handle test outcome

deployment/check/data-model/nixosTest.nix

@@ -122,14 +122,27 @@ in
             sshOpts=(
               -o BatchMode=yes
               -o StrictHostKeyChecking=no
+              -o "ConnectionAttempts=1"
+              -o "ConnectTimeout=1"
+              -o "ServerAliveCountMax=1"
+              -o "ServerAliveInterval=1"
             )
             # get the realized derivation to deploy
             outPath=$(nix-store --realize "$drv_path")
             # deploy the config by nix-copy-closure
             NIX_SSHOPTS="''${sshOpts[*]}" nix-copy-closure --to "$host" "$outPath" --gzip --use-substitutes
             # switch the remote host to the config
-            ssh "''${sshOpts[@]}" "$host" "nix-env --profile /nix/var/nix/profiles/system --set $outPath; $outPath/bin/switch-to-configuration switch"
+            output=$(ssh "''${sshOpts[@]}" "$host" "nix-env --profile /nix/var/nix/profiles/system --set $outPath; nohup $outPath/bin/switch-to-configuration switch &" 2>&1) || echo "status code: $?"
+            echo "output: $output"
+            if [[ $output != *"Timeout, server ${nodeName} not responding"* ]]; then
+              echo "non-timeout error: $output"
+              exit 1
+            else
+              exit 0
+            fi
           """)
+          ${nodeName}.wait_for_unit("multi-user.target")
+          ${nodeName}.succeed("systemctl is-active sshd")
           ${nodeName}.succeed("${nodeName} 1>&2")
       '') targetMachines
     )}