YARN dedicated VC

[mzmssg]

Goal:
provide a feature to reserve nodes.

Solution:
leverage yarn node-label to create exclusive vc.

Items:

• Cmdline tool to add dedicated vc
• Rest-server expose accurate resource instead of percentage
• Webportal show dedicated vc
• metrics fix

Features might be impacted:

1. Available gpus
   Now, available gpus should exclude dedicated gpus. Rest-api exposes it in resourceTotal.
2. Available nodes
   Now some nodes are dedicated for a vc, should show the mapping. Rest-api expose it in nodeList.

[mzmssg]

Cmdline tools:
Add three command in node_maintain.py

python node_maintain.py dedicated-vc get -m {master ip}
python node_maintain.py dedicated-vc add -m {master ip} -v {vc name} -n {dedicated nodes}
python node_maintain.py dedicated-vc remove -m {master ip} -v {vc name}

[mzmssg]

Rest api:
Add dedicated and total resource field:

{
  //capacity percentage this virtual cluster can use of entire cluster
  "capacity":50,
  //max capacity percentage this virtual cluster can use of entire cluster
  "maxCapacity":100,
  // used capacity percentage this virtual cluster can use of entire cluster
  "usedCapacity":0,
  "numActiveJobs":0,
  "numJobs":0,
  "numPendingJobs":0,
  "resourcesUsed":{
   "memory":0,
   "vCores":0,
   "GPUs":0
  },
 "resourcesTotal":{
   "memory":0,
   "vCores":0,
   "GPUs":0
  },
  "dedicated": true/false,
  // RUNNING: vc is enabled
  // STOPPED: vc is disabled, without either new job or running job.
  // DRAINING: intermedia state from RUNNING to STOPPED, in waiting on existing job.
  "status":"RUNNING"/"STOPPED"/"DRAINING",
  "nodeList": [node1, node2]
}

[mzmssg]

Webportal:
add dedicated vc table, add total resource in existing columns, add bonus column:

[mzmssg]

Exporter & prometheus:
Exporter will consider node label when calculating available resource