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(feature) Add remote host connection preflight

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Add an on-demand host preflight action that verifies SSH reachability,
remote rsync availability, and remote source root access.

Persist the latest preflight result on the host config, render it in Django,
and block real backups when the last remote preflight failed.
This commit is contained in:
Peter van Arkel
2026-05-21 00:50:05 +02:00
parent 64a0ff8322
commit 3045093dcf
5 changed files with 262 additions and 1 deletions
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31
src/pobsync_backend/views.py
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@@ -31,7 +31,7 @@ from .forms import (
)
from .host_ops import ensure_host_directories
from .models import BackupRun, GlobalConfig, HostConfig, ScheduleConfig, SnapshotRecord, SshCredential
from .preflight import collect_backup_gate, effective_host_config_preview
from .preflight import collect_backup_gate, effective_host_config_preview, run_remote_preflight
from .retention import run_sql_retention_apply, run_sql_retention_plan
from .self_check import collect_self_checks, summarize_self_checks
from .scheduler import next_due_after
@@ -280,6 +280,7 @@ def host_detail(request, host: str):
"host_checks": backup_gate.checks,
"host_check_summary": summarize_self_checks(backup_gate.checks),
"backup_gate": backup_gate,
"last_preflight": (host_config.config or {}).get("last_preflight") if isinstance(host_config.config, dict) else {},
"effective_config": effective_host_config_preview(host_config, global_config) if global_config else {},
"stats_summary": stats_summary,
"manual_backup_form": ManualBackupForm(initial=_default_manual_backup_initial(host_config)),
@@ -336,6 +337,34 @@ def scan_host_known_key(request, host: str):
return redirect("host_detail", host=host_config.host)
@staff_member_required
@require_POST
def run_host_preflight(request, host: str):
host_config = get_object_or_404(HostConfig, host=host)
if not host_config.enabled:
messages.error(request, f"Cannot run preflight for disabled host {host_config.host}.")
return redirect("host_detail", host=host_config.host)
if not GlobalConfig.objects.filter(name="default").exists():
messages.error(request, "Create the default global config before running preflight.")
return redirect("host_detail", host=host_config.host)
try:
result = run_remote_preflight(host_config)
except Exception as exc:
messages.error(request, f"Connection preflight failed for {host_config.host}: {exc}")
else:
if result.get("ok"):
messages.success(request, f"Connection preflight passed for {host_config.host}.")
else:
failed = [
str(check.get("name"))
for check in result.get("checks", [])
if isinstance(check, dict) and not check.get("ok")
]
messages.error(request, f"Connection preflight failed for {host_config.host}: {', '.join(failed)}.")
return redirect("host_detail", host=host_config.host)
@staff_member_required
@require_POST
def queue_manual_backup(request, host: str):