[__hostame] Simplify and revert hostnamectl to be a last resort
This commit is contained in:
Dennis Camera
parent
b65ceba569
commit
6eec5f87a4
3 changed files with 90 additions and 127 deletions
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@ -1,66 +0,0 @@
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#!/bin/sh
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#
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# 2019 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
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#
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# This file is part of cdist.
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#
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# cdist is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# cdist is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with cdist. If not, see <http://www.gnu.org/licenses/>.
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#
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#
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# Retrieve the persistent hostname
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#
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# Firstly, check hostnamectl if available.
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if command -v hostnamectl >/dev/null 2>&1
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then
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hostnamectl status --static && exit 0
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fi
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# In case hostnamectl is missing or failed:
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# Fall back to alternative OS-specific approaches.
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case $("$__explorer/os")
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in
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alpine|archlinux|coreos|debian|devuan|ubuntu)
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test -f /etc/hostname && cat /etc/hostname
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;;
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centos|fedora|redhat|scientific)
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test -f /etc/sysconfig/network \
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&& (. /etc/sysconfig/network && echo "$HOSTNAME")
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;;
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freebsd)
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(. /etc/rc.conf && echo "$hostname")
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;;
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gentoo)
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(. /etc/conf.d/hostname && echo "$hostname")
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;;
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macosx)
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scutil --get HostName 2>/dev/null
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;;
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netbsd)
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if grep -q '^hostname=' /etc/rc.conf
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then
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(. /etc/rc.conf && echo "$hostname")
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elif [ -f /etc/myname ]
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then
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# Fall back to /etc/myname file
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cat /etc/myname
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fi
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;;
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openbsd)
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cat /etc/myname
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;;
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suse)
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cat /etc/HOSTNAME 2>/dev/null
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;;
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esac
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@ -22,17 +22,17 @@
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os=$(cat "$__global/explorer/os")
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name_running=$(cat "$__global/explorer/hostname")
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name_config=$(cat "$__object/explorer/persistent_hostname")
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has_hostnamectl=$(cat "$__object/explorer/has_hostnamectl")
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if [ -f "$__object/parameter/name" ]; then
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name_should="$(cat "$__object/parameter/name")"
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if test -s "$__object/parameter/name"
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then
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name_should=$(cat "$__object/parameter/name")
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else
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case $os
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in
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# RedHat-derivatives and BSDs
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centos|fedora|redhat|scientific|freebsd|netbsd|openbsd)
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centos|fedora|redhat|scientific|freebsd|macosx|netbsd|openbsd)
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# Hostname is FQDN
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name_should="${__target_host}"
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;;
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@ -43,66 +43,49 @@ else
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esac
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fi
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################################################################################
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# Check if the hostname is already correct
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# Check if the (running) hostname is already correct
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#
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if [ "$name_running" = "$name_should" ] \
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&& [ -z "$name_config" -o "$name_config" = "$name_should" ]
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then
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exit 0
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fi
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test "$name_running" != "$name_should" || exit 0
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################################################################################
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# Setup hostname
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#
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echo 'changed' >>"$__messages_out"
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# First try to set the hostname using hostnamectl, if available.
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if [ -n "$has_hostnamectl" ]; then
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# Allow hostnamectl to fail silently.
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# Who the fuck invented a tool that needs dbus to set the hostname anyway…
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# NOTE: We write the static hostname to /etc/hostname first in case
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# hostnamectl fails. Fallback-code below will then adjust the running
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# hostname below.
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echo "echo '$name_should' >/etc/hostname"
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echo "hostnamectl set-hostname '$name_should' && exit 0"
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fi
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# Use the good old way to set the hostname. Also if hostnamectl fails.
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# Use the good old way to set the hostname.
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case $os
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in
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alpine|archlinux|debian|devuan|ubuntu)
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echo "echo '$name_should' >/etc/hostname"
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echo "hostname -F /etc/hostname"
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alpine|debian|devuan|ubuntu)
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echo 'hostname -F /etc/hostname'
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;;
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coreos|openbmc-phosphor)
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# NOTE: systemd-only distros have the hostname already written above.
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# But since hostamectl failed, we update the running hostname
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# manually.
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echo "hostname -F /etc/hostname"
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;;
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gentoo)
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# NOTE: Writing the hostname to file is done in the manifest for OpenRC.
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# For systemd hostnamectl should take care of that.
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archlinux|centos|fedora|redhat|scientific|freebsd|netbsd|gentoo)
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echo "hostname '$name_should'"
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;;
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macosx)
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echo "scutil --set HostName '$name_should'"
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;;
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openbsd)
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echo 'hostname -F /etc/myname'
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;;
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suse)
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# We write into /etc/HOSTNAME for backwards-compatibility. Modern SuSE
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# has hostnamectl anyway and symlinks /etc/HOSTNAME to /etc/hostname.
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echo "echo '$name_should' >/etc/HOSTNAME"
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echo 'hostname -F /etc/HOSTNAME'
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;;
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centos|fedora|freebsd|netbsd|openbsd|redhat|scientific)
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# NOTE: Writing the hostname to file is done in the manifest.
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echo "hostname '$name_should'"
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;;
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*)
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echo "echo 'Unsupported OS: $os' >&2; exit 1"
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# Fall back to set the hostname using hostnamectl, if available.
