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gh-44: Improved host and domain name handling

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Issue OpenNebula/addon-context-linux#44
pull/64/head
Vlastimil Holer 8 years ago committed by Vlastimil Holer
parent d1168e5cc4
commit 748b9a8d16
No known key found for this signature in database
GPG Key ID: EB549BADEFD07C53
4 changed files with 208 additions and 68 deletions
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112
base.one/etc/one-context.d/15-hostname
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@ -0,0 +1,112 @@
#!/bin/bash
function set_hostname() {
hostname=$1
if [ -d /run/systemd/system/ ]; then
hostnamectl set-hostname --static "${hostname}"
else
if [ -f /etc/sysconfig/network ]; then
sed -i '/^HOSTNAME=.*$/d' /etc/sysconfig/network
echo "HOSTNAME=${hostname}" >>/etc/sysconfig/network
else
echo "${hostname}" >/etc/hostname
fi
hostname "${hostname}"
fi
}
function set_domainname() {
domain=$1
sed -i '/^domain .*/d' /etc/resolv.conf
echo "domain ${domain}" >>/etc/resolv.conf
}
function get_first_ip() {
hostname -I | cut -d' ' -f1
}
function get_dns_name() {
text=$(LC_ALL=C host "$1" 2>/dev/null)
[ $? = 0 ] || exit 0
[[ $text == *"has no PTR record" ]] && exit 0
name=$(echo "$text" | awk '/(has address|name pointer)/ {print $(NF)}' | sed 's/\.$//')
echo $name
}
function update_hosts() {
ip=$1
name=$2
hostname=$3
if [ "x${hostname}" = "x${name}" ]; then
hosts="${name}"
else
hosts="${name} ${hostname}"
fi
note='# one-contextd'
entry="${ip}\t${hosts}\t\t${note}"
# update our old entry
if grep -qi "${note}" /etc/hosts; then
sed -i -e "s/^.*${note}\$/${entry}/" /etc/hosts
# update entry with same IP (but not localhost)
elif grep -E "^${ip}\s" /etc/hosts | grep -qv localhost; then
sed -i -e "/localhost/! s/^${ip}\s.*\$/${entry}/" /etc/hosts
# update entry with same name
elif grep -qE "\s${name}(\s|#|\$)" /etc/hosts; then
sed -i -re "s/^.*\s${name}([ #\t].*|$)/${entry}/" /etc/hosts
# create new entry
elif [ -f /etc/hosts ]; then
sed -i -e "1s/^/${entry}\n/" /etc/hosts
else
echo -e "${entry}" >>/etc/hosts
fi
}
#####
first_ip=$(get_first_ip)
if [ -n "$SET_HOSTNAME" ]; then
name=$(echo "$SET_HOSTNAME" | \
sed -e 's/[^-a-zA-Z0-9\.]/-/g' -e 's/^-*//g' -e 's/-*$//g')
elif [ -n "$DNS_HOSTNAME" ]; then
name=$(get_dns_name "${first_ip}")
fi
if [ -n "${name}" ]; then
# split host and domain names
hostname=${name%%.*}
domain=${name#*.}
if [ "x${domain}" = "x${hostname}" ]; then
domain=''
fi
set_hostname "${hostname}"
if [ -n "${domain}" ]; then
set_domainname "${domain}"
fi
if [ -n "${DNS_HOSTNAME}" ]; then
host_ip=$first_ip
else
# If selected hostname resolves on first IP,
# use first IP for local hostname in /etc/hosts.
# Otherwise use loopback IP.
name_ip=$(get_dns_name "${name}")
if [ "x${first_ip}" = "x${name_ip}" ]; then
host_ip=$first_ip
elif [ -f /etc/debian_version ]; then
host_ip='127.0.1.1'
else
host_ip='127.0.0.1'
fi
fi
if [ -n "${host_ip}" ]; then
update_hosts "${host_ip}" "${name}" "${hostname}"
fi
fi

106
base_arch/etc/one-context.d/15-hostname
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@ -1,26 +1,112 @@
#!/bin/bash
CONFIG_FILE="/etc/hostname"
function set_hostname() {
NAME=$1
hostname=$1
if [ -d /run/systemd/system/ ]; then
hostnamectl set-hostname --static "${hostname}"
else
if [ -f /etc/sysconfig/network ]; then
sed -i '/^HOSTNAME=.*$/d' /etc/sysconfig/network
echo "HOSTNAME=${hostname}" >>/etc/sysconfig/network
else
echo "${hostname}" >/etc/hostname
fi
[ -n "$NAME" ] || exit 0
hostname "${hostname}"
fi
}
function set_domainname() {
domain=$1
sed -i '/^domain .*/d' /etc/resolv.conf
echo "domain ${domain}" >>/etc/resolv.conf
}
hostnamectl set-hostname $NAME
function get_first_ip() {
hostname -I | cut -d' ' -f1
}
function get_dns_name() {
first_ip=$(hostname -I | cