Add critical safety guards to temperature proxy installation
After implementing the health gate, added comprehensive safety measures to prevent the health checks themselves from becoming a new failure point. **Problem**: Previous commit added strict health checks but could fail in edge cases: - `pct exec` could hang if container stopped/frozen → installer deadlocks - systemctl/journalctl might not be available → diagnostics fail - Container access check could fail for transient reasons - pvecm error detection was fragile (string matching specific messages) **Solutions Implemented**: 1. **Timeouts on All External Commands** (install.sh:1596,1618) - `timeout 5` on systemctl checks - `timeout 10` on pct exec checks - Prevents installer from hanging indefinitely 2. **Graceful Degradation** (install.sh:1602-1630) - Check for systemctl/pct availability before using - Warn if tools missing instead of failing - Container check is warning-only (may be transient) - Only fail on critical checks: service running, socket exists 3. **Bypass Flag Support** (install.sh:1589-1594) - Set `PULSE_SKIP_HEALTH_CHECKS=1` to bypass all checks - Documented in error messages for troubleshooting - Allows installation in unsupported environments 4. **Flexible Diagnostics** (install.sh:1640-1647) - Use journalctl if available, fallback to syslog - Conditional tool-specific advice 5. **Broader Error Detection** (ssh.go:582-628) - List of 14 standalone indicators (vs 5 hardcoded checks) - Case-insensitive matching for localization tolerance - Permissive strategy: treat any known pattern as standalone - Handles variations: "no cluster", "IPC", "connection refused", etc. 6. **Enhanced Test Coverage** (ssh_test.go:+35 lines) - Added 3 new test cases (variation patterns) - Tests now cover 8 standalone scenarios + 3 negative cases - All tests pass (11/11) **Impact**: - Health gate won't block installation in edge cases - Better user experience on non-standard setups - Standalone detection handles more error message variations - Clear escape hatch for troubleshooting (bypass flag) **Confidence Level**: High - All tests pass (bash syntax + Go unit tests) - Graceful fallbacks for every external command - Only critical checks are hard failures - Warnings guide users through validation issues Related to #571
This commit is contained in:
rcourtman
parent
4f2e9055cd
commit
8e993ea901
3 changed files with 136 additions and 39 deletions
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@ -579,23 +579,51 @@ func discoverClusterNodes() ([]string, error) {
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stdoutStr := out.String()
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combinedOutput := stderrStr + stdoutStr
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// Check if this is a standalone node or LXC container
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// - "does not exist" or "not part of a cluster": standalone node
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// - "ipcc_send_rec": running in LXC container without corosync access
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// - "Unknown error -1": LXC container corosync communication failure
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// - "Unable to load access control list": Permission/access issues in containers
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// Note: Some Proxmox versions write these messages to stdout, others to stderr
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if strings.Contains(combinedOutput, "does not exist") ||
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strings.Contains(combinedOutput, "not part of a cluster") ||
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strings.Contains(combinedOutput, "ipcc_send_rec") ||
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strings.Contains(combinedOutput, "Unknown error -1") ||
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strings.Contains(combinedOutput, "Unable to load access control list") {
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// Broadly detect standalone/container scenarios by checking for known patterns
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// This list comes from real user reports and should handle localization/version differences
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//
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// Common patterns that indicate standalone/container operation:
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// - Configuration missing: "does not exist", "not found", "no such file"
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// - Cluster state: "not part of a cluster", "no cluster", "standalone"
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// - IPC failures: "ipcc_send_rec", "IPC", "communication failed"
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// - Permission/access: "Unknown error -1", "Unable to load", "access denied", "permission denied"
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//
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// Strategy: Be permissive - if pvecm fails with any of these common patterns,
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// assume standalone and fall back to localhost. This is safer than false negatives.
