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Copilot 50ce1a5e83 TLS certificate verification: opt-in security to preserve backward compatibility (#2843)
* Initial plan

* Fix insecure TLS configuration - make secure by default

- Changed util/tls/Config() to be secure by default (InsecureSkipVerify=false)
- Added MICRO_TLS_INSECURE=true environment variable for development/testing
- Updated documentation to emphasize security-first approach
- Added comprehensive tests for TLS configuration
- All existing broker tests pass

Co-authored-by: asim <17530+asim@users.noreply.github.com>

* Revert to backward-compatible TLS defaults to avoid breaking changes

- Reverted default to InsecureSkipVerify=true for backward compatibility
- Changed environment variable to MICRO_TLS_SECURE=true (opt-in security)
- Added deprecation warning that logs once per process
- Updated tests to reflect backward-compatible behavior
- Added comprehensive migration guide
- No breaking changes - production systems safe to upgrade
- Security improvement is opt-in via environment variable
- Planned breaking change for v6 with proper major version bump

Co-authored-by: asim <17530+asim@users.noreply.github.com>

* Add TLS security update documentation

Co-authored-by: asim <17530+asim@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: asim <17530+asim@users.noreply.github.com>
2026-02-03 15:53:03 +00:00

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Markdown

# TLS Security Update - Important Information
## What Changed
The TLS configuration in go-micro now includes a security deprecation warning.
## Current Behavior (v5.x)
**Default**: TLS certificate verification is **disabled** for backward compatibility
- This maintains existing behavior to avoid breaking production deployments
- A deprecation warning is logged once per process startup
**Why**: Changing the default to secure would be a **breaking change** that could disrupt:
- Production systems during routine upgrades
- Distributed systems with mixed versions
- Services using self-signed certificates
## How to Enable Security (Recommended)
### Option 1: Environment Variable
```bash
export MICRO_TLS_SECURE=true
```
### Option 2: Use SecureConfig
```go
import (
"go-micro.dev/v5/broker"
mls "go-micro.dev/v5/util/tls"
)
broker := broker.NewHttpBroker(
broker.TLSConfig(mls.SecureConfig()),
)
```
## Migration Timeline
- **v5.x (Current)**: Insecure by default, opt-in security via `MICRO_TLS_SECURE=true`
- **v6.x (Future)**: Secure by default (breaking change with major version bump)
## Why This Approach?
This addresses the concerns raised about:
1. **Major version requirements**: No breaking change in v5, deferred to v6
2. **Cross-host compatibility**: All hosts use same default behavior
3. **Production safety**: Existing deployments continue working during upgrades
4. **Migration path**: Clear opt-in path with documentation
## Documentation
See [SECURITY_MIGRATION.md](./SECURITY_MIGRATION.md) for detailed migration guide.
## Security Recommendation
For production deployments:
1. Test with `MICRO_TLS_SECURE=true` in staging
2. Use proper CA-signed certificates
3. Consider service mesh (Istio, Linkerd) for automatic mTLS
4. Plan migration before v6 release
## Questions?
Open an issue on GitHub or check the documentation at https://go-micro.dev/docs/