modules

local

• shells
• block devices
• filesystems
• utilities

| Module | Description | Type | -------------------- | ---------------------------------------------------------------------------------- | | base | Base module with required utilities | library | bash | bash (bash is preferred interpreter if there more of them available) | shell | biosdevname | BIOS network device renaming | | btrfs | btrfs | filesystem | busybox | busybox | shell | caps | drop capabilities before init | | convertfs | Merges / into /usr on next boot | crypt | encrypted LUKS filesystems and cryptsetup | | crypt-gpg | GPG for crypto operations and SmartCards (may requires GPG keys) | | crypt-loop | encrypted loopback devices (symmetric key) | | dash | dash | shell | debug | debug features | | dm | device-mapper | library | dmraid | DMRAID arrays | | dmsquash-live | SquashFS images | | dmsquash-live-autooverlay |creates a partition for overlayfs usage in the free space on the root filesystem's parent block device| | dmsquash-live-ntfs | SquashFS images located in NTFS filesystems | | drm | kernel modules for DRM (complex graphics devices) | | ecryptfs | kernel module for ecryptfs (stacked cryptographic filesystem) | filesystem | fips | Enforces FIPS security standard regulations | | fs-lib | filesystem tools (including fsck.* and mount) | library | fstab-sys | Arranges for arbitrary partitions to be mounted before rootfs | | i18n | Includes keymaps, console fonts, etc. | | img-lib | Includes various tools for decompressing images | library | integrity | Extended Verification Module and ima-evm-utils | | kernel-modules | kernel modules for root filesystems and other boot-time devices | | kernel-modules-extra | extra out-of-tree kernel modules | | lvm | LVM devices | | lvmthinpool-monitor | Monitor LVM thinpool service | | masterkey | masterkey that can be used to decrypt other keys and keyutils | | mdraid | mdadm arrays | | mksh | mksh | shell | modsign | kernel module signing, keyutils | | multipath | multipath devices | | nvdimm | non-volatile DIMM devices | | overlayfs | kernel module for overlayfs| filesystem | ppcmac | thermal for PowerPC | | qemu | kernel modules to boot inside qemu | | lunmask | Masks LUN devices to select only ones which required to boot | | plymouth | boot splash via plymouth | | pollcdrom | CD-ROM polling | | rescue | utilities for rescue mode (such as ping, ssh, vi, fsck.*) | | resume | Allows initramfs to resume from low-power state | | rootfs-block | mount block device as rootfs | | securityfs | mount securityfs early | filesystem | selinux | selinux policy | | shutdown | Sets up hooks to run on shutdown | | syslog | Includes syslog capabilites | | terminfo | Includes a terminfo file | | udev-rules | Includes udev and some basic rules | | uefi-lib | Includes UEFI tools | | usrmount | | virtfs | virtual filesystems (9p) | filesystem | virtiofs | virtiofs | filesystem | warpclock | Sets kernel's timezone and reset the system time if adjtime is set to LOCAL | | watchdog | Includes watchdog devices management; works only if systemd not in use | | watchdog-modules | kernel modules for watchdog loaded early in booting |

network

• requires IP connectivity
• works with and without systemd

Module	Description
cifs	CIFS, cifs-utils
fcoe	Adds support for Fibre Channel over Ethernet (FCoE)
fcoe-uefi	Adds support for Fibre Channel over Ethernet (FCoE) in EFI mode
ifcfg	Includes /etc/sysconfig/network-scripts/* network scripts for network autogeneration
iscsi	Adds support for iSCSI devices
kernel-network-modules	Includes and loads kernel modules for network devices
livenet	Fetch live updates for SquashFS images
nbd	kernel module for Network Block Device, nbd
network	Virtual module for network service providers
network-legacy	Includes legacy networking tools support
nfs	kernel module for NFS, nfs-utils
nvmf	Adds support for NVMe over Fabrics devices
qemu-net	Includes network kernel modules for QEMU environment
ssh-client	Includes ssh and scp clients
url-lib	Includes curl and SSL certs

systemd

These modules would require including a version of systemd into initramfs.

Module	Description
bluetooth	Includes bluetooth devices support
dbus	Virtual module for dbus-broker or dbus-daemon
dbus-broker
dbus-daemon
dracut-systemd	Base systemd dracut module
fido2
lvmmerge	Merges lvm snapshots
memstrack	Includes memstrack for memory usage monitoring
pcsc	Adds support for PCSC Smart cards
pkcs11	Includes PKCS#11 libraries
rngd	Starts random generator serive on early boot
squash	Builds SquashFS initramfs
systemd	Adds systemd as early init initialization system
systemd-ac-power	systemd-ac-power
systemd-ask-password	systemd-ask-password
systemd-coredump	systemd-coredump
systemd-creds	systemd-creds
systemd-hostnamed	systemd-hostnamed
systemd-initrd	INITRD_INTERFACE
systemd-integritysetup	systemd-integritysetup
systemd-journald	systemd-journald
systemd-ldconfig
systemd-modules-load	systemd-modules-load
systemd-pcrphase	systemd-pcrphase
systemd-portabled	systemd-portabled
systemd-pstore	systemd-pstore
systemd-repart	systemd-repart
systemd-resolved	systemd-resolved
systemd-sysctl	systemd-sysctl
systemd-sysext	systemd-sysext
systemd-sysusers	systemd-sysusers
systemd-timedated	systemd-timedated
systemd-timesyncd	systemd-timesyncd
systemd-tmpfiles	systemd-tmpfiles
systemd-udevd	systemd-udevd
systemd-veritysetup	systemd-veritysetup
tpm2-tss	Adds support for TPM2 devices

systemd network

Module	Description
systemd-network-management	Adds network management for systemd
systemd-networkd
connman	connman
network-manager	NetworkManager

s390(x)

Module	Description
cio_ignore
cms	mount z/VM CMS disks on s390
dasd
dasd_mod
dasd_rules
dcssblk
qeth_rules
zfcp	networking
zfcp_rules
zipl
znet	networking

test

Module	Description
test
test-makeroot
test-root