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standaloneIndicators := []string{
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// Configuration issues
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"does not exist", "not found", "no such file",
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// Cluster state
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"not part of a cluster", "no cluster", "standalone",
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// IPC/communication failures (common in LXC)
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"ipcc_send_rec", "IPC", "communication failed", "connection refused",
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// Permission/access issues
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"Unknown error -1", "Unable to load", "access denied", "permission denied",
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"access control list",
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}
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isStandalone := false
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for _, indicator := range standaloneIndicators {
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if strings.Contains(strings.ToLower(combinedOutput), strings.ToLower(indicator)) {
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isStandalone = true
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break
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}
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}
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if isStandalone {
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// Log at INFO level since this is expected for standalone/container scenarios
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log.Info().Msg("Standalone Proxmox node or LXC container detected - using localhost for temperature collection")
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log.Info().
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Str("exit_code", fmt.Sprintf("%v", err)).
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Msg("Standalone Proxmox node or LXC container detected - using localhost for temperature collection")
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return discoverLocalHostAddresses()
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}
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// For other unexpected errors, fail with details
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log.Warn().Str("stderr", stderrStr).Str("stdout", stdoutStr).Msg("pvecm status failed with unexpected error")
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// For truly unexpected errors (rare), fail with full context for debugging
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log.Warn().
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Err(err).
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Str("stderr", stderrStr).
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Str("stdout", stdoutStr).
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Msg("pvecm status failed with unexpected error - please report this if temperature monitoring doesn't work")
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return nil, fmt.Errorf("failed to get cluster status: %w (stderr: %s, stdout: %s)", err, stderrStr, stdoutStr)
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}
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@ -250,18 +250,41 @@ func TestStandaloneNodeErrorPatterns(t *testing.T) {
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stderr: "",
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issueNo: "#571",
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},
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{
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name: "no cluster keyword",
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stderr: "Error: no cluster configuration\n",
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stdout: "",
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issueNo: "variation",
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},
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{
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name: "IPC failure variant",
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stderr: "IPC communication error\n",
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stdout: "",
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issueNo: "variation",
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},
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}
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// Use the same detection logic as the actual code
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standaloneIndicators := []string{
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"does not exist", "not found", "no such file",
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"not part of a cluster", "no cluster", "standalone",
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"ipcc_send_rec", "IPC", "communication failed", "connection refused",
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"Unknown error -1", "Unable to load", "access denied", "permission denied",
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"access control list",
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}
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for _, tc := range standalonePatterns {
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t.Run(tc.name, func(t *testing.T) {
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combinedOutput := tc.stderr + tc.stdout
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// Check each detection pattern we added
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isStandalone := strings.Contains(combinedOutput, "does not exist") ||
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strings.Contains(combinedOutput, "not part of a cluster") ||
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strings.Contains(combinedOutput, "ipcc_send_rec") ||
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strings.Contains(combinedOutput, "Unknown error -1") ||
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strings.Contains(combinedOutput, "Unable to load access control list")
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// Check using the permissive detection strategy
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isStandalone := false
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for _, indicator := range standaloneIndicators {
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if strings.Contains(strings.ToLower(combinedOutput), strings.ToLower(indicator)) {
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isStandalone = true
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break
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}
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}
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if !isStandalone {
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t.Errorf("Failed to detect standalone/LXC pattern from %s:\n stderr: %q\n stdout: %q",
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84
install.sh
84
install.sh
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@ -1585,17 +1585,30 @@ fi'; then
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if bash "$proxy_script" "${proxy_install_args[@]}" 2>&1 | tee /tmp/proxy-install-${CTID}.log; then
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print_info "Temperature proxy installation script completed"
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# Verify proxy is actually working
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echo
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print_info "Verifying temperature proxy health..."
