disable swap for system and user slices

Author: kannon92

jobs/e2e_node/crio/crio_cgroupv2_swap1g.ign

@@ -81,6 +81,11 @@
         "contents": "[Unit]\nDescription=Enable swap on CoreOS\nBefore=crio-install.service\n\n[Service]\nType=oneshot\nExecStart=/bin/sh -c \"sudo dd if=/dev/zero of=/var/swapfile count=1024 bs=1MiB \u0026\u0026 sudo chmod 600 /var/swapfile \u0026\u0026 sudo mkswap /var/swapfile \u0026\u0026 sudo swapon /var/swapfile \u0026\u0026 free -h\"\n\n[Install]\nWantedBy=multi-user.target\n",
         "enabled": true,
         "name": "swap-enable.service"
+      },
+      {
+        "contents": "[Unit]\nDescription=Disable swap\nAfter=disableswap-system.service\n\n[Service]\nType=oneshot\nExecStart=/bin/sh -c \"sudo systemctl set-property system.slice MemorySwapMax=0\"\nExecStart=/bin/sh -c \"sudo systemctl set-property user.slice MemorySwapMax=0\"\n\n[Install]\nWantedBy=multi-user.target\n",
+        "enabled": true,
+        "name": "disable-swap.service"
       }
     ]
   }

jobs/e2e_node/crio/templates/base/swap-1G.yaml

@@ -14,3 +14,18 @@ systemd:
 
         [Install]
         WantedBy=multi-user.target
+    - name: disable-swap.service
+      enabled: true
+      contents: |
+        [Unit]
+        Description=Disable swap
+        After=disableswap-system.service
+
+        [Service]
+        Type=oneshot
+        ExecStart=/bin/sh -c "sudo systemctl set-property system.slice MemorySwapMax=0"
+        ExecStart=/bin/sh -c "sudo systemctl set-property user.slice MemorySwapMax=0"
+
+        [Install]
+        WantedBy=multi-user.target
+

jobs/e2e_node/crio/templates/crio_cgroupv2_swap1g.yaml

@@ -133,5 +133,19 @@ systemd:
         Type=oneshot
         ExecStart=/bin/sh -c "sudo dd if=/dev/zero of=/var/swapfile count=1024 bs=1MiB && sudo chmod 600 /var/swapfile && sudo mkswap /var/swapfile && sudo swapon /var/swapfile && free -h"
 
+        [Install]
+        WantedBy=multi-user.target
+    - name: disable-swap.service
+      enabled: true
+      contents: |
+        [Unit]
+        Description=Disable swap
+        After=disableswap-system.service
+
+        [Service]
+        Type=oneshot
+        ExecStart=/bin/sh -c "sudo systemctl set-property system.slice MemorySwapMax=0"
+        ExecStart=/bin/sh -c "sudo systemctl set-property user.slice MemorySwapMax=0"
+
         [Install]
         WantedBy=multi-user.target

jobs/e2e_node/swap/ubuntu-swap-1G-allocation.yaml

@@ -17,6 +17,8 @@ runcmd:
   - 'chmod 600 /swapfile'
   - 'mkswap /swapfile'
   - 'swapon /swapfile'
+  - 'sudo systemctl set-property system.slice MemorySwapMax=0'
+  - 'sudo systemctl set-property user.slice MemorySwapMax=0'
   - 'echo "/swapfile swap swap defaults 0 0" | tee -a /etc/fstab'
   - 'echo swap files'
   - 'swapon --show'