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if test -n "$has_hostnamectl"
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then
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# Don't use hostnamectl as the primary means to set the hostname for
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# systemd systems, because it cannot be trusted to work reliably and
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# exit with non-zero when it fails.
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# Who invented a tool that needs dbus to set the hostname anyway…
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echo "hostnamectl set-hostname \"\$(cat /etc/hostname)\""
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echo "test \"\$(hostname)\" = \"\$(cat /etc/hostname)\" || hostname -F /etc/hostname"
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else
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printf "echo 'Unsupported OS: %s' >&2\nexit 1\n" "$os"
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fi
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;;
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esac
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@ -20,18 +20,25 @@
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# along with cdist. If not, see <http://www.gnu.org/licenses/>.
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#
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onchange_cmd="echo changed >>'$__messages_out'"
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not_supported() {
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echo "Your operating system ($os) is currently not supported by this type (${__type##*/})." >&2
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echo "Please contribute an implementation for it if you can." >&2
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exit 1
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echo "Your operating system ($os) is currently not supported by this type (${__type##*/})." >&2
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echo "Please contribute an implementation for it if you can." >&2
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exit 1
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}
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set_hostname_systemd() {
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echo "$1" | __file /etc/hostname --source - --onchange "$onchange_cmd"
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}
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os=$(cat "$__global/explorer/os")
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max_len=$(cat "$__object/explorer/max_len")
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has_hostnamectl=$(cat "$__object/explorer/has_hostnamectl")
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if [ -f "$__object/parameter/name" ]; then
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name_should="$(cat "$__object/parameter/name")"
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if test -s "$__object/parameter/name"
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then
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name_should=$(cat "$__object/parameter/name")
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else
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case $os
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in
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@ -49,18 +56,37 @@ fi
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if test -n "${max_len}" -a "$(printf '%s' "${name_should}" | wc -c)" -gt "${max_len}"
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then
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printf "Host name too long. Up to %u characters allowed.\n" "${max_len}" >&2
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exit 1
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printf "Host name too long. Up to %u characters allowed.\n" "${max_len}" >&2
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exit 1
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fi
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case $os
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in
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archlinux|debian|suse|ubuntu|devuan|coreos|alpine|macosx)
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alpine|debian|devuan|ubuntu)
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echo "$name_should" \
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| __file /etc/hostname --source - --onchange "$onchange_cmd"
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;;
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macosx)
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# handled in gencode-remote
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:
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;;
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archlinux)
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if test -n "$has_hostnamectl"
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then
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set_hostname_systemd "$name_should"
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else
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# Only for ancient ArchLinux, write to /etc/rc.conf on pre-systemd
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# versions.
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__key_value sysconfig-hostname \
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--file /etc/rc.conf \
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--delimiter '=' --exact_delimiter \
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--key 'HOSTNAME' \
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--value "\"$name_should\"" \
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--onchange "$onchange_cmd"
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fi
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;;
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centos|fedora|redhat|scientific)
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if test -z "$(cat "$__object/explorer/has_hostnamectl")"
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if test -z "$has_hostnamectl"
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then
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# Only write to /etc/sysconfig/network on non-systemd versions.
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# On systemd-based versions this entry is ignored.
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--file /etc/sysconfig/network \
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--delimiter '=' --exact_delimiter \
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--key HOSTNAME \
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--value "\"$name_should\""
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--value "\"$name_should\"" \
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--onchange "$onchange_cmd"
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else
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set_hostname_systemd "$name_should"
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fi
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;;
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gentoo)
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if test -z "$(cat "$__object/explorer/has_hostnamectl")"
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if test -z "$has_hostnamectl"
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then
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# Only write to /etc/conf.d/hostname on OpenRC-based installations.
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# On systemd use hostnamectl(1) in gencode-remote.
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--delimiter '=' --exact_delimiter \
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--key 'hostname' \
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--value "\"$name_should\""
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else
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set_hostname_systemd "$name_should"
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fi
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;;
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freebsd)
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@ -88,22 +119,37 @@ in
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--file /etc/rc.conf \
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--delimiter '=' --exact_delimiter \
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--key 'hostname' \
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--value "\"$name_should\""
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--value "\"$name_should\"" \
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--onchange "$onchange_cmd"
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;;
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netbsd)
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__key_value rcconf-hostname \
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--file /etc/rc.conf \
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--delimiter '=' --exact_delimiter \
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--key 'hostname' \
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--value "\"$name_should\""
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--value "\"$name_should\"" \
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--onchange "$onchange_cmd"
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# To avoid confusion, ensure that the hostname is only stored once
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__file /etc/myname --state absent
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;;
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openbsd)
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echo "$name_should" | __file /etc/myname --source -
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echo "$name_should" \
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| __file /etc/myname --source - --onchange "$onchange_cmd"
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;;
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suse)
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# We write into /etc/HOSTNAME for backwards-compatibility. Modern SuSE
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# has hostnamectl anyway and symlinks /etc/HOSTNAME to /etc/hostname.
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echo "$name_should" \
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| __file /etc/HOSTNAME --source - --onchange "$onchange_cmd"
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;;
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*)
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# On other operating systems we fall back to hostnamectl if available…
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test -n "$(cat "$__object/explorer/has_hostnamectl")" || not_supported
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# On other operating systems we fall back to systemd's hostnamectl if available…
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if test -n "$has_hostnamectl"
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then
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set_hostname_systemd "$name_should"
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else
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not_supported
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fi
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;;
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esac
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