mc support diag

The mc support diag command generates a health report for a MinIO AIStor deployment.

The command generates and uploads the health report to SUBNET for analysis.

Automated with Call Home

The report is automatically generated and uploaded every 24 hours with Call Home, which can be disabled or enabled at any time.

The resulting health report is intended for use by MinIO Engineering through SUBNET and may contain internal or private data points. Exercise caution before sending a health report to a third party or posting the health report in a public forum.

MinIO recommends that you run the health diagnostics when first provisioning the cluster and again at any failure scenario.

Use the mc support diag command to trigger the diagnostic test. For clusters registered with SUBNET, the command uploads the results as part of SUBNET Health reports.

For airgapped or firewalled environments, or other environments that prevent direct network access from the deployment, you can save the report locally with the --airgap flag. After saving, you can then upload the results of the test to SUBNET manually.

The report includes information such as:

System settings, services, and configurations that might impact performance
TLS certificate status, validity, expiration, and algorithm type information
CPU core count and information
Drive count, status, size, and available space
Information about data-containing partitions
Cluster size server count
File system type
Memory size and type
OS symmetry and Linux kernel version
Internode latency
Tiering configurations
NTP synchronization
Available resources
Replication configuration
AIStor Server version

The resulting report is stored locally as a markdown-formatted file named diag-report-*.md, where * is a string that identifies the particular report.

Syntax

Generate health data for a MinIO AIStor at alias myaistor and upload to SUBNET.

mc support diag myaistor

The command has the following syntax:

mc [GLOBALFLAGS] support diag                        \
                         ALIAS                       \
                         [--airgap]                  \
                         [--anonymize string]        \
                         [--check=<value>]           \
                         [--custom-header, -H value] \
                         [--dtrace]                  \
                         [--input, -i =<value>]      \
                         [--limit-download value]    \
                         [--limit-upload value]

Parameters

ALIAS

Required

The alias of the MinIO AIStor deployment.

--airgap

Optional

Use in environments without network access to SUBNET (for example, airgapped, firewalled, or similar configuration). Generates the diagnostic report and saves it to the location where you ran the command.

You must manually upload the report to SUBNET.

For instructions, see the manual upload example.

If the deployment is airgapped, but the local device where you are using the AIStor Client has network access, you do not need to use the --airgap flag.

--anonymize

Valid values are strict or standard. If not specified, log uploads use the standard mode that does not anonymize host names.

To anonymize all data, including host names, pass this parameter with the strict mode.

mc support diag myaistor --anonymize strict

--check

Specify one or more diagnostic checks to run as a comma-separated list. For example:

mc support diag myaistor --check=sys.drive,sys.mem

The client stores the report locally and does not upload the report to SUBNET.

The following table lists valid values.

Check	Name	Description
`minio.buckets.max`	Buckets Maximum	Recommended maximum number of buckets
`minio.cluster.min`	Cluster Size Minimum	Recommended minimum cluster size
`minio.license.expiry`	License	License is valid
`minio.net.latency`	Internode Network Latency	Internode Latency below 25ms
`minio.net.tls.algo`	TLS Certs Algo	TLS certificates use an optimal algorithm
`minio.net.tls.status`	TLS Status	TLS is enabled
`minio.net.tls.valid`	TLS Certs Validity	TLS certificates are valid
`minio.process.args`	CLI Args	MinIO AIStor CLI arguments are identical across the cluster
`minio.process.rlimit`	Process Resource Limit	MinIO AIStor has sufficiently large resource Limit
`minio.process.user`	Process User	MinIO AIStor running as non-root process
`minio.version.consistency`	MinIO AIStor Consistency	MinIO AIStor version is identical across the cluster
`sys.cpu.consistency`	CPU Consistency	CPU make, model and count are identical across the cluster
`sys.cpu.cores.min`	CPU Cores	Recommended minimum number of CPU cores
`sys.cpu.extensions`	CPU Vector Extensions	Performance features available on all CPUs
`sys.cpu.governor`	CPU Governor	CPU governor set to performance
`sys.drive.consistency`	Drive Consistency	Drives are identical across the cluster
`sys.drive.status`	Drive Status	Drives are online
`sys.drive.usage`	Drive Usage	Drive usage below 75%
`sys.fs.consistency`	File System Consistency	File system is identical on all Drives
`sys.fs.inodes.free`	Inodes Free	Sufficient free inodes
`sys.fs.inodes.usage`	Inodes Usage	Inodes usage in sync with drive usage
`sys.fs.supported`	File System Supported	Recommended file system
`sys.fs.xfs.errors`	XFS Errors	No continuous retries on XFS errors
`sys.mem.consistency`	Memory Consistency	Memory is identical across the Cluster
`sys.mem.iommu`	IOMMU Configuration	Input-Output Memory Management Unit configured correctly
`sys.mem.swap`	Swap Memory	Swap memory is not used
`sys.mem.thp`	Transparent Huge Pages Configuration	Transparent Huge Pages configured correctly
`sys.net.eth.buffer`	Ethernet Ring Buffer	Ethernet RX/TX ring buffer is optimal
`sys.os.config`	OS Services	No known performance-impacting OS services or configs
`sys.os.consistency`	OS Consistency	Operating systems are identical across the cluster
`sys.os.kernel.min`	Kernel Version	Recommended minimum kernel version
`sys.os.kernel.unstable`	Kernel Unstable	No unstable Kernel versions found
`sys.os.ntp`	NTP	System clocks are synchronized

