In the current state, services that depend on network need to
use dracut hooks, since nothing with pull in the network
targets into the transaction.
In the future, it would be nice to provide developers on systemd-only
systems the possibility to not use dracut hooks at all, but simply put
normal systemd services into the initrd.
Also, some modules even right now depend on systemd ordering, like
cryptsetup, so let's make sure, that the ordering inside systemd work
properly as well.
We can drastically improve boot times on some machines, or BM or VM
shapes, if we send DHCP requests in parallel on all interfaces
Add ip=single-dhcp as a kernel boot parameter, to send DHCP requests in
parallel on all interfaces. Thus, DHCP on each interface is overlapped
thereby reducing boot times for multiple interface machines.
This can help reduce the boot time by 1 minute per interface.
In addition, we may also save another 40 secs delay per interface, if
the link on which we try to send DHCP is in DOWN state. This can be
reduced by giving the following kernel command line parameter while
booting - rd.net.timeout.carrier=<timeout>.
Added manpage for ip=single-dhcp with the caveat that it does not
apply to Network Manager or SUSE wicked.
Signed-off-by: Anjali Kulkarni <anjali.k.kulkarni@oracle.com>
In this case we want to cover three cases
1) ip_address:ip_address
2) number:macaddress
3) :macaddress
We consider something an IPv6 address if it starts with number and
contains ":", but IPv6 addresses are in hexa.
This reverts commit c603419030.
wait_for_ipv6_dad_link is only called from dhclient script,
so the original intent "wait for IPv6 RA if using none/static IPv6 assignment"
does not seem to be correct.
Anyway, this brings an issue on isolated networks, where you don't
have any routes outside. dhclient-script hangs on this check
and after it times out, dhclient is able to set the address normally.
For the shell scripts, new environment variables were introduced.
dracutsysrootdir is the root directory, file existence checks use it.
DRACUT_LDCONFIG can override ldconfig with a different one that works
on the sysroot with foreign binaries.
DRACUT_LDD can override ldd with a different one that works
with foreign binaries.
DRACUT_TESTBIN can override /bin/sh. A cross-compiled sysroot
may use symlinks that are valid only when running on the target
so a real file must be provided that exist in the sysroot.
DRACUT_INSTALL now supports debugging dracut-install in itself
when run by dracut but without debugging the dracut scripts.
E.g. DRACUT_INSTALL="valgrind dracut-install or
DRACUT_INSTALL="dracut-install --debug".
DRACUT_COMPRESS_BZIP2, DRACUT_COMPRESS_LBZIP2, DRACUT_COMPRESS_LZMA,
DRACUT_COMPRESS_XZ, DRACUT_COMPRESS_GZIP, DRACUT_COMPRESS_PIGZ,
DRACUT_COMPRESS_LZOP, DRACUT_COMPRESS_ZSTD, DRACUT_COMPRESS_LZ4,
DRACUT_COMPRESS_CAT: All of the compression utilities may be
overridden, to support the native binaries in non-standard places.
DRACUT_ARCH overrides "uname -m".
SYSTEMD_VERSION overrides "systemd --version".
The dracut-install utility was overhauled to support sysroot via
a new option -r and fixes for clang-analyze. It supports
cross-compiler-ldd from
https://gist.github.com/jerome-pouiller/c403786c1394f53f44a3b61214489e6f
DRACUT_INSTALL_PATH was introduced so dracut-install can work with
a different PATH. In a cross-compiled environment (e.g. Yocto), PATH
points to natively built binaries that are not in the host's /bin,
/usr/bin, etc. dracut-install still needs plain /bin and /usr/bin
that are relative to the cross-compiled sysroot.
The hashmap pool allocate_tile/deallocate_tile code was removed
because clang-analyze showed errors in it. hashmap_copy was removed
because it wasn't used and clang-analyze showed errors in it.
DRACUT_INSTALL_LOG_TARGET and DRACUT_INSTALL_LOG_LEVEL were
introduced so dracut-install can use different settings from
DRACUT_LOG_TARGET and DRACUT_LOG_LEVEL.
