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Add note on HOST_PROC environment variable #50217

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Add note on HOST_PROC environment variable #50217

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Add note on `HOST_PROC` environment variable
strideynet Dec 13, 2024
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Clarify procfs
strideynet Dec 16, 2024
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16 changes: 15 additions & 1 deletion docs/pages/enroll-resources/workload-identity/workload-attestation.mdx
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Expand Up @@ -37,11 +37,25 @@ available to be used when configuring rules for `tbot`'s Workload API service:

| Field | Description |
|-------------------|------------------------------------------------------------------------------|
| `unix.attested` | Indicates that the workload has been attested by the Unix Workload Attestor. |
| `unix.attested` | Indicates that the workload has been attested by the Unix Workload Attestor. |
| `unix.pid` | The process ID of the attested workload. |
| `unix.uid` | The effective user ID of the attested workload. |
| `unix.gid` | The effective primary group ID of the attested workload. |

### Support for non-standard /proc mounting

To resolve information about a process from the PID, the Unix Workload Attestor
reads information from the `/proc` filesystem.

In some cases, the `/proc` filesystem may not be mounted at the default
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location. If this is the case, you can configure the Unix Workload Attestor to
read from a different location by setting the `HOST_PROC` environment variable.

This is a sensitive configuration option, and you should ensure that it is
set correctly or not set at all. If misconfigured, an attacker could provide
falsified information about processes, and this could lead to the issuance of
SVIDs to unauthorized workloads.

## Kubernetes

The Kubernetes Workload Attestor allows you to restrict the issuance of SVIDs
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