feat: add percona mongodb-exporter + smartctl-exporter sidecars

Add two more metrics sidecars to the provider stack and wire them into
vector's remote-write pipeline:

- mongodb-exporter (percona/mongodb_exporter): richer mongo metrics
  (replication, per-collection/index stats, query exec, connection pool)
  on :9216, beyond the basic server status from vector's built-in
  mongodb_metrics source. URI passed via env, not --mongodb.uri, to keep
  the password out of the container's process args.
- smartctl-exporter: disk SMART health (reallocated sectors, temperature,
  wear, predicted failure) on :9633, not captured by host_metrics/cadvisor.

vector.toml gains prometheus_scrape sources for both and includes them in
both OpenObserve remote-write sinks.

Also address review feedback: switch redis-exporter depends_on to the
list form (no conditional depends_on elsewhere in the repo's compose).

Author: goastler

docker/docker-compose.provider.yml

@@ -187,8 +187,7 @@ services:
     env_file:
       - ../.env.1.${NODE_ENV}
     depends_on:
-      redis-stack:
-        condition: service_started
+      - redis-stack
     restart: unless-stopped # unless the container has been stopped, it will be restarted, even on reboot
     expose:
       - "9121"
@@ -240,6 +239,71 @@ services:
       options:
         max-size: '100m'
         max-file: '1'
+  mongodb-exporter:
+    # Percona MongoDB exporter: richer mongo metrics (replication, per-collection
+    # & index stats, query exec stats, connection pool) in Prometheus format on
+    # :9216, scraped by vector (sources.mongodb_exporter_metrics ->
+    # http://mongodb-exporter:9216/metrics). Complements vector's built-in
+    # mongodb_metrics source, which only exposes basic server status.
+    container_name: mongodb-exporter
+    profiles:
+      - production
+      - staging
+    image: percona/mongodb_exporter:${MONGODB_EXPORTER_IMAGE:-0.43.1}
+    labels:
+      - "vector.docker=true" # log docker events
+    # MONGODB_URI is resolved by compose interpolation from the deploy-exported
+    # provider env (same MONGO_INITDB_ROOT_* values the database/vector services
+    # use). Passed via env rather than --mongodb.uri so the password isn't
+    # visible in the container's process args. --collect-all enables all
+    # collectors; --compatible-mode keeps metric names stable for dashboards.
+    environment:
+      - MONGODB_URI=mongodb://${MONGO_INITDB_ROOT_USERNAME:-root}:${MONGO_INITDB_ROOT_PASSWORD:-root}@database:27017
+    command:
+      - '--collect-all'
+      - '--compatible-mode'
+    env_file:
+      - ../.env.1.${NODE_ENV}
+    depends_on:
+      - database
+    restart: unless-stopped # unless the container has been stopped, it will be restarted, even on reboot
+    expose:
+      - "9216"
+    networks:
+      internal:
+        ipv4_address: 172.18.0.13
+        ipv6_address: fd00:aaaa::d
+    logging:
+      driver: 'json-file'
+      options:
+        max-size: '100m'
+        max-file: '1'
+  smartctl-exporter:
+    # Disk SMART health metrics (reallocated sectors, temperature, wear,
+    # predicted failure) in Prometheus format on :9633, scraped by vector
+    # (sources.smartctl_metrics -> http://smartctl-exporter:9633/metrics).
+    # Needs privileged + host /dev access to issue SMART commands to the disks.
+    container_name: smartctl-exporter
+    profiles:
+      - production
+      - staging
+    image: prometheuscommunity/smartctl-exporter:${SMARTCTL_EXPORTER_IMAGE:-v0.13.0}
+    labels:
+      - "vector.docker=true" # log docker events
+    privileged: true
+    user: root
+    restart: unless-stopped # unless the container has been stopped, it will be restarted, even on reboot
+    expose:
+      - "9633"
+    networks:
+      internal:
+        ipv4_address: 172.18.0.14
+        ipv6_address: fd00:aaaa::e
+    logging:
+      driver: 'json-file'
+      options:
+        max-size: '100m'
+        max-file: '1'
   vector:
     container_name: vector
     profiles:

docker/images/vector/src/vector.toml

@@ -809,6 +809,46 @@ source = '''
 .tags.env=get_env_var!("NODE_ENV")
 '''
 
+# =============================================================================
+# MONGODB EXPORTER METRICS (Percona)
+# =============================================================================
+# Source: Richer MongoDB metrics from the percona/mongodb_exporter sidecar.
+# Adds replication, per-collection/index stats, query exec stats and connection
+# pool detail that the built-in mongodb_metrics source above does not expose.
+[sources.mongodb_exporter_metrics]
+type = "prometheus_scrape"
+endpoints = [ "http://mongodb-exporter:9216/metrics" ]
+scrape_interval_secs = 30
+
+# Transform: Add host and environment tags to MongoDB exporter metrics
+[transforms.mongodb_exporter_metrics_format]
+type = "remap"
+inputs = ["mongodb_exporter_metrics"]
+source = '''
+.tags.host=get_env_var!("OO_HOST")
+.tags.env=get_env_var!("NODE_ENV")
+'''
+
+# =============================================================================
+# SMARTCTL DISK HEALTH METRICS
+# =============================================================================
+# Source: Disk SMART health metrics from the smartctl-exporter sidecar.
+# Reallocated sectors, temperature, wear levelling and predicted failure for the
+# host's physical disks — not captured by host_metrics or cadvisor.
+[sources.smartctl_metrics]
+type = "prometheus_scrape"
+endpoints = [ "http://smartctl-exporter:9633/metrics" ]
+scrape_interval_secs = 30
+
+# Transform: Add host and environment tags to smartctl metrics
+[transforms.smartctl_metrics_format]
+type = "remap"
+inputs = ["smartctl_metrics"]
+source = '''
+.tags.host=get_env_var!("OO_HOST")
+.tags.env=get_env_var!("NODE_ENV")
+'''
+
 # =============================================================================
 # METRICS SINKS
 # =============================================================================
@@ -817,7 +857,7 @@ source = '''
 # Uses Prometheus Remote Write protocol for efficient metric transmission
 [sinks.oo_metrics]
 type = "prometheus_remote_write"
-inputs = ["host_metrics_format", "vector_metrics_format", "cadvisor_metrics_format", "mongodb_metrics_format", "redis_metrics_format", "caddy_metrics_format"]
+inputs = ["host_metrics_format", "vector_metrics_format", "cadvisor_metrics_format", "mongodb_metrics_format", "mongodb_exporter_metrics_format", "smartctl_metrics_format", "redis_metrics_format", "caddy_metrics_format"]
 endpoint = "https://oo.prosopo.io/api/dev_organization_29569_u24VnjrjN7XrP35/prometheus/api/v1/write"
 
 [sinks.oo_metrics.auth]
@@ -844,7 +884,7 @@ when_full = "drop_newest"
 # Backup destination for metrics redundancy and disaster recovery
 [sinks.oo2_metrics]
 type = "prometheus_remote_write"
-inputs = ["host_metrics_format", "vector_metrics_format", "cadvisor_metrics_format", "mongodb_metrics_format", "redis_metrics_format", "caddy_metrics_format"]
+inputs = ["host_metrics_format", "vector_metrics_format", "cadvisor_metrics_format", "mongodb_metrics_format", "mongodb_exporter_metrics_format", "smartctl_metrics_format", "redis_metrics_format", "caddy_metrics_format"]
 endpoint = "https://oo2.prosopo.io/api/default/prometheus/api/v1/write"
 
 [sinks.oo2_metrics.auth]