Signed-off-by: Böszörményi Zoltán <zboszor@pr.hu>
Before we check if dad is done we should first make sure,
that there is a link local address where we do the check.
Due to this issue, on ipv6 only setups sometimes dhclient started
asking for ip address, before the link local address was present
and failed immediately.
busybox seems to not properly support this option,
and it can be be safely ommitted or replaced
with piping the output through head.
Rev 2:
* rebased on master
* addressed open points from review
commit 7347391 ('network-legacy: split off from network module')
splitted network function to network-legacy and removed check() function
of 40network. This caused 40network to be included even if network is
not needed.
Signed-off-by: Kairui Song <kasong@redhat.com>
If the network module obtained a lease using dhclient, NetworkManager
must be configured to use it too, otherwise it would obtain a different
lease (and could potentially break a connection to the network volume).
In kdump, if dump-target is ssh on ipv6, we need to sync until ipv6 addr
is ready. Currently ip=auto6/dhcp6 provides such function. But in 1st kernel,
it is hard to know whether the ipv6 addr is got by dhcpv6 or SLAAC.
E.g ifcfg-eth* contains DHCPV6C=yes direction, but there is no dhcpv6
server in the network, and then after the system is up, the user
echo 1 > /proc/sys/net/ipv6/conf/eth0/autoconf && accept_ra by manual
to obtain a ipv6 addr. Or vice.
So this patch suggests to make dhcpv6 as auto6 fallback
Signed-off-by: Pingfan Liu <piliu@redhat.com>
If no network related params are specific, but rd.neednet=1 is set,
the default initqueue action is to wait until one of the network
interfaces is marked as setup properly.
This also help with initqueue's race condition when the network interface
shows up late
References: bnc#866771
Signed-off-by: Hannes Reinecke <hare@suse.de>
Prior to this commit, the MTU setting was applied to a bond slave
interface. In older versions of the Linux kernel, this setting
propagated to the bond master and the other bond slaves associated with
the master. In recent versions of the kernel (observed in Linux 4.12),
increasing the MTU of a slave does not automatically increase the MTU of
the master. This allows for more flexibility but requires the MTU of
the master to be changed manually.
Ideally, the MTU setting should be applied to the bond master and the
setting will propagate to the bond slaves, since the slaves are required
to have a MTU that is greater than or equal to the bond master.
The dracut network module is only supposed to be used for wired interfaces
but if driver modules for wireless devices are wrongly copied, these will
be loaded and the available interfaces brought up.
If the rd.neednet=1 command line parameter is used, dhclient will attempt
to request an IP address for the interfaces and these requests will fail.
But other dracut modules that depend on the network to be settled, will
have to wait for the DHCP requests to timeout. Which can be a lot of time
since the dhclient default timeout value is 60 seconds.
Instead of trying to blacklist all possible kernel modules for wireless
devices, only bring up network interfaces if these are for wired devices.
Suggested-by: Harald Hoyer <harald@redhat.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
We tell dhclient to name 121 option "classless-routes",
but in dhclient-script we parse classless_static_routes.
So either have to change the configuration or the script.
And since dhclient uses by default classless_static_routes,
let's change the configuration
Previously our dhclient-script expected that $new_classless_static_routes
will have all values separated by a whitespace. But at least on F25
dhclient will put there the destination descriptor in the same format
as it is used by ISC dhcp-server.
For example:
new_classless_static_routes=32.10.198.122.47 192.168.78.4
while our current code expects
new_classless_static_routes=32 10 198 122 47 192 168 78 4
So let's just accept both of these formats by adding "." to IFS.
For details plesse see https://tools.ietf.org/html/rfc3442
"Classless Route Option Format"
removed copy&paste artifact "modify_routes add"
there is no modify_routes() function, and we simply want the output
of the parse function.
(cherry picked from commit 33710dfbfc)
Harald Hoyer