/common
       - etc/loki/loki.yaml
+      - etc/loki/promtail-local-config.yaml