Merge pull request #596 from Kern--/no-cgroupv2

Disable cgroups v2 in our getting started guides

Author: Kern--

docs/getting-started.md

@@ -247,7 +247,7 @@ configuration file has the following fields:
 {
   "firecracker_binary_path": "/usr/local/bin/firecracker",
   "kernel_image_path": "/var/lib/firecracker-containerd/runtime/hello-vmlinux.bin",
-  "kernel_args": "console=ttyS0 noapic reboot=k panic=1 pci=off nomodules ro systemd.journald.forward_to_console systemd.unit=firecracker.target init=/sbin/overlay-init",
+  "kernel_args": "console=ttyS0 noapic reboot=k panic=1 pci=off nomodules ro systemd.unified_cgroup_hierarchy=0 systemd.journald.forward_to_console systemd.unit=firecracker.target init=/sbin/overlay-init",
   "root_drive": "/var/lib/firecracker-containerd/runtime/default-rootfs.img",
   "cpu_template": "T2",
   "log_fifo": "fc-logs.fifo",

docs/logging.md

@@ -9,7 +9,7 @@ firecracker-runtime.json file.
 {
   "firecracker_binary_path": "/usr/local/bin/firecracker",
   "kernel_image_path": "/var/lib/firecracker-containerd/runtime/default-vmlinux.bin",
-  "kernel_args": "ro console=ttyS0 noapic reboot=k panic=1 pci=off nomodules systemd.journald.forward_to_console systemd.unit=firecracker.target init=/sbin/overlay-init",
+  "kernel_args": "ro console=ttyS0 noapic reboot=k panic=1 pci=off nomodules systemd.unified_cgroup_hierarchy=0 systemd.journald.forward_to_console systemd.unit=firecracker.target init=/sbin/overlay-init",
   "root_drive": "/var/lib/firecracker-containerd/runtime/default-rootfs.img",
   "cpu_template": "T2",
   "log_levels": ["debug"],
@@ -48,7 +48,7 @@ info, error, warning, and debug are mutually exclusive and only one can be set a
 {
   "firecracker_binary_path": "/usr/local/bin/firecracker",
   "kernel_image_path": "/var/lib/firecracker-containerd/runtime/default-vmlinux.bin",
-  "kernel_args": "ro console=ttyS0 noapic reboot=k panic=1 pci=off nomodules systemd.journald.forward_to_console systemd.unit=firecracker.target init=/sbin/overlay-init",
+  "kernel_args": "ro console=ttyS0 noapic reboot=k panic=1 pci=off nomodules systemd.unified_cgroup_hierarchy=0 systemd.journald.forward_to_console systemd.unit=firecracker.target init=/sbin/overlay-init",
   "root_drive": "/var/lib/firecracker-containerd/runtime/default-rootfs.img",
   "cpu_template": "T2",
   "log:levels": ["info","firecracker:debug","firecracker-containerd:error"],

docs/quickstart.md

@@ -214,7 +214,7 @@ sudo tee /etc/containerd/firecracker-runtime.json <<EOF
   "log_fifo": "fc-logs.fifo",
   "log_levels": ["debug"],
   "metrics_fifo": "fc-metrics.fifo",
-  "kernel_args": "console=ttyS0 noapic reboot=k panic=1 pci=off nomodules ro systemd.journald.forward_to_console systemd.unit=firecracker.target init=/sbin/overlay-init",
+  "kernel_args": "console=ttyS0 noapic reboot=k panic=1 pci=off nomodules ro systemd.unified_cgroup_hierarchy=0 systemd.journald.forward_to_console systemd.unit=firecracker.target init=/sbin/overlay-init",
   "default_network_interfaces": [{
     "CNIConfig": {
       "NetworkName": "fcnet",