mirror of
https://github.com/CloudNebulaProject/zmgr.git
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64 lines
2.2 KiB
Markdown
64 lines
2.2 KiB
Markdown
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# Architecture
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## Overview
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zmgr is a single Rust binary that manages illumos zones via flat KDL config files under `/etc/zmgr`. No daemon, no database — just a CLI that reads configs, calls system commands (`zonecfg`, `zoneadm`, `dladm`), and writes registry entries.
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## Module Layout
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```
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src/
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main.rs CLI entry point (clap), command dispatch
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config.rs Global config (/etc/zmgr/config.kdl)
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template.rs Zone templates (/etc/zmgr/templates/*.kdl)
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pool.rs IPAM pools (/etc/zmgr/pools/*.kdl)
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zone.rs Zone registry (/etc/zmgr/zones/*.kdl)
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publisher.rs IPS publishers (/etc/zmgr/publishers/*.kdl)
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exec.rs System command wrappers (zonecfg, zoneadm, dladm)
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import.rs Import existing zones into registry
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kdl_util.rs KDL document parsing helpers
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error.rs Error types (miette diagnostics)
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```
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## Data Flow
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### Zone Creation (`zmgr create <name>`)
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1. Load global config → get default template name
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2. Load template → get brand, autoboot, pool reference
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3. Load pool → get network, gateway, stub, IP range
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4. Scan zone registry → find allocated IPs
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5. Allocate next free IP from pool range
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6. `dladm create-vnic` → create VNIC on stub
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7. `zonecfg -z <name>` → pipe zone configuration
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8. `zoneadm -z <name> install` → install zone
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9. Write zone registry entry (KDL file)
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10. If autoboot, `zoneadm boot`
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### Zone Import (`zmgr import`)
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1. `zoneadm list -cp` → get system zones
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2. Filter out already-registered and bhyve zones
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3. `zonecfg -z <name> info` → extract config
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4. Match brand → template, IP → pool
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5. Write zone registry entry
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## Dependency Graph
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```
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main.rs
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├── config.rs ← kdl_util.rs, error.rs
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├── template.rs ← kdl_util.rs, error.rs
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├── pool.rs ← kdl_util.rs, error.rs, zone.rs
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├── zone.rs ← kdl_util.rs, error.rs
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├── publisher.rs ← kdl_util.rs, error.rs
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├── exec.rs ← error.rs
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└── import.rs ← exec.rs, pool.rs, template.rs, zone.rs
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```
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## Boundary with vm-manager
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zmgr manages **zone brands** (ipkg, nlipkg, etc.) — native illumos zones.
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vm-manager manages **bhyve** brand zones — virtual machines.
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Import logic skips bhyve zones to avoid overlap.
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