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build: Switched to QEMU base image (#1363)

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Kroese
2026-08-10 02:06:17 +02:00
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docs/environment.md
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@@ -56,7 +56,7 @@ An empty default means the variable is unset and its value is determined automat
| `DEV` | `eth0` | Container network interface used as the uplink. |
| `MTU` | | MTU assigned to the guest network interface. |
| `MASK` | `255.255.255.0` | IPv4 netmask for guest network. |
| `TAP` | `dsm` | TAP or macvtap interface name. |
| `TAP` | `qemu` | TAP or macvtap interface name. |
| `BRIDGE` | `docker` | Bridge name used for NAT networking. |
| `HOST_PORTS` | | Ports excluded from guest forwarding. |
| `USER_PORTS` | | Additional ports to forward to DSM when using user-mode networking. |
@@ -76,19 +76,30 @@ An empty default means the variable is unset and its value is determined automat
| `GPU` | `N` | Enables Intel iGPU acceleration. |
| `RENDERNODE` | `/dev/dri/renderD128` | Render node used for GPU acceleration. |
## ⚙️ System
## 🎈 Memory Ballooning
Also see [Dynamic memory allocation](https://github.com/qemus/qemu/blob/master/docs/ballooning.md) for usage instructions and important caveats.
| Variable | Default | Description |
|---|---|---|
| `MACHINE` | `q35` | QEMU machine type. |
| `ARGUMENTS` | | Additional raw arguments appended to the QEMU command line. |
| `BALLOONING` | `N` | Enables dynamic memory ballooning. |
| `BALLOONING_MIN_MEM` | `33%` | Minimum amount of memory retained by the VM. |
| `BALLOONING_RAM_THRESHOLD` | `80.0` | Host RAM usage percentage at which ballooning begins adjusting memory. |
| `BALLOONING_RAM_THRESHOLD_HARD` | `90.0` | Host RAM usage percentage at which ballooning becomes more aggressive. |
| `BALLOONING_PSI_PRESSURE` | `10.0` | PSI memory pressure level at which ballooning becomes more aggressive. |
| `BALLOONING_PSI_PRESSURE_MAX` | `50.0` | PSI memory pressure level at which ballooning reaches its strongest response. |
| `BALLOONING_HYSTERESIS` | `128M` | Minimum memory change before the balloon target is updated. |
| `BALLOONING_KP` | `0.5` | Proportional gain used by the ballooning controller. |
| `BALLOONING_KI` | `0.05` | Integral gain used by the ballooning controller. |
| `BALLOONING_INTERVAL` | `5` | Polling interval in seconds. |
| `BALLOONING_DEBUG` | `N` | Enables debug output for the ballooning monitor. |
## 🔌 Shutdown
| Variable | Default | Description |
|---|---|---|
| `SHUTDOWN` | `Y` | Enables graceful shutdown. |
| `TIMEOUT` | `115` | Maximum time, in seconds, to wait before forcing DSM to stop. |
| `TIMEOUT` | `105` | Maximum time, in seconds, to wait before forcing DSM to stop. |
| `API_TIMEOUT` | `90` | Maximum time, in seconds, to wait for the shutdown API call. |
## 🐞 Debugging
@@ -100,3 +111,4 @@ An empty default means the variable is unset and its value is determined automat
| `HOST_DEBUG` | `N` | Enables debug output for the DSM host helper. |
| `MONITOR` | | QEMU monitor configuration. |
| `QMP` | | QEMU Machine Protocol configuration. |
| `ARGUMENTS` | | Additional raw arguments appended to the QEMU command line. |