Ubuntu 14.04 LTS Docker Daemon Fails Due to cgroup Issues

📖 ~1 min read

Table of contents

1. Symptom & Impact
2. Environment & Reproduction
3. Root Cause Analysis
4. Quick Triage
5. Step-by-Step Diagnosis
6. Solution – Primary Fix
7. Solution – Alternative Approaches
8. Verification & Acceptance Criteria
9. Rollback Plan
10. Prevention & Hardening
11. Related Errors & Cross-Refs
12. References & Further Reading

Symptom & Impact

Container workloads fail to start because daemon cannot initialize resource control subsystems.

Environment & Reproduction

Appears on legacy kernels or hosts with incomplete cgroup mounts.

Root Cause Analysis

Kernel feature mismatch and missing cgroup hierarchies prevent daemon startup sequence.

Quick Triage

Inspect docker logs and verify mounted cgroup controllers on the host.

Step-by-Step Diagnosis

Confirm kernel cmdline settings and required controller availability.

Solution – Primary Fix

Enable required cgroup options, remount controllers, and restart docker daemon.

Solution – Alternative Approaches

Pin compatible docker engine build or migrate workloads to supported host OS.

Verification & Acceptance Criteria

Daemon stays active and sample containers start, stop, and report healthy states.

Rollback Plan

Revert daemon config and kernel flags if container runtime stability declines.

Prevention & Hardening

Validate cgroup prerequisites during host provisioning and pre-upgrade checks.

Related Errors & Cross-Refs

Error mounting cgroup, driver failed programming external connectivity, and startup timeout.

Related tutorial: View the step-by-step tutorial for Ubuntu 14.04 LTS.

View all Ubuntu 14.04 LTS tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Docker engine docs and kernel cgroup subsystem references.