docker: use profiles to optionally enable Prometheus, Loki and Grafana

This is used for demo, it makes sense to also do that for the other
components. This helps test one of the component temporarily, for
example during the e2e tests.

.env

@@ -11,15 +11,23 @@ COMPOSE_FILE=${COMPOSE_FILE}:docker/docker-compose-ipinfo.yml
 # And you need to update the paths in config/akvorado.yaml.
 
 ## Prometheus (metrics)
-# COMPOSE_FILE=${COMPOSE_FILE}:docker/docker-compose-prometheus.yml
+# To enable Prometheus, uncomment the next line.
+# COMPOSE_PROFILES=${COMPOSE_PROFILES+${COMPOSE_PROFILES-},}prometheus
+COMPOSE_FILE=${COMPOSE_FILE}:docker/docker-compose-prometheus.yml
 
 ## Loki (logs)
-# COMPOSE_FILE=${COMPOSE_FILE}:docker/docker-compose-loki.yml
+# To enable Loki, uncomment the next line.
+# COMPOSE_PROFILES=${COMPOSE_PROFILES+${COMPOSE_PROFILES-},}loki
+COMPOSE_FILE=${COMPOSE_FILE}:docker/docker-compose-loki.yml
 
 ## Grafana (visualization)
-# COMPOSE_FILE=${COMPOSE_FILE}:docker/docker-compose-grafana.yml
+# To enable Grafana, uncomment the next line.
+# COMPOSE_PROFILES=${COMPOSE_PROFILES+${COMPOSE_PROFILES-},}grafana
+COMPOSE_FILE=${COMPOSE_FILE}:docker/docker-compose-grafana.yml
 
 ## Demo
+# To enable the demo exporters, uncomment the next line.
+# COMPOSE_PROFILES=${COMPOSE_PROFILES+${COMPOSE_PROFILES-},}demo
 COMPOSE_FILE=${COMPOSE_FILE}:docker/docker-compose-demo.yml
 
 ## For testing only: use a ClickHouse cluster

console/data/docs/01-install.md

@@ -104,5 +104,7 @@ When using `docker compose`, use the following commands to get an updated
 # docker compose up -d
 ```
 
-The `docker-compose-upgrade.tar.gz` tarball contains `.env.dist` instead of `.env`.
-You may want to check for differences with your setup. Usually, there are no differences.
+The `docker-compose-upgrade.tar.gz` tarball contains `.env.dist` instead of
+`.env`, and `docker/docker-compose-local.yml.dist` instead of
+`docker/docker-compose-local.yml.dist`. You may want to check for differences
+with your setup.

console/data/docs/04-operations.md

@@ -928,12 +928,19 @@ Then, you can restart the **outlet** service.
 The default Docker Compose setup is meant to help you get started quickly. However,
 you can also use it for a production setup.
 
-The `.env` file selects the Docker Compose files that are assembled for a
-complete setup. Look at the comments for guidance. You should avoid modifying
-any existing files, except for `docker/docker-compose-local.yml`, which should
-contain your local setup.
+You are allowed to modify `.env` and `docker/docker-compose-local.yml`, as well
+as anything in `config/`. Everything else will be erased during upgrades.
 
-This file can override parts of the configuration. The [merge
+The `.env` file tailors the complete Docker Compose setup. Some parts are
+enabled using [Docker Compose
+profiles](https://docs.docker.com/compose/how-tos/profiles/). You can
+temporarily enable them with `--profile` flag to `docker compose`. In this case,
+any profile set with `COMPOSE_PROFILES` are overridden. Some other parts require
+you to uncomment additional Docker Compose configuration files directly in
+`.env`.
+
+This `docker/docker-compose-local.yml` file can override parts of the
+configuration. The [merge
 rules](https://docs.docker.com/reference/compose-file/merge/) are a bit complex.
 The general rule is that scalars are replaced, while lists and mappings are
 merged. However, there are exceptions.

console/data/docs/99-changelog.md

@@ -12,6 +12,8 @@ identified with a specific icon:
 
 ## Unreleased
 
+- 💥 *docker*: use profiles to optionally enable Prometheus, Loki, and Grafana
+  (if you were already using them, you also need to enable the profile)
 - 🩹 *console*: display missing images in documentation
 - 🩹 *console*: ensure main table is used when required even when there is no data
 - 🩹 *docker*: fix broken `/metrics` endpoint for inlet

docker/docker-compose-demo.yml

@@ -4,8 +4,7 @@ services:
     extends:
       file: versions.yml
       service: akvorado
-    profiles:
-      - demo
+    profiles: [ demo ]
     restart: unless-stopped
     command: demo-exporter http://akvorado-orchestrator:8080#0
     depends_on:

docker/docker-compose-dev.yml

@@ -189,7 +189,7 @@ services:
       file: versions.yml
       service: vector
     restart: "no"
-    profiles: [manual]
+    profiles: [ manual ]
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock:ro
       - ./vector.yaml:/etc/vector/vector.yaml:ro

docker/docker-compose-grafana.yml

@@ -6,6 +6,7 @@ services:
     extends:
       file: versions.yml
       service: grafana
+    profiles: [ grafana ]
     environment:
       GF_SERVER_ROOT_URL: /grafana
       GF_SERVER_SERVE_FROM_SUB_PATH: "true"

docker/docker-compose-loki.yml

@@ -7,6 +7,7 @@ services:
     extends:
       file: versions.yml
       service: loki
+    profiles: [ loki ]
     restart: unless-stopped
     volumes:
       - akvorado-loki:/loki
@@ -23,6 +24,7 @@ services:
     extends:
       file: versions.yml
       service: vector
+    profiles: [ loki ]
     restart: unless-stopped
     user: root                  # for access to /var/run/docker.sock
     volumes:

docker/docker-compose-prometheus.yml

@@ -8,6 +8,7 @@ services:
     extends:
       file: versions.yml
       service: prometheus
+    profiles: [ prometheus ]
     restart: unless-stopped
     volumes:
       - akvorado-prometheus:/prometheus
@@ -38,6 +39,7 @@ services:
     extends:
       file: versions.yml
       service: alloy
+    profiles: [ prometheus ]
     restart: unless-stopped
     user: root                  # for access to /var/run/docker.sock
     volumes:
@@ -69,6 +71,7 @@ services:
     extends:
       file: versions.yml
       service: node-exporter
+    profiles: [ prometheus ]
     restart: unless-stopped
     volumes:
       - /:/host:ro,rslave
@@ -86,6 +89,7 @@ services:
     extends:
       file: versions.yml
       service: cadvisor
+    profiles: [ prometheus ]
     restart: unless-stopped
     privileged: true
     volumes: