kube-allocated-resources
This is a simple go tool, that calculates the allocated resources from all nodes matching the label selector.
Build
Build on Linux to run on Linux:
go build -o kube-allocated-resources
Build on Mac to run on Linux:
GOOS=linux GOARCH=386 CGO_ENABLED=0 go build -o kube-allocated-resources
Usage
./kube-allocated-resources -h
Usage of ./kube-allocated-resources:
-d Return node details
-g Return totals grouped by the instance type
-l string
Selector (label query) to filter on, supports '=', '==', and '!='.(e.g. -l key1=value1,key2=value2) (default "servicecomponent=workernode")
-o string
Output format. One of: json or yaml (default "json")
Examples
Get the to allocated resources from all nodes matching the label selector
./kube-allocated-resources -l node-role.kubernetes.io/worker="",node.kubernetes.io/instance-type=m5.2xlarge -o json| jq
Output:
{
"totals": {
"node_count": 39,
"cpu_requests": 225652,
"cpu_requests_percentage": 72,
"cpu_limits": 666195,
"cpu_limits_percentage": 213,
"cpu_total": 312000,
"memory_requests": 481475656192,
"memory_requests_percentage": 37,
"memory_limits": 940615522048,
"memory_limits_percentage": 72,
"memory_total": 1291281694720,
"pods_allocated": 1692,
"pods_total": 9750,
"pods_allocated_percentage": 17
}
}
Get the to allocated resources from nodes matching the label selector detailed per node
./kube-allocated-resources -l node-role.kubernetes.io/worker="" -o json -d | jq
Output:
{
"totals": {
"node_count": 45,
"cpu_requests": 273755,
"cpu_requests_percentage": 65,
"cpu_limits": 766395,
"cpu_limits_percentage": 182,
"cpu_total": 420000,
"memory_requests": 543121211136,
"memory_requests_percentage": 30,
"memory_limits": 1090504162048,
"memory_limits_percentage": 60,
"memory_total": 1791866646528,
"pods_allocated": 1839,
"pods_total": 11250,
"pods_allocated_percentage": 16
},
"nodes": [
{
"node_name": "ip-10-30-46-119.ec2.internal",
"instance_type": "m5.2xlarge",
"cpu_requests": 5959,
"cpu_requests_percentage": 74.4875,
"cpu_limits": 10300,
"cpu_limits_percentage": 128.75,
"cpu_total": 8000,
"memory_requests": 9690939392,
"memory_requests_percentage": 29.16565788753514,
"memory_limits": 14728298496,
"memory_limits_percentage": 44.32599336597258,
"memory_total": 33227227136,
"pods_allocated": 30,
"pods_total": 250,
"pods_allocated_percentage": 12
},
...
]
}
Get the to allocated resources from nodes matching the label selector grouped by the instance type
./kube-allocated-resources -l node-role.kubernetes.io/worker="" -o json -g | jq
Output:
{
"totals": {
"node_count": 45,
"cpu_requests": 273830,
"cpu_requests_percentage": 65,
"cpu_limits": 767895,
"cpu_limits_percentage": 182,
"cpu_total": 420000,
"memory_requests": 544731823872,
"memory_requests_percentage": 30,
"memory_limits": 1092114774784,
"memory_limits_percentage": 60,
"memory_total": 1791866646528,
"pods_allocated": 1842,
"pods_total": 11250,
"pods_allocated_percentage": 16
},
"groupedby_instance_type": [
{
"node_count": 3,
"instance_type": "m5.8xlarge",
"cpu_requests": 44992,
"cpu_requests_percentage": 46,
"cpu_limits": 94200,
"cpu_limits_percentage": 98,
"cpu_total": 96000,
"memory_requests": 53357510656,
"memory_requests_percentage": 13,
"memory_limits": 146569700352,
"memory_limits_percentage": 36,
"memory_total": 400900472832,
"pods_allocated": 60,
"pods_total": 750,
"pods_allocated_percentage": 8
},
{
"node_count": 39,
"instance_type": "m5.2xlarge",
"cpu_requests": 224717,
"cpu_requests_percentage": 72,
"cpu_limits": 667695,
"cpu_limits_percentage": 214,
"cpu_total": 312000,
"memory_requests": 479615581952,
"memory_requests_percentage": 37,
"memory_limits": 939253618432,
"memory_limits_percentage": 72,
"memory_total": 1291281694720,
"pods_allocated": 1696,
"pods_total": 9750,
"pods_allocated_percentage": 17
},
{
"node_count": 3,
"instance_type": "r5.xlarge",
"cpu_requests": 4121,
"cpu_requests_percentage": 34,
"cpu_limits": 6000,
"cpu_limits_percentage": 50,
"cpu_total": 12000,
"memory_requests": 11758731264,
"memory_requests_percentage": 11,
"memory_limits": 6291456000,
"memory_limits_percentage": 6,
"memory_total": 99684478976,
"pods_allocated": 86,
"pods_total": 750,
"pods_allocated_percentage": 11
}
]
}
JQ query examples
Get tab delimited values
./kube-allocated-resources -l node-role.kubernetes.io/worker="",node.kubernetes.io/instance-type=m5.8xlarge -o json | jq -r '[
.totals.cpu_total,
.totals.cpu_requests
] | @tsv'
Output:
96000 44992
Do some math
./kube-allocated-resources -l node-role.kubernetes.io/worker="",node.kubernetes.io/instance-type=m5.8xlarge -o json -d | jq -r '. | [
reduce .nodes[].cpu_total as $num (0; .+$num),
reduce .nodes[].cpu_requests as $num (0; .+$num)
] | @tsv'
Output:
96000 44992
