testcab/java-runtime-info
A docker image to visualize cpu/memory requests/limits specified on pod in kubernetes.
Image
0
502
testcab/java-runtime-info repository overview
java-runtime-info
This is a docker image intended to print out available processors and max memory of java runtime, in order to visualize cpu/memory requests/limits specified on pod in kubernetes.
Test Results
Tested with docker image openjdk:8-jre on a kubernetes cluster of 3 VMs with 16 vCPU and 32 GiB memory. Memory request and limit are not set. Test files can be found under tests directory.
| CPU Request | CPU Limit | = | Available Processors | Max Memory |
|---|---|---|---|---|
| 0 / (none) | (none) | = | 1 | 8151564288 |
| 500m | (none) | = | 1 | 8151564288 |
| 1 | (none) | = | 16 | 7495745536 |
| 1500m | (none) | = | 2 | 7495745536 |
| 2 | (none) | = | 2 | 7495745536 |
| 500m | 800m | = | 1 | 8151564288 |
| 500m | 1 | = | 1 | 8151564288 |
| 1 | 2 | = | 2 | 7495745536 |
| 1 | 3500m | = | 4 | 7495745536 |
| 1500m | 3500m | = | 4 | 7495745536 |
Conclusions:
- If CPU limit is specified, available processors are set to the ceiling of CPU limit;
- If CPU request is specified but limit unspecified, available processors are set to the ceiling of CPU request with the following exception:
- If CPU request is set to 1, available processors are set to the number of CPU cores of the underlying VM.
LICENSE
Tag summary
Content type
Image
Digest
Size
100.8 MB
Last updated
about 7 years ago
docker pull testcab/java-runtime-info