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local proxy_health_ok=true
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# Check 1: Service is running
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if ! systemctl is-active --quiet pulse-sensor-proxy 2>/dev/null; then
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print_error "✗ Service not running"
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proxy_health_ok=false
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# Check if health checks should be skipped
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if [[ "${PULSE_SKIP_HEALTH_CHECKS:-}" == "1" ]]; then
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print_warn "⚠ Health checks skipped (PULSE_SKIP_HEALTH_CHECKS=1)"
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print_warn " Temperature monitoring may not work correctly"
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print_warn " Verify manually: systemctl status pulse-sensor-proxy"
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echo
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else
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print_info "✓ Service running"
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# Verify proxy is actually working (with graceful fallbacks)
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echo
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print_info "Verifying temperature proxy health..."
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local proxy_health_ok=true
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local health_warnings=()
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# Check 1: Service is running (with timeout)
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if command -v systemctl >/dev/null 2>&1; then
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if timeout 5 systemctl is-active --quiet pulse-sensor-proxy 2>/dev/null; then
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print_info "✓ Service running"
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else
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print_error "✗ Service not running"
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proxy_health_ok=false
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fi
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else
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print_warn "⚠ systemctl not available - skipping service check"
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health_warnings+=("systemctl not available")
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fi
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# Check 2: Socket exists
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@ -1606,27 +1619,60 @@ fi'; then
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print_info "✓ Socket exists"
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fi
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# Check 3: Socket is accessible from container
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if ! pct exec $CTID -- test -S /mnt/pulse-proxy/pulse-sensor-proxy.sock 2>/dev/null; then
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print_error "✗ Socket not visible inside container at /mnt/pulse-proxy/pulse-sensor-proxy.sock"
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print_error " Bind mount may not be configured correctly"
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proxy_health_ok=false
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# Check 3: Socket is accessible from container (with timeout and fallback)
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if command -v pct >/dev/null 2>&1; then
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# Use timeout to prevent hanging if container is stopped/frozen
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if timeout 10 pct exec $CTID -- test -S /mnt/pulse-proxy/pulse-sensor-proxy.sock 2>/dev/null; then
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print_info "✓ Socket accessible from container"
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else
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# Don't fail immediately - container might be stopped or not fully booted
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print_warn "⚠ Could not verify socket accessibility from container"
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print_warn " This may be normal if container is stopped or not fully started"
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print_warn " Socket will be checked when container starts"
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health_warnings+=("container socket check failed (may be transient)")
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fi
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else
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print_info "✓ Socket accessible from container"
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print_warn "⚠ pct command not available - skipping container socket check"
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health_warnings+=("pct not available")
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fi
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# Only fail if critical checks failed (service or socket on host)
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if [[ "$proxy_health_ok" != "true" ]]; then
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echo
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print_error "Temperature proxy health check failed"
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print_error "See diagnostics above and logs: /tmp/proxy-install-${CTID}.log"
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print_error ""
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print_error "Check: systemctl status pulse-sensor-proxy"
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print_error "Check: journalctl -u pulse-sensor-proxy -n 50"
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# Provide actionable diagnostics if tools are available
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if command -v systemctl >/dev/null 2>&1; then
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print_error "Check: systemctl status pulse-sensor-proxy"
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fi
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if command -v journalctl >/dev/null 2>&1; then
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print_error "Check: journalctl -u pulse-sensor-proxy -n 50"
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else
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print_error "Check: cat /var/log/syslog | grep pulse-sensor-proxy"
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fi
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print_error ""
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print_error "To bypass health checks (not recommended): Set PULSE_SKIP_HEALTH_CHECKS=1"
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echo
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exit 1
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fi
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print_success "Temperature proxy is healthy and ready"
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# Show warnings summary if any
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if [[ ${#health_warnings[@]} -gt 0 ]]; then
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echo
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print_warn "Health check completed with warnings:"
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for warning in "${health_warnings[@]}"; do
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print_warn " - $warning"
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done
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print_info "Proxy installed but some checks could not be verified"
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print_info "Temperature monitoring may still work correctly"
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echo
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fi
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print_success "Temperature proxy is healthy and ready"
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fi # End of health checks
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# Clean up temporary binary if it was copied
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[[ -f "$local_proxy_binary" ]] && rm -f "$local_proxy_binary"
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else
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