Optionally run a command when completing jobs

[andrewhibbert]

Description

This allows users to run a command before the jobs (e.g. make bucket job) are completed.

Motivation and Context

In our case we are using istio, a sidecar container is injected and we cannot contact minio without this. The problem is it does not terminate once the main container is completed. This change will allow us to add a curl command to stop the istio container, when the main command is finished so kubernetes can complete the job.

How to test this PR?

Add in a command to exitCommand, view logs and ensure you can see it has run.

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)
• Documentation updated
• Unit tests added/updated

[minio-trusted]

Mint Automation

Test	Result
mint-large-bucket.sh	✔️
mint-fs.sh	✔️
mint-gateway-s3.sh	✔️
mint-erasure.sh	✔️
mint-compress-encrypt-dist-erasure.sh	✔️
mint-pools.sh	✔️
mint-dist-erasure.sh	❌ more...

15017-028c3d2/mint-dist-erasure.sh.log:

Running with
SERVER_ENDPOINT:      minio-k8s7:32433
ACCESS_KEY:           minio
SECRET_KEY:           ***REDACTED***
ENABLE_HTTPS:         0
SERVER_REGION:        us-east-1
MINT_DATA_DIR:        /mint/data
MINT_MODE:            full
ENABLE_VIRTUAL_STYLE: 0
RUN_ON_FAIL:          0

To get logs, run 'docker cp :/mint/log /tmp/mint-logs'

(1/14) Running awscli tests ... done in 55 seconds
(2/14) Running aws-sdk-go tests ... done in 1 seconds
(3/14) Running aws-sdk-java tests ... done in 1 seconds
(4/14) Running aws-sdk-php tests ... done in 44 seconds
(5/14) Running aws-sdk-ruby tests ... done in 7 seconds
(6/14) Running healthcheck tests ... done in 0 seconds
(7/14) Running mc tests ... FAILED in 55 seconds
{
  "name": "mc",
  "duration": "40130",
  "function": "test_presigned_get_object",
  "status": "FAIL",
  "error": "/mint/run/core/mc/mc --config-dir /tmp/.mc-1234 --quiet --no-color cp /mint/data/datafile-1-MB myminio/mc-test-bucket-29804/mc-test-object-21740  >>> \n`/mint/data/datafile-1-MB` -> `myminio/mc-test-bucket-29804/mc-test-object-21740`\nmc: <ERROR> Failed to copy `/mint/data/datafile-1-MB`. Get \"http://minio-k8s7:32433/mc-test-bucket-29804/?location=\": dial tcp 15.15.15.7:32433: i/o timeout\nTotal: 0 B, Transferred: 0 B, Speed: 0 B/s"
}
(7/14) Running minio-go tests ... done in 1 minutes and 47 seconds
(8/14) Running minio-java tests ... done in 31 seconds
(9/14) Running minio-js tests ... done in 1 minutes and 5 seconds
(10/14) Running minio-py tests ... done in 1 minutes and 22 seconds
(11/14) Running s3cmd tests ... done in 27 seconds
(12/14) Running s3select tests ... done in 4 seconds
(13/14) Running versioning tests ... done in 3 minutes and 4 seconds

Executed 13 out of 14 tests successfully.

Deleting image on docker hub
Deleting image locally