📖 ~1 min read
Table of contents
Symptom & Impact
yum cannot download metadata or packages over HTTPS, blocking urgent patch deployment.
Environment & Reproduction
RHEL 7 host accesses private repo endpoint and reports TLS certificate verify failed.
Root Cause Analysis
Repository certificate expired or intermediate CA chain is missing on client trust store.
Quick Triage
Check system time sync, test endpoint with openssl, and inspect yum verbose output for handshake details.
Step-by-Step Diagnosis
Validate server certificate expiry, chain order, and client CA bundle freshness before changing repo policy.
Solution – Primary Fix
Renew repository certificate, update ca-certificates on host via yum from trusted mirror, and retry transaction.
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Solution – Alternative Approaches
Temporarily use internal mirror with valid cert chain while primary endpoint is remediated.
Verification & Acceptance Criteria
yum repolist and update succeed with TLS verification fully enabled.
Rollback Plan
Revert repository endpoint change and restore previous trust bundle snapshot if compatibility issues occur.
Prevention & Hardening
Monitor certificate expiry for repo infrastructure and enforce automated renewal alerts.
Related Errors & Cross-Refs
Related to chronyd drift, proxy interception, and GPG signature mismatch incidents.
Related tutorial: View the step-by-step tutorial for rhel-7.
View all rhel-7 tutorials on the Tutorials Hub →
Browse all common problems & solutions on the Tutorials Hub.
References & Further Reading
Review RHEL package security, certificate trust management, and yum repository transport guidance.
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