Nexus Agent
82 lines
2.6 KiB
Python
82 lines
2.6 KiB
Python
"""Install psutil on managed servers via SSH (system Python for watch probe)."""
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from __future__ import annotations
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from server.application.server_batch_common import sudo_wrap
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from server.domain.models import Server
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from server.infrastructure.ssh.asyncssh_pool import exec_ssh_command
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# Try --user pip, then distro packages, then system pip. Verify with same python3 as watch probe.
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PSUTIL_INSTALL_SHELL = r"""
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set -e
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verify_psutil() {
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for py in python3 python3.12 python3.11 python3.10; do
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if command -v "$py" >/dev/null 2>&1 && "$py" -c "import psutil" 2>/dev/null; then
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echo psutil_ok
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exit 0
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fi
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done
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return 1
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}
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verify_psutil || true
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for py in python3 python3.12 python3.11 python3.10; do
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command -v "$py" >/dev/null 2>&1 || continue
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if "$py" -m pip install --user -q psutil 2>/dev/null; then
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verify_psutil && exit 0
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fi
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done
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if command -v apt-get >/dev/null 2>&1; then
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apt-get update -qq && DEBIAN_FRONTEND=noninteractive apt-get install -y -qq python3-psutil \
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&& verify_psutil && exit 0
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fi
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if command -v dnf >/dev/null 2>&1; then
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dnf install -y -q python3-psutil && verify_psutil && exit 0
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fi
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if command -v yum >/dev/null 2>&1; then
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yum install -y -q python3-psutil && verify_psutil && exit 0
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fi
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for py in python3 python3.12 python3.11 python3.10; do
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command -v "$py" >/dev/null 2>&1 || continue
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if "$py" -m pip install -q psutil 2>/dev/null; then
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verify_psutil && exit 0
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fi
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done
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echo "ERROR: psutil install failed — pip/apt unavailable or permission denied" >&2
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exit 1
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"""
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def build_psutil_install_cmd(*, ssh_user: str) -> str:
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return sudo_wrap(PSUTIL_INSTALL_SHELL.strip(), ssh_user)
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async def install_psutil_via_ssh(server: Server, *, timeout: int = 90) -> dict[str, str | int]:
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"""Run remote install; returns {exit_code, stdout, stderr, already_installed?}."""
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ssh_user = (server.username or "root").strip()
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cmd = build_psutil_install_cmd(ssh_user=ssh_user)
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result = await exec_ssh_command(server, cmd, timeout=timeout)
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stdout = (result.get("stdout") or "").strip()
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stderr = (result.get("stderr") or "").strip()
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raw_exit = result.get("exit_code")
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exit_code = int(raw_exit) if raw_exit is not None else 1
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if exit_code == 0 and "psutil_ok" in stdout:
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return {
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"success": True,
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"exit_code": 0,
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"stdout": stdout[:2000],
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"stderr": stderr[:500],
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"message": "psutil 已就绪",
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}
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detail = stderr or stdout or f"exit {exit_code}"
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return {
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"success": False,
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"exit_code": exit_code,
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"stdout": stdout[:2000],
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"stderr": stderr[:500],
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"message": detail[:300],
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}
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