Feature Matrix
Legend:
- ✅: Fully supported.
- ☑️: In preview or partially supported.
- 🔜: Planned feature. Not implemented yet.
- ⚠️: Refer to relevant notes for details.
- ❌: Not supported.
Servicing Features
| Category | Feature | Install | VM-Init | Update | Stream Disk |
|---|---|---|---|---|---|
| 🚀 Runtime | Native binary | ✅ | ✅ | ✅ | ✅ |
| 🚀 Runtime | Containerized | ✅ | ❌ | ✅ | ✅ |
| 🚀 Runtime | gRPC API | 🔜 | ❌ | 🔜 | ✅ |
| ⚙️ Bootloader | UEFI [1] | ✅ | ✅ | ✅ | ✅ |
| ⚙️ Bootloader | GPT partitioning | ✅ | ✅ | ✅ | ✅ |
| ⚙️ Bootloader | Grub2 | ✅ | ✅ | ✅ | ✅ |
| ⚙️ Bootloader | Systemd-boot | ☑️ | ☑️ | ☑️ | ✅ |
| 🔄 Lifecycle | Onboard system for updates | ✅ | ✅ | ✅ | ❌ |
| 🔄 Lifecycle | Rollback (grub) | ✅ | ✅ | ✅ | ❌ |
| 🔄 Lifecycle | Rollback (systemd-boot/UKI) | 🔜 | 🔜 | 🔜 | ❌ |
| 🔏 Integrity | Secure Boot | ✅ | ✅ | ✅ | ✅ |
| 🔏 Integrity | UKI | ☑️ | ☑️ | ☑️ | ✅ |
| 🔏 Integrity | Root-verity (grub) | ⚠️[2] | ⚠️[2] | ⚠️[2] | ✅ |
| 🔏 Integrity | Root-verity (UKI) | ☑️ | ☑️ | ☑️ | ✅ |
| 🔏 Integrity | User-verity (UKI) | ☑️ | ☑️ | ☑️ | ✅ |
| 💽 Storage | Block device creation | ✅ | 🔜 | ❌ | ✅ |
| 💽 Storage | Image streaming (local) | ✅ | 🔜 | ✅ | ✅ |
| 💽 Storage | Image streaming (HTTPS) | ✅ | 🔜 | ✅ | ✅ |
| 💽 Storage | Multiboot | ☑️ | ❌ | ✅[3] | ❌ |
| 💽 Storage | Partition adoption | ☑️ | ❌ | ✅[3] | ❌ |
| 💽 Storage | Software RAID | ✅ | ❌ | ✅[3] | ❌ |
| 💽 Storage | ESP redundancy | ✅ | ❌ | ✅[3] | ❌ |
| 💽 Storage | Encryption with Secure Boot PCR sealing | ✅ | 🔜 | ✅[3] | ❌ |
| 💽 Storage | Encryption with OS PCR sealing | 🔜[4] | 🔜 | ✅[3] | ❌ |
| 📝 OS Config | Network configuration | ✅ | ❌ | ✅ | ❌ |
| 📝 OS Config | Hostname configuration | ✅[5] | ❌ | ✅[5] | ❌ |
| 📝 OS Config | User configuration | ✅[5] | ❌ | ✅[5] | ❌ |
| 📝 OS Config | SSH configuration | ✅[5] | ❌ | ✅[5] | ❌ |
| 📝 OS Config | Initrd regeneration (grub) | ✅ | ❌ | ✅ | ❌ |
| 📝 OS Config | Initrd regeneration (UKI) | ❌ | ❌ | ❌ | ❌ |
| 🛡️ Security | SELinux Configuration | ✅ | ❌ | ✅ | ❌ |
| 🪛 Customization | User provided-scripts | ✅ | ❌ | ✅ | 🔜 |
| 🛠️ Development | Offline validation | ✅ | 🔜 | 🔜 | ❌ |
| 🛠️ Development | Debugging log | ✅ | ✅ | ✅ | ✅ |
For more information, see:
Notes:
- [1] Trident exclusively supports UEFI booting. BIOS booting is not supported.
- [2] Root-verity is supported with grub, but support for this feature will be deprecated soon.
- [3] A system installed with these features can be updated, but the features themselves cannot be activated during an update.
- [4] Currently, different sets of PCRs are valid, depending on the type of the target OS image. Please reference the PCRs API for details.
- [5] This feature cannot be used in conjunction with root-verity.
Out-of-Band Features
These are features that exist outside of the normal servicing flows in Trident.
| Category | Feature | Status | Notes |
|---|---|---|---|
| 💽 Storage | RAID Rebuild | ✅ | Rebuild a software RAID array after a physical drive replacement. |