allow users with admin:metrics to read app metrics

scripts/create_metrics_app.sh

@@ -0,0 +1,65 @@
+#!/bin/sh
+
+read -p "Instance URL (e.g https://example.com): " INSTANCE_URL
+
+echo "Creating oauth app..."
+
+RESP=$(curl \
+    -XPOST \
+    $INSTANCE_URL/api/v1/apps \
+    --silent \
+    --data-urlencode 'client_name=fedibash' \
+    --data-urlencode 'redirect_uris=urn:ietf:wg:oauth:2.0:oob' \
+    --data-urlencode 'scopes=admin:metrics' \
+    --header "Content-Type: application/x-www-form-urlencoded"
+)
+
+client_id=$(echo $RESP | jq -r .client_id)
+client_secret=$(echo $RESP | jq -r .client_secret)
+
+if [ -z "$client_id"]; then
+  echo "Could not create an app"
+  echo "$RESP"
+  exit 1
+fi
+
+echo "Please visit the following URL and input the code provided"
+AUTH_URL="$INSTANCE_URL/oauth/authorize?client_id=$client_id&redirect_uri=urn:ietf:wg:oauth:2.0:oob&scope=admin:metrics&response_type=code"
+if [ ! -z "$BROWSER" ]; then
+  $BROWSER $AUTH_URL
+fi;
+
+echo $AUTH_URL
+
+read -p "Code: " CODE
+
+echo "Requesting code..."
+
+RESP=$(curl \
+    -XPOST \
+    $INSTANCE_URL/oauth/token \
+    --silent \
+    --header "Content-Type: application/x-www-form-urlencoded" \
+    --data-urlencode "client_id=$client_id" \
+    --data-urlencode "client_secret=$client_secret" \
+    --data-urlencode "code=$CODE" \
+    --data-urlencode "grant_type=authorization_code" \
+    --data-urlencode 'redirect_uri=urn:ietf:wg:oauth:2.0:oob' \
+    --data-urlencode "scope=admin:metrics"
+)
+
+ACCESS_TOKEN="$(echo $RESP | jq -r .access_token)"
+
+echo "Token is $ACCESS_TOKEN"
+DOMAIN=$(echo $INSTANCE_URL | sed -e 's/^https:\/\///')
+
+echo "Use the following config in your prometheus.yml:
+- job_name: akkoma
+  scheme: https
+  authorization:
+    credentials: $ACCESS_TOKEN
+  metrics_path: /api/v1/akkoma/metrics
+  static_configs:
+  - targets:
+    - $DOMAIN
+"