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Chapter 2. Using FIPS mode with MicroShift
You can use FIPS mode with RPM-based installations of MicroShift on Red Hat Enterprise Linux (RHEL) 9.
- To enable FIPS mode in MicroShift containers, the worker machine kernel must be enabled to run in FIPS mode before the machine starts.
- Using FIPS with Red Hat Enterprise Linux for Edge (RHEL for Edge) images is not supported.
2.1. FIPS mode with RHEL RPM-based installations
Using FIPS with MicroShift requires enabling the cryptographic module self-checks in your Red Hat Enterprise Linux (RHEL) installation. After the host operating system has been configured to start with the FIPS modules, MicroShift containers are automatically enabled to run in FIPS mode.
- When RHEL is started in FIPS mode, MicroShift core components use the RHEL cryptographic libraries that have been submitted to NIST for FIPS 140-2/140-3 validation on only the x86_64 architectures.
You must enable FIPS mode when you install RHEL 9 on the machines that you plan to use as worker machines.
ImportantBecause FIPS must be enabled before the operating system that your cluster uses starts for the first time, you cannot enable FIPS after you deploy a cluster.
- MicroShift uses a FIPS-compatible Golang compiler.
- FIPS is supported in the CRI-O container runtime.
2.1.1. Limitations
- TLS implementation FIPS support is not complete.
- The FIPS implementation does not offer a single function that both computes hash functions and validates the keys that are based on that hash. This limitation continues to be evaluated for improvement in future MicroShift releases.
2.1.2. Installing RHEL in FIPS mode
To install RHEL with FIPS, follow the guidance in the Installing the system in FIPS mode of the RHEL documentation.
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