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fix: detect and handle immutable filesystems like Fedora Silverblue (#1405)

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This commit is contained in:
Arush Wadhawan
2025-11-14 14:03:26 -05:00
committed by GitHub
parent 779dcc62aa
commit 79adfd2c0d
2 changed files with 43 additions and 3 deletions
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37
agent/agent.go
View File

@@ -229,3 +229,40 @@ func (a *Agent) getFingerprint() string {
return fingerprint
}
// getRootMountPoint returns the appropriate root mount point for the system
// For immutable systems like Fedora Silverblue, it returns /sysroot instead of /
func (a *Agent) getRootMountPoint() string {
// Check for typical immutable system indicators
// 1. Check if /etc/os-release contains indicators of an immutable system
if osReleaseContent, err := os.ReadFile("/etc/os-release"); err == nil {
content := string(osReleaseContent)
// Look for indicators of atomic/immutable systems
if strings.Contains(content, "fedora") && strings.Contains(content, "silverblue") ||
strings.Contains(content, "coreos") ||
strings.Contains(content, "flatcar") ||
strings.Contains(content, "rhel-atomic") ||
strings.Contains(content, "centos-atomic") {
// Verify that /sysroot exists before returning it
if _, err := os.Stat("/sysroot"); err == nil {
return "/sysroot"
}
}
}
// 2. Check if /run/ostree is present (ostree-based systems like Silverblue)
if _, err := os.Stat("/run/ostree"); err == nil {
// Verify that /sysroot exists before returning it
if _, err := os.Stat("/sysroot"); err == nil {
return "/sysroot"
}
}
return "/"
}
// isImmutableSystem detects if the system is likely an immutable system like Fedora Silverblue
// where the real root filesystem is mounted at /sysroot instead of /
func (a *Agent) isImmutableSystem() bool {
return a.getRootMountPoint() != "/"
}

9
agent/disk.go
View File

@@ -95,6 +95,9 @@ func (a *Agent) initializeDiskInfo() {
}
}
// Get the appropriate root mount point for this system
rootMountPoint := a.getRootMountPoint()
// Use FILESYSTEM env var to find root filesystem
if filesystem != "" {
for _, p := range partitions {
@@ -138,7 +141,7 @@ func (a *Agent) initializeDiskInfo() {
for _, p := range partitions {
// fmt.Println(p.Device, p.Mountpoint)
// Binary root fallback or docker root fallback
if !hasRoot && (p.Mountpoint == "/" || (p.Mountpoint == "/etc/hosts" && strings.HasPrefix(p.Device, "/dev"))) {
if !hasRoot && (p.Mountpoint == rootMountPoint || (p.Mountpoint == "/etc/hosts" && strings.HasPrefix(p.Device, "/dev"))) {
fs, match := findIoDevice(filepath.Base(p.Device), diskIoCounters, a.fsStats)
if match {
addFsStat(fs, p.Mountpoint, true)
@@ -174,8 +177,8 @@ func (a *Agent) initializeDiskInfo() {
// If no root filesystem set, use fallback
if !hasRoot {
rootDevice, _ := findIoDevice(filepath.Base(filesystem), diskIoCounters, a.fsStats)
slog.Info("Root disk", "mountpoint", "/", "io", rootDevice)
a.fsStats[rootDevice] = &system.FsStats{Root: true, Mountpoint: "/"}
slog.Info("Root disk", "mountpoint", rootMountPoint, "io", rootDevice)
a.fsStats[rootDevice] = &system.FsStats{Root: true, Mountpoint: rootMountPoint}
}
a.initializeDiskIoStats(diskIoCounters)