Render node graphs by node

[shtripat]

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Description

Node graphs by node

Motivation and Context

As total drives count, online vs offline are per node basis, its correct to select node for which graphs need to be rendered.

How to test this PR?

Set prometheus scrape jobs to fetch metrics from all nodes. A sample scrape job for node metrics could be as below

- job_name: minio-job-node
  bearer_token: <token>
  metrics_path: /minio/v2/metrics/node
  scheme: https
  tls_config:
    insecure_skip_verify: true
  static_configs:
  - targets: [tenant1-ss-0-0.tenant1-hl.tenant-ns.svc.cluster.local:9000,tenant1-ss-0-1.tenant1-hl.tenant-ns.svc.cluster.local:9000,tenant1-ss-0-2.tenant1-hl.tenant-ns.svc.cluster.local:9000,tenant1-ss-0-3.tenant1-hl.tenant-ns.svc.cluster.local:9000]

Load the dashboard in grafana and select server to visualize the graphs.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Optimization (provides speedup with no functional changes)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• Fixes a regression (If yes, please add commit-id or PR # here)
• Unit tests added/updated
• Internal documentation updated
• Create a documentation update request here