Remove ramdisk config

config.yaml

@@ -41,12 +41,6 @@ options:
     description: >
       Amount of disk space to allocate to root disk for virtual machine runner. Positive integers
       with KiB, MiB, GiB, TiB, PiB, EiB suffix.
-  ram-disk:
-    type: boolean
-    default: false
-    description: >
-      Whether to use system memory as the disk for the runners. The amount of memory allocated for
-      this would be the disk space per runner multiple by the number of runners.
   reconcile-interval:
     type: int
     default: 10

src/charm.py

@@ -32,12 +32,7 @@
 from github_type import GitHubRunnerStatus
 from runner_manager import RunnerManager, RunnerManagerConfig
 from runner_type import GitHubOrg, GitHubRepo, ProxySetting, VirtualMachineResources
-from utilities import (
-    execute_command,
-    get_env_var,
-    retry,
-    secure_run_subprocess,
-)
+from utilities import execute_command, get_env_var, retry, secure_run_subprocess
 
 if TYPE_CHECKING:
     from ops.model import JsonObject  # pragma: no cover
@@ -160,7 +155,7 @@ def __init__(self, *args, **kargs) -> None:
         self.framework.observe(self.on.flush_runners_action, self._on_flush_runners_action)
         self.framework.observe(self.on.update_runner_bin_action, self._on_update_runner_bin)
 
-    def _ensure_ramdisk_lvm_volume_group_exist(self, size: int = 10485760) -> str:
+    def _ensure_ramdisk_lvm_volume_group_exist(self) -> str:
         """Create a ramdisk as a LVM volume group if needed.
 
         Args:
@@ -171,12 +166,10 @@ def _ensure_ramdisk_lvm_volume_group_exist(self, size: int = 10485760) -> str:
         """
         vg_name = "ramdisk_pool"
 
-        # execute_command(["rmmod", "brd"])
-
         # Check if ramdisk at /dev/ram0 exists.
         result = secure_run_subprocess(["test", "-e", "/dev/ram0"])
         if result.returncode != 0:
-            execute_command(["modprobe", "brd", f"rd_size={size}", "rd_nr=1"])
+            execute_command(["modprobe", "brd", "rd_nr=1"])
 
         # Check if volume group exits.
         result = secure_run_subprocess(["vgdisplay", vg_name])