add validation logs for configured Logger/Audit HTTP targets

[harshavardhana]

Description

add validation logs for configured Logger/Audit HTTP targets

Motivation and Context

extra logs in-case of misconfiguration of audit/logger targets

How to test this PR?

~ MINIO_AUDIT_WEBHOOK_ENABLE=on MINIO_AUDIT_WEBHOOK_ENDPOINT=http://localhost:9001 minio server ~/test

API: SYSTEM()
Time: 12:56:16 PDT 08/15/2020
DeploymentID: 061d9868-a5e2-497e-815b-b88f84e43e39
Error: Unable to initialize audit HTTP target: Post "http://localhost:9001": dial tcp 127.0.0.1:9001: connect: connection refused
       7: cmd/config-current.go:482:cmd.lookupConfigs()
       6: cmd/config-current.go:606:cmd.loadConfig()
       5: cmd/config.go:233:cmd.initConfig()
       4: cmd/config.go:193:cmd.(*ConfigSys).Init()
       3: cmd/server-main.go:340:cmd.initAllSubsystems()
       2: cmd/server-main.go:265:cmd.initSafeMode()
       1: cmd/server-main.go:529:cmd.serverMain()

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• 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 needed
• Unit tests needed

[poornas]

LGTM

[minio-trusted]

Mint Automation

Test	Result
mint-xl.sh	✔️
mint-large-bucket.sh	✔️
mint-fs.sh	✔️
mint-dist-xl.sh	✔️
mint-zoned.sh	✔️
mint-gateway-nas.sh	✔️
mint-gateway-s3.sh	❌ more...
mint-gateway-azure.sh	❌ more...

10274-a819c4e/mint-gateway-s3.sh.log:

Running with
SERVER_ENDPOINT:      minio-c2.minio.io:31532
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

To get logs, run 'docker cp 066a66846c50:/mint/log /tmp/mint-logs'

(1/15) Running aws-sdk-go tests ... done in 0 seconds
(2/15) Running aws-sdk-java tests ... done in 2 seconds
(3/15) Running aws-sdk-php tests ... done in 41 seconds
(4/15) Running aws-sdk-ruby tests ... done in 2 seconds
(5/15) Running awscli tests ... done in 2 minutes and 2 seconds
(6/15) Running healthcheck tests ... done in 0 seconds
(7/15) Running mc tests ... done in 46 seconds
(8/15) Running minio-dotnet tests ... done in 28 seconds
(9/15) Running minio-go tests ... FAILED in 58 seconds
{
  "args": {
    "destination": {
      "Bucket": "minio-go-test-t23a6s2t3cj6w9vj",
      "Object": "srcObject",
      "Encryption": {},
      "UserMetadata": null,
      "ReplaceMetadata": false,
      "UserTags": null,
      "ReplaceTags": false,
      "LegalHold": "",
      "Mode": "",
      "RetainUntilDate": "0001-01-01T00:00:00Z",
      "Size": 0,
      "Progress": null
    },
    "source": {
      "Bucket": "minio-go-test-t23a6s2t3cj6w9vj",
      "Object": "srcObject",
      "VersionID": "",
      "MatchETag": "",
      "NoMatchETag": "",
      "MatchModifiedSince": "0001-01-01T00:00:00Z",
      "MatchUnmodifiedSince": "0001-01-01T00:00:00Z",
      "MatchRange": false,
      "Start": 0,
      "End": 0,
      "Encryption": null
    }
  },
  "duration": 386,
  "error": "This copy request is illegal because it is trying to copy an object to itself without changing the object's metadata, storage class, website redirect location or encryption attributes.",
  "function": "CopyObject(destination, source)",
  "message": "CopyObject failed",
  "name": "minio-go: testEncryptedSSES3ToSSES3CopyObject",
  "status": "FAIL"
}
(9/15) Running minio-java tests ... done in 21 seconds
(10/15) Running minio-js tests ... done in 42 seconds
(11/15) Running minio-py tests ... done in 1 minutes and 23 seconds
(12/15) Running s3cmd tests ... done in 1 minutes and 0 seconds
(13/15) Running s3select tests ... done in 3 seconds
(14/15) Running security tests ... done in 0 seconds

Executed 14 out of 15 tests successfully.

10274-a819c4e/mint-gateway-azure.sh.log:

Running with
SERVER_ENDPOINT:      minio-dev6.minio.io:32255
ACCESS_KEY:           minioazure
SECRET_KEY:           ***REDACTED***
ENABLE_HTTPS:         0
SERVER_REGION:        us-east-1
MINT_DATA_DIR:        /mint/data
MINT_MODE:            full
ENABLE_VIRTUAL_STYLE: 0

To get logs, run 'docker cp aa76bd2ee64b:/mint/log /tmp/mint-logs'

(1/15) Running aws-sdk-go tests ... done in 7 seconds
(2/15) Running aws-sdk-java tests ... done in 1 seconds
(3/15) Running aws-sdk-php tests ... done in 4 minutes and 8 seconds
(4/15) Running aws-sdk-ruby tests ... done in 17 seconds
(5/15) Running awscli tests ... done in 2 minutes and 43 seconds
(6/15) Running healthcheck tests ... done in 1 seconds
(7/15) Running mc tests ... done in 2 minutes and 57 seconds
(8/15) Running minio-dotnet tests ... done in 1 minutes and 33 seconds
(9/15) Running minio-go tests ... FAILED in 5 minutes and 12 seconds
{
  "args": {},
  "duration": 956,
  "error": "The specified multipart upload does not exist. The upload ID may be invalid, or the upload may have been aborted or completed.",
  "function": "CopyObjectPart(destination, source)",
  "message": "CompleteMultipartUpload call failed",
  "name": "minio-go: testUnencryptedToSSES3CopyObjectPart",
  "status": "FAIL"
}
(9/15) Running minio-java tests ... done in 6 minutes and 0 seconds
(10/15) Running minio-js tests ... done in 3 minutes and 41 seconds
(11/15) Running minio-py tests ... FAILED in 2 seconds
{
  "name": "minio-py:test_negative_make_bucket_invalid_name",
  "status": "FAIL",
  "args": {
    "location": "default value ('us-east-1')",
    "bucket_name": ".minio-py-test-0842085a-df75-4bc0-828a-6d4722fd7915"
  },
  "message": "NoSuchBucket: message: The specified bucket does not exist.",
  "error": "Traceback (most recent call last):\n  File \"/mint/run/core/minio-py/tests.py\", line 147, in _call_test\n    func(log_entry, *args, **kwargs)\n  File \"/mint/run/core/minio-py/tests.py\", line 241, in test_negative_make_bucket_invalid_name\n    _call(log_entry, _CLIENT.make_bucket, bucket_name)\n  File \"/mint/run/core/minio-py/tests.py\", line 130, in _call\n    return func(*args, **kwargs)\n  File \"/usr/local/lib/python3.6/dist-packages/minio/api.py\", line 335, in make_bucket\n    raise ResponseError(response, method, bucket_name).get_exception()\nminio.error.NoSuchBucket: NoSuchBucket: message: The specified bucket does not exist.\n",
  "function": "make_bucket(bucket_name, location, object_lock)",
  "duration": 400
}
(11/15) Running s3cmd tests ... done in 1 minutes and 21 seconds
(12/15) Running s3select tests ... done in 58 seconds
(13/15) Running security tests ... done in 0 seconds

Executed 13 out of 15 tests successfully.

Deleting image on docker hub
Deleting image locally

[kannappanr]

LGTM