chore: tier 1 freshness: content/config/daemon/prometheus.md

Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>

content/config/daemon/prometheus.md

@@ -3,9 +3,9 @@ description: Collecting Docker metrics with Prometheus
 keywords: prometheus, metrics
 title: Collect Docker metrics with Prometheus
 aliases:
-- /engine/admin/prometheus/
-- /config/thirdparty/monitoring/
-- /config/thirdparty/prometheus/
+  - /engine/admin/prometheus/
+  - /config/thirdparty/monitoring/
+  - /config/thirdparty/prometheus/
 ---
 
 [Prometheus](https://prometheus.io/) is an open-source systems monitoring and
@@ -19,13 +19,13 @@ container, and monitor your Docker instance using Prometheus.
 > development and may change at any time.
 { .warning }
 
-Currently, you can only monitor Docker itself. You cannot currently monitor your
+Currently, you can only monitor Docker itself. You can't currently monitor your
 application using the Docker target.
 
 ## Prerequisites
 
-1.  One or more Docker engines are joined into a Docker swarm, using `docker
-    swarm init` on one manager and `docker swarm join` on other managers and
+1.  One or more Docker engines are joined into a Docker Swarm, using `docker
+swarm init` on one manager and `docker swarm join` on other managers and
     worker nodes.
 2.  You need an internet connection to pull the Prometheus image.
 
@@ -33,23 +33,22 @@ application using the Docker target.
 
 To configure the Docker daemon as a Prometheus target, you need to specify the
 `metrics-address`. The best way to do this is via the `daemon.json`, which is
-located at one of the following locations by default. If the file does not
+located at one of the following locations by default. If the file doesn't
 exist, create it.
 
 - **Linux**: `/etc/docker/daemon.json`
 - **Windows Server**: `C:\ProgramData\docker\config\daemon.json`
-- **Docker Desktop for Mac / Docker Desktop for Windows**: Click the Docker icon in the toolbar,
-  select **Settings**, then select **Docker Engine**.
+- **Docker Desktop**: Open the Docker Desktop settings and select **Docker Engine**.
 
 If the file is currently empty, paste the following:
 
 ```json
 {
-  "metrics-addr" : "127.0.0.1:9323"
+  "metrics-addr": "127.0.0.1:9323"
 }
 ```
 
-If the file is not empty, add the new key, making sure that the resulting
+If the file isn't empty, add the new key, making sure that the resulting
 file is valid JSON. Be careful that every line ends with a comma (`,`) except
 for the last line.
 
@@ -69,14 +68,14 @@ except for the addition of the Docker job definition at the bottom of the file.
 ```yml
 # my global config
 global:
-  scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
+  scrape_interval: 15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
   evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
   # scrape_timeout is set to the global default (10s).
 
   # Attach these labels to any time series or alerts when communicating with
   # external systems (federation, remote storage, Alertmanager).
   external_labels:
-      monitor: 'codelab-monitor'
+    monitor: "codelab-monitor"
 
 # Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
 rule_files:
@@ -87,20 +86,21 @@ rule_files:
 # Here it's Prometheus itself.
 scrape_configs:
   # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
-  - job_name: 'prometheus'
+  - job_name: "prometheus"
 
     # metrics_path defaults to '/metrics'
     # scheme defaults to 'http'.
 
     static_configs:
-      - targets: ['host.docker.internal:9090']
+      - targets: ["host.docker.internal:9090"]
 
-  - job_name: 'docker'
-         # metrics_path defaults to '/metrics'
-         # scheme defaults to 'http'.
+  - job_name:
+      "docker"
+      # metrics_path defaults to '/metrics'
+      # scheme defaults to 'http'.
 
     static_configs:
-      - targets: ['localhost:9323']
+      - targets: ["localhost:9323"]
 ```
 
 Next, start a single-replica Prometheus service using this configuration.
@@ -124,16 +124,16 @@ Next, start a single-replica Prometheus service using this configuration.
       prom/prometheus
   ```
 
-Verify that the Docker target is listed at http://localhost:9090/targets/.
+Verify that the Docker target is listed at `http://localhost:9090/targets/`.
 
 ![Prometheus targets page](images/prometheus-targets.png)
 
-You can't access the endpoint URLs directly if you use Docker Desktop 
+You can't access the endpoint URLs directly if you use Docker Desktop
 for Mac or Docker Desktop for Windows.
 
 ## Use Prometheus
 
-Create a graph. Click the **Graphs** link in the Prometheus UI. Choose a metric
+Create a graph. Select the **Graphs** link in the Prometheus UI. Choose a metric
 from the combo box to the right of the **Execute** button, and click
 **Execute**. The screenshot below shows the graph for
 `engine_daemon_network_actions_seconds_count`.
@@ -160,7 +160,7 @@ your graph.
 ![Prometheus engine_daemon_network_actions_seconds_count report](images/prometheus-graph_load.png)
 
 When you are ready, stop and remove the `ping_service` service, so that you
-are not flooding a host with pings for no reason.
+aren't flooding a host with pings for no reason.
 
 ```console
 $ docker service remove ping_service
@@ -169,8 +169,7 @@ $ docker service remove ping_service
 Wait a few minutes and you should see that the graph falls back to the idle
 level.
 
-
 ## Next steps
 
 - Read the [Prometheus documentation](https://prometheus.io/docs/introduction/overview/)
-- Set up some [alerts](https://prometheus.io/docs/alerting/overview/)
+- Set up some [alerts](https://prometheus.io/docs/alerting/overview/)