Updates for Minio Server and mc releases (#958)

Updates for mc and MinIO server releases
    
- Adds `client` command to mc support perf
- Adds new metrics
- Corrects typos and minor issues in metric related docs
    
Closes #955
Closes #956

source/operations/monitoring.rst

@@ -71,5 +71,4 @@ See :ref:`minio-healthcheck-api` for more information.
    /operations/monitoring/metrics-and-alerts
    /operations/monitoring/minio-logging
    /operations/monitoring/healthcheck-probe
-   /operations/monitoring/grafana
+   /operations/monitoring/grafana
-   

source/operations/monitoring/collect-minio-metrics-using-prometheus.rst

@@ -55,7 +55,7 @@ Use the :mc-cmd:`mc admin prometheus generate` command to generate the scrape co
 
    .. tab-item:: Nodes
 
-      The following command scrapes metrics for a nodes on the MinIO Server.
+      The following command scrapes metrics for a node on the MinIO Server.
 
       .. code-block:: shell
          :class: copyable

source/operations/monitoring/grafana.rst

@@ -32,6 +32,10 @@ To track changes to the Grafana dashboard, introspect the JSON files for the `se
 
 .. _minio-server-grafana-metrics:
 
+To track changes to the Grafana dashboard, introspect the JSON files for the `server <https://github.com/minio/minio/blob/master/docs/metrics/prometheus/grafana/minio-dashboard.json>`__ or `bucket <https://github.com/minio/minio/blob/master/docs/metrics/prometheus/grafana/minio-bucket.json>`__ dashboards in the MinIO Server GitHub repository.
+
+.. _minio-server-grafana-metrics:
+
 MinIO Server Metrics Dashboard
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 

source/operations/monitoring/metrics-and-alerts.rst

@@ -10,7 +10,7 @@ Metrics and Alerts
 
 .. contents:: Table of Contents
    :local:
-   :depth: 2
+   :depth: 3
 
 MinIO publishes cluster and node metrics using the :prometheus-docs:`Prometheus Data Model <data_model/>`.
 You can use any scraping tool to pull metrics data from MinIO for further analysis and alerting.
@@ -159,14 +159,14 @@ Cluster Usage Metrics
 Drive Metrics
 +++++++++++++
 
-``minio_cluster_disk_offline_total``
+``minio_cluster_drive_offline_total``
-  Total drives offline.
+  Total drives offline in this cluster.
 
-``minio_cluster_disk_online_total``
+``minio_cluster_drive_online_total``
-  Total drives online.
+  Total drives online in this cluster.
 
-``minio_cluster_disk_total``
+``minio_cluster_drive_total``
-  Total drives.
+  Total drives in this cluster.
 
 ILM Metrics
 +++++++++++
@@ -352,29 +352,35 @@ These metrics can be obtained from any MinIO server once per collection.
 Drive Metrics
 +++++++++++++
 
-``minio_node_disk_free_bytes``
+``minio_node_drive_free_bytes``
-  Total storage available on a drive.
+  Total storage available on a drive in this node.
 
-``minio_node_disk_free_inodes``
+``minio_node_drive_free_inodes``
-  Total free inodes.
+  Total free inodes in this node.
 
-``minio_node_disk_latency_us``
+``minio_node_drive_latency_us``
   Average last minute latency in µs for drive API storage operations.
 
-``minio_node_disk_offline_total``
+``minio_node_drive_offline_total``
-  Total drives offline.
+  Total drives offline in this node.
 
-``minio_node_disk_online_total``
+``minio_node_drive_online_total``
-  Total drives online.
+  Total drives online in this node.
 
-``minio_node_disk_total``
+``minio_node_drive_total``
-  Total drives.
+  Total drives in this node.
 
-``minio_node_disk_total_bytes``
+``minio_node_drive_total_bytes``
-  Total storage on a drive.
+  Total storage on a drive in this node.
 
-``minio_node_disk_used_bytes``
+``minio_node_drive_used_bytes``
-  Total storage used on a drive.
+  Total storage used on a drive in this node.
+
+``minio_node_drive_errors_timeout``
+  Total number of timeout errors since server start in this node.
+
+``minio_node_drive_errors_availability``
+  Total number of I/O errors, permission denied, and timeouts since server start in this node.
 
 File Metrics
 ++++++++++++

source/reference/minio-mc/mc-support-perf.rst

@@ -40,6 +40,10 @@ For more complete performance testing, consider using a combination of load-test
 
    Measure the network throughput of all nodes.
 
+#. :mc-cmd:`~mc support perf client`
+
+   Measure the network throughput to a client.
+
 .. include:: /includes/common-mc-support.rst
    :start-after: start-minio-only
    :end-before: end-minio-only
@@ -148,6 +152,19 @@ Syntax
                       [--airgap]          \
                       ALIAS
 
+.. mc-cmd:: client
+   :fullpath:
+
+   Measure the network throughput from the local device running the MinIO Client to the server.
+
+   .. code-block:: shell
+
+      mc [GLOBAL FLAGS] support perf client  \
+                      --duration             \
+                      [--verbose, -v]        \
+                      [--airgap]             \
+                      ALIAS
+
 Parameters
 ~~~~~~~~~~
 
@@ -220,9 +237,17 @@ Parameters
 .. mc-cmd:: ALIAS
    :required:
 
-   Applies to the :mc-cmd:`~mc support perf drive`, :mc-cmd:`~mc support perf object`, and :mc-cmd:`~mc support perf net` commands.
+   Applies to the :mc-cmd:`~mc support perf drive`, :mc-cmd:`~mc support perf object`, :mc-cmd:`~mc support perf net`, and :mc-cmd:`~mc support perf client` commands.
 
    The :ref:`alias <alias>` of the MinIO deployment.
+
+.. mc-cmd:: --duration
+   :required:
+
+   Applies to the :mc-cmd:`~mc support perf client` command.
+
+   Length of time in seconds to perform the test.
+   Time cannot be `0` or negative.
        
 
 Global Flags