refactor: improve installation reliability

This change aims to make installations more unified and reliable. It
introduces the concept of a mountpoint manager that is capable of
mounting, unmounting, and moving a set of mountpoints in the correct
order.

Signed-off-by: Andrew Rynhard <andrew@andrewrynhard.com>

internal/pkg/proc/proc.go

@@ -6,26 +6,12 @@ package proc
 
 import (
 	"fmt"
-	"io/ioutil"
-	"path"
 	"strings"
 
 	"code.cloudfoundry.org/bytefmt"
 	"github.com/prometheus/procfs"
 )
 
-// SystemProperty represents a kernel system property.
-type SystemProperty struct {
-	Key   string
-	Value string
-}
-
-// WriteSystemProperty writes a value to a key under /proc/sys.
-func WriteSystemProperty(prop *SystemProperty) error {
-	keyPath := path.Join("/proc/sys", strings.Replace(prop.Key, ".", "/", -1))
-	return ioutil.WriteFile(keyPath, []byte(prop.Value), 0644)
-}
-
 // ProcessList contains all of the process stats we want
 // to display via top
 type ProcessList struct {