--custom-header

Alias -H

Add an additional custom HTTP header to the request in key:value format.

--dtrace

Add an OpenTelemetry trace to the header.

Alternatively, set the MC_DTRACE environment variable.

--input

Alias -i

Run diagnostics on the specified file. The file must be of the format *.json.gz.

For example:

mc support diag myaistor --input=myobjstore-health.json.gz

The report does not automatically upload to SUBNET.

--limit-download

Optional

Limit client-side download rates to no more than a specified rate in KiB/s, MiB/s, or GiB/s. This affects only the download to the local device running the AIStor Client. Valid units include:

B for bytes
K for kilobytes
M for megabytes
G for gigabytes
T for terabytes
Ki for kibibytes
Mi for mibibytes
Gi for gibibytes
Ti for tebibytes

For example, to limit download rates to no more than 1 GiB/s, use the following:

--limit-download 1G

If not specified, MinIO AIStor uses an unlimited download rate.

--limit-upload

Optional

Limit client-side upload rates to no more than the specified rate in KiB/s, MiB/s, or GiB/s. This affects only the upload from the local device running the AIStor Client. Valid units include:

B for bytes
K for kilobytes
M for megabytes
G for gigabytes
T for terabytes
Ki for kibibytes
Mi for mibibytes
Gi for gibibytes
Ti for tebibytes

For example, to limit upload rates to no more than 1 GiB/s, use the following:

--limit-upload 1G

If not specified, MinIO AIStor uses an unlimited upload rate.

Global flags

This command supports any of the global flags.

Examples

Generate health data for an object store to upload manually

Generate a diagnostic report for a MinIO AIStor at alias myaistor and save it for manual upload to SUBNET:

mc support diag myaistor --airgap

Run the command to generate and save the .gzip file of the health diagnostics
Login to SUBNET and select the Deployments section
Select the deployment for the report
Select Upload
Drag and drop the file or browse to the .gzip file location to upload it

Upload data to SUBNET with strict anonymization

Generate health data for a MinIO AIStor at alias myaistor and anonymize all sensitive data, including host names.

mc support diag myaistor --anonymize strict

Generate health data for drives and memory

Perform a diagnostic check on drives and memory for a MinIO AIStor at alias myaistor.

mc support diag myaistor --check=sys.drive,sys.mem

This command generates a report that includes all data types that begin with sys.drive.* and sys.mem.*.

Check the CPU governance and file system support

Perform a diagnostic check on the CPU governance performance and whether the file system is supported only for an object store at alias myaistor.

mc support diag myaistor --check=sys.cpu.governor,sys.fs.supported

Perform a diagnostic check on a file

Perform all available checks on the file at myaistor-health.json.gz. The file should be in the current local working directory.

mc support diag myaistor --input=myaistor-health.json.gz

Behavior

Sample output

● CPU Info ... ✔
● Disk Info ... ✔
● Net Info ... ✔
● Os Info ... ✔
● Mem Info ... ✔
● Process Info ... ✔
● Server Config ... ✔
● System Errors ... ✔
● System Services ... ✔
● System Config ... ✔
● Admin Info ... ✔
*********************************************************************************
                                WARNING!!
     ** THIS FILE MAY CONTAIN SENSITIVE INFORMATION ABOUT YOUR ENVIRONMENT **
     ** PLEASE INSPECT CONTENTS BEFORE SHARING IT ON ANY PUBLIC FORUM **
*********************************************************************************
mc: MinIO AIStor diagnostics report saved to myaistor-health_20231111053323.json.gz

The gzipped output contains the requested health information.

mc support diag

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