Adding a sampler for the krb5kdc binary. #241
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- The krb5_error_code is actually the second parameter to each function - Clean up some of the extra bpf code - krb5_error_code is actually an old format and needed to be translated based on the u64 put on the stack for the function call.
brayniac
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Sep 14, 2021
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Provides telemetry to track MIT kerberos ticket requests served by the krb5kdc binary. This is accomplished by attaching user space probes to the following functions: finish_process_as_req, finish_dispatch_cache and process_tgs_req. Each function exports a call count that is broken down by the resulting error code. Since there is a very large list of possible error codes, the first 30 error codes are exported. All other error code values are exported as UNKNOWN.
Each error code is reformatted to better fit metric naming standards: "KRB5KDC_ERR_BAD_PVNO" -> "bad_pvno"
krb5kdc/finish_process_as_req/{ERROR_CODE} - count of finish_process_as_req calls by error
krb5kdc/finish_dispatch_cache/{ERROR_CODE} - count of finish_dispatch_cache calls by error
krb5kdc/process_tgs_req/{ERROR_CODE} - count of process_tgs_req calls by error