[__hostame] Simplify and revert hostnamectl to be a last resort

This commit is contained in:
Dennis Camera 2019-10-26 17:11:35 +02:00
parent b65ceba569
commit 6eec5f87a4
3 changed files with 90 additions and 127 deletions

View file

@ -1,66 +0,0 @@
#!/bin/sh
#
# 2019 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
#
# This file is part of cdist.
#
# cdist is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# cdist is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with cdist. If not, see <http://www.gnu.org/licenses/>.
#
#
# Retrieve the persistent hostname
#
# Firstly, check hostnamectl if available.
if command -v hostnamectl >/dev/null 2>&1
then
hostnamectl status --static && exit 0
fi
# In case hostnamectl is missing or failed:
# Fall back to alternative OS-specific approaches.
case $("$__explorer/os")
in
alpine|archlinux|coreos|debian|devuan|ubuntu)
test -f /etc/hostname && cat /etc/hostname
;;
centos|fedora|redhat|scientific)
test -f /etc/sysconfig/network \
&& (. /etc/sysconfig/network && echo "$HOSTNAME")
;;
freebsd)
(. /etc/rc.conf && echo "$hostname")
;;
gentoo)
(. /etc/conf.d/hostname && echo "$hostname")
;;
macosx)
scutil --get HostName 2>/dev/null
;;
netbsd)
if grep -q '^hostname=' /etc/rc.conf
then
(. /etc/rc.conf && echo "$hostname")
elif [ -f /etc/myname ]
then
# Fall back to /etc/myname file
cat /etc/myname
fi
;;
openbsd)
cat /etc/myname
;;
suse)
cat /etc/HOSTNAME 2>/dev/null
;;
esac

View file

@ -22,17 +22,17 @@
os=$(cat "$__global/explorer/os")
name_running=$(cat "$__global/explorer/hostname")
name_config=$(cat "$__object/explorer/persistent_hostname")
has_hostnamectl=$(cat "$__object/explorer/has_hostnamectl")
if [ -f "$__object/parameter/name" ]; then
name_should="$(cat "$__object/parameter/name")"
if test -s "$__object/parameter/name"
then
name_should=$(cat "$__object/parameter/name")
else
case $os
in
# RedHat-derivatives and BSDs
centos|fedora|redhat|scientific|freebsd|netbsd|openbsd)
centos|fedora|redhat|scientific|freebsd|macosx|netbsd|openbsd)
# Hostname is FQDN
name_should="${__target_host}"
;;
@ -43,66 +43,49 @@ else
esac
fi
################################################################################
# Check if the hostname is already correct
# Check if the (running) hostname is already correct
#
if [ "$name_running" = "$name_should" ] \
&& [ -z "$name_config" -o "$name_config" = "$name_should" ]
then
exit 0
fi
test "$name_running" != "$name_should" || exit 0
################################################################################
# Setup hostname
#
echo 'changed' >>"$__messages_out"
# First try to set the hostname using hostnamectl, if available.
if [ -n "$has_hostnamectl" ]; then
# Allow hostnamectl to fail silently.
# Who the fuck invented a tool that needs dbus to set the hostname anyway…
# NOTE: We write the static hostname to /etc/hostname first in case
# hostnamectl fails. Fallback-code below will then adjust the running
# hostname below.
echo "echo '$name_should' >/etc/hostname"
echo "hostnamectl set-hostname '$name_should' && exit 0"
fi
# Use the good old way to set the hostname. Also if hostnamectl fails.
# Use the good old way to set the hostname.
case $os
in
alpine|archlinux|debian|devuan|ubuntu)
echo "echo '$name_should' >/etc/hostname"
echo "hostname -F /etc/hostname"
alpine|debian|devuan|ubuntu)
echo 'hostname -F /etc/hostname'
;;
coreos|openbmc-phosphor)
# NOTE: systemd-only distros have the hostname already written above.
# But since hostamectl failed, we update the running hostname
# manually.
echo "hostname -F /etc/hostname"
;;
gentoo)
# NOTE: Writing the hostname to file is done in the manifest for OpenRC.
# For systemd hostnamectl should take care of that.
archlinux|centos|fedora|redhat|scientific|freebsd|netbsd|gentoo)
echo "hostname '$name_should'"
;;
macosx)
echo "scutil --set HostName '$name_should'"
;;
openbsd)
echo 'hostname -F /etc/myname'
;;
suse)
# We write into /etc/HOSTNAME for backwards-compatibility. Modern SuSE
# has hostnamectl anyway and symlinks /etc/HOSTNAME to /etc/hostname.
echo "echo '$name_should' >/etc/HOSTNAME"
echo 'hostname -F /etc/HOSTNAME'
;;
centos|fedora|freebsd|netbsd|openbsd|redhat|scientific)
# NOTE: Writing the hostname to file is done in the manifest.
echo "hostname '$name_should'"
;;
*)
echo "echo 'Unsupported OS: $os' >&2; exit 1"
# Fall back to set the hostname using hostnamectl, if available.
if test -n "$has_hostnamectl"
then
# Don't use hostnamectl as the primary means to set the hostname for
# systemd systems, because it cannot be trusted to work reliably and
# exit with non-zero when it fails.
# Who invented a tool that needs dbus to set the hostname anyway…
echo "hostnamectl set-hostname \"\$(cat /etc/hostname)\""
echo "test \"\$(hostname)\" = \"\$(cat /etc/hostname)\" || hostname -F /etc/hostname"
else
printf "echo 'Unsupported OS: %s' >&2\nexit 1\n" "$os"
fi
;;
esac

View file

@ -20,18 +20,25 @@
# along with cdist. If not, see <http://www.gnu.org/licenses/>.
#
onchange_cmd="echo changed >>'$__messages_out'"
not_supported() {
echo "Your operating system ($os) is currently not supported by this type (${__type##*/})." >&2
echo "Please contribute an implementation for it if you can." >&2
exit 1
echo "Your operating system ($os) is currently not supported by this type (${__type##*/})." >&2
echo "Please contribute an implementation for it if you can." >&2
exit 1
}
set_hostname_systemd() {
echo "$1" | __file /etc/hostname --source - --onchange "$onchange_cmd"
}
os=$(cat "$__global/explorer/os")
max_len=$(cat "$__object/explorer/max_len")
has_hostnamectl=$(cat "$__object/explorer/has_hostnamectl")
if [ -f "$__object/parameter/name" ]; then
name_should="$(cat "$__object/parameter/name")"
if test -s "$__object/parameter/name"
then
name_should=$(cat "$__object/parameter/name")
else
case $os
in
@ -49,18 +56,37 @@ fi
if test -n "${max_len}" -a "$(printf '%s' "${name_should}" | wc -c)" -gt "${max_len}"
then
printf "Host name too long. Up to %u characters allowed.\n" "${max_len}" >&2
exit 1
printf "Host name too long. Up to %u characters allowed.\n" "${max_len}" >&2
exit 1
fi
case $os
in
archlinux|debian|suse|ubuntu|devuan|coreos|alpine|macosx)
alpine|debian|devuan|ubuntu)
echo "$name_should" \
| __file /etc/hostname --source - --onchange "$onchange_cmd"
;;
macosx)
# handled in gencode-remote
:
;;
archlinux)
if test -n "$has_hostnamectl"
then
set_hostname_systemd "$name_should"
else
# Only for ancient ArchLinux, write to /etc/rc.conf on pre-systemd
# versions.
__key_value sysconfig-hostname \
--file /etc/rc.conf \
--delimiter '=' --exact_delimiter \
--key 'HOSTNAME' \
--value "\"$name_should\"" \
--onchange "$onchange_cmd"
fi
;;
centos|fedora|redhat|scientific)
if test -z "$(cat "$__object/explorer/has_hostnamectl")"
if test -z "$has_hostnamectl"
then
# Only write to /etc/sysconfig/network on non-systemd versions.
# On systemd-based versions this entry is ignored.
@ -68,11 +94,14 @@ in
--file /etc/sysconfig/network \
--delimiter '=' --exact_delimiter \
--key HOSTNAME \
--value "\"$name_should\""
--value "\"$name_should\"" \
--onchange "$onchange_cmd"
else
set_hostname_systemd "$name_should"
fi
;;
gentoo)
if test -z "$(cat "$__object/explorer/has_hostnamectl")"
if test -z "$has_hostnamectl"
then
# Only write to /etc/conf.d/hostname on OpenRC-based installations.
# On systemd use hostnamectl(1) in gencode-remote.
@ -81,6 +110,8 @@ in
--delimiter '=' --exact_delimiter \
--key 'hostname' \
--value "\"$name_should\""
else
set_hostname_systemd "$name_should"
fi
;;
freebsd)
@ -88,22 +119,37 @@ in
--file /etc/rc.conf \
--delimiter '=' --exact_delimiter \
--key 'hostname' \
--value "\"$name_should\""
--value "\"$name_should\"" \
--onchange "$onchange_cmd"
;;
netbsd)
__key_value rcconf-hostname \
--file /etc/rc.conf \
--delimiter '=' --exact_delimiter \
--key 'hostname' \
--value "\"$name_should\""
--value "\"$name_should\"" \
--onchange "$onchange_cmd"
# To avoid confusion, ensure that the hostname is only stored once
__file /etc/myname --state absent
;;
openbsd)
echo "$name_should" | __file /etc/myname --source -
echo "$name_should" \
| __file /etc/myname --source - --onchange "$onchange_cmd"
;;
suse)
# We write into /etc/HOSTNAME for backwards-compatibility. Modern SuSE
# has hostnamectl anyway and symlinks /etc/HOSTNAME to /etc/hostname.
echo "$name_should" \
| __file /etc/HOSTNAME --source - --onchange "$onchange_cmd"
;;
*)
# On other operating systems we fall back to hostnamectl if available…
test -n "$(cat "$__object/explorer/has_hostnamectl")" || not_supported
# On other operating systems we fall back to systemd's hostnamectl if available…
if test -n "$has_hostnamectl"
then
set_hostname_systemd "$name_should"
else
not_supported
fi
;;
esac