92 lines
4.7 KiB
Bash
Executable File
92 lines
4.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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# 強隔離 on this Mac: macOS can't run gVisor directly, and OrbStack/Docker Desktop's Linux VM
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# can't take it. This makes a small Ubuntu VM (Lima, Apple Virtualization) with its OWN Docker
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# and gVisor (runsc): Bot 的電腦 runs there on a virtualized kernel, verified by a sandboxed
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# Chromium — the Mac's kernel is a whole VM away.
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#
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# ./gvisor-vm.sh create + start the VM (idempotent; re-run to fix/update)
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# ./gvisor-vm.sh --rm remove the VM (the box's files live in a volume inside it)
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#
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# Afterwards, in AnyBot 設定 › 電腦 › 在哪裡執行:
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# Docker 主機: ssh://lima-anybot-gvisor
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# 容器隔離: 強隔離（gVisor）
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# and press 更新 on the computer card. (AnyBot's Docker host accepts ssh://, the VNC viewer
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# forwards through it.)
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set -euo pipefail
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VM=anybot-gvisor
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CPUS=4
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MEM=4 # GiB: the box is capped at 2 GB, Docker and the system take ~0.5 GB.
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# The Mac never gets back memory the VM once used, so a bigger VM
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# just grows bigger (it reached all of 6 GB).
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DISK=60 # GiB
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if [ "${1:-}" = "--rm" ]; then
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limactl delete --force "$VM" 2>/dev/null || true
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echo "已移除 VM ${VM}。"
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exit 0
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fi
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command -v limactl >/dev/null 2>&1 || { echo "先裝 Lima：brew install lima"; exit 1; }
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STATUS=$(limactl list "$VM" --format '{{.Status}}' 2>/dev/null || true)
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if [ "$STATUS" = "Running" ]; then
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echo "VM $VM 已在執行。"
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elif [ -n "$STATUS" ]; then
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echo "VM $VM 是 ${STATUS}，啟動中…"
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limactl start --tty=false "$VM"
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else
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echo "建立 VM ${VM}（$CPUS CPU / ${MEM}GB / ${DISK}GB，第一次要下載映像檔，幾分鐘）…"
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# template:docker-rootful = Lima's rootful Docker template (runsc wants a plain root daemon;
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# the rootless docker template runs the daemon in a user namespace).
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limactl start --name="$VM" --tty=false --cpus "$CPUS" --memory "$MEM" --disk "$DISK" template:docker-rootful
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fi
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echo "VM 裡安裝 gVisor（runsc，systrap 平台：不需要 KVM，ARM VM 可用）…"
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limactl shell "$VM" -- bash -ec '
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set -e
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if ! command -v runsc >/dev/null 2>&1; then
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sudo mkdir -p /etc/apt/keyrings
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curl -fsSL https://gvisor.dev/archive.key | sudo gpg --dearmor -o /usr/share/keyrings/gvisor-archive-keyring.gpg
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echo "deb [signed-by=/usr/share/keyrings/gvisor-archive-keyring.gpg] https://storage.googleapis.com/gvisor/releases release main" | sudo tee /etc/apt/sources.list.d/gvisor.list >/dev/null
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sudo apt-get update -qq
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sudo apt-get install -y -qq runsc
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fi
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# Register the runtime in the VM'\''s Docker daemon (merge, do not clobber other settings).
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# Restart Docker only when that changed: a restart stops Bot 的電腦 running in this VM.
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CHANGED=$(sudo python3 - <<EOF
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import json, os
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p = "/etc/docker/daemon.json"
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d = json.load(open(p)) if os.path.exists(p) else {}
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if d.get("runtimes", {}).get("runsc", {}).get("path") != "runsc":
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d.setdefault("runtimes", {})["runsc"] = {"path": "runsc"}
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os.makedirs("/etc/docker", exist_ok=True)
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json.dump(d, open(p, "w"), indent=2)
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print("changed")
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EOF
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)
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if [ "$CHANGED" = changed ]; then sudo systemctl restart docker; fi
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# Services a VM without modems, removable disks or SAN storage never uses (~70 MB).
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sudo systemctl disable --now ModemManager.service udisks2.service multipathd.service multipathd.socket >/dev/null 2>&1 || true
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# Prove the wall works: a container whose kernel really is gVisor.
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docker run --rm --runtime=runsc --entrypoint sh alpine:3.20 -c "grep -q gVisor /proc/version && uname -r" | sed "s/^/runsc 容器核心: /"
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'
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# Bot 的電腦 lives in this VM: start it with the Mac, or after a restart the computer is gone
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# until someone runs this again.
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limactl autostart enable "$VM" >/dev/null 2>&1 || limactl start-at-login "$VM" --enabled >/dev/null 2>&1 || echo "（沒能設定開機自動啟動：Mac 重開機後要再跑一次這個腳本）"
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# Lima forwards the VM's Docker socket to the Mac: AnyBot's Docker 主機用這個 unix:// 位址，
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# 不用 ssh、不用碰 ~/.ssh/config。
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SOCK="$HOME/.lima/$VM/sock/docker.sock"
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DOCKER_HOST="unix://$SOCK" docker info --format '{{range $k, $v := .Runtimes}}{{$k}} {{end}}' | grep -qw runsc || { echo "從 Mac 連到 VM 的 Docker 看不到 runsc"; exit 1; }
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KERNEL=$(DOCKER_HOST="unix://$SOCK" docker run --rm --runtime=runsc --entrypoint cat alpine:3.20 /proc/version | cut -d' ' -f3)
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cat <<EOF
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都好了（從 Mac 驗證：runsc 容器的核心是 ${KERNEL}）。AnyBot 設定 › 電腦 › 在哪裡執行：
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Docker 主機： unix://$SOCK
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容器隔離： 強隔離（gVisor）
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然後在電腦卡片按「建立/更新」。要讓舊 box 的檔案與登入跟著走，
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先完全退出 AnyBot、跑同資料夾的 gvisor-migrate.sh，再回來開。
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EOF
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