Initramfs init: Difference between revisions
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== initramfs init cmdline options (work in progress) == | |||
In addition to the [https://www.kernel.org/doc/html/v4.14/admin-guide/kernel-parameters.html kernel boot parameters] are a number of parameters that the init script understands. | |||
Although you may specify your own init script when building an initramfs, these parameters allow for extensive control over the initial startup of an Alpine Linux system. | |||
<code>quiet</code> : less verbose init script execution | |||
<code>debug_init</code> : sets '-x' in the init script and -d for mdev | |||
<code>chart</code> : Enables bootchartd for measuring system startup speed. | |||
<code>ip=dhcp</code> : use DHCP for network configuration. | <code>ip=dhcp</code> : use DHCP for network configuration. | ||
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* <code>dns2</code> address of the 2nd DNS server | * <code>dns2</code> address of the 2nd DNS server | ||
<code> | <code>modloop=URL</code> : the remote location of the image containing kernel's modules, required for LVM and raid setup. | ||
: | :The remote location of the <code>modloop</code> image is the same as the kernel and initramfs (see below). | ||
<code>blacklist=MODULE{,MODULE}</code> : This comma-separated list names kernel modules that modprobe will reject to load. | |||
<code> | <code>alpine_repo=URL</code> : the location of the Alpine repository from which packages are downloaded. | ||
: | :For stable release, use <code>http://dl-cdn.alpinelinux.org/alpine/v3.9/main</code> | ||
<code> | :For rolling release, use <code>http://dl-cdn.alpinelinux.org/alpine/edge/main</code> | ||
<code>ssh_key=URL</code> : the remote location of your SSH public key. It will be added to root's authorized_keys. Also triggers OpenSSH-server to be installed and started. | |||
<code>apkovl=URL</code> : Unpack the APK Overlay file from this URL. Happens immediately after network is up . This option will set the default for service install and setup to false. (see .default_boot_services). | |||
(work in progress) | |||
* init= | |||
* init_args= | |||
* dasd= | * dasd= | ||
* s390x_net= | * s390x_net= | ||
Line 53: | Line 60: | ||
* resume | * resume | ||
* rootflags | * rootflags | ||
* usbdelay | * usbdelay | ||
* pkgs= | * pkgs= | ||
Line 60: | Line 65: | ||
* keep_apk_new | * keep_apk_new | ||
* splash= | * splash= | ||
* | * ... | ||
[[category:Kernel]] |
Revision as of 07:39, 14 September 2019
This material is work-in-progress ... Do not follow instructions here until this notice is removed. |
initramfs init cmdline options (work in progress)
In addition to the kernel boot parameters are a number of parameters that the init script understands.
Although you may specify your own init script when building an initramfs, these parameters allow for extensive control over the initial startup of an Alpine Linux system.
quiet
: less verbose init script execution
debug_init
: sets '-x' in the init script and -d for mdev
chart
: Enables bootchartd for measuring system startup speed.
ip=dhcp
: use DHCP for network configuration.
ip=client-ip:server-ip:gw-ip:netmask:hostname:device:autoconf:dns1:dns2
: use static IP configuration, each field is separated by a colon :
client-ip
ip address of the guest VM where we are going to run the installerserver-ip
not used, leave blank or fill withnone
gw-ip
the gateway ip addressnetmask
the netmaskhostname
not used, leave blank or fill withnone
device
the network interface of the guest VM, default iseth0
if left blankautoconf
not used, leave blank or fill withnone
oroff
dns1
address of the DNS serverdns2
address of the 2nd DNS server
modloop=URL
: the remote location of the image containing kernel's modules, required for LVM and raid setup.
- The remote location of the
modloop
image is the same as the kernel and initramfs (see below).
blacklist=MODULE{,MODULE}
: This comma-separated list names kernel modules that modprobe will reject to load.
alpine_repo=URL
: the location of the Alpine repository from which packages are downloaded.
- For stable release, use
http://dl-cdn.alpinelinux.org/alpine/v3.9/main
- For rolling release, use
http://dl-cdn.alpinelinux.org/alpine/edge/main
ssh_key=URL
: the remote location of your SSH public key. It will be added to root's authorized_keys. Also triggers OpenSSH-server to be installed and started.
apkovl=URL
: Unpack the APK Overlay file from this URL. Happens immediately after network is up . This option will set the default for service install and setup to false. (see .default_boot_services).
(work in progress)
- init=
- init_args=
- dasd=
- s390x_net=
- rootfstype=
- modules=
- crytptroot=
- cryptdm=
- cryptheader=
- cryptoffset=
- cryptokey=
- nbd=
- root=
- resume
- rootflags
- usbdelay
- pkgs=
- ssh_key=
- keep_apk_new
- splash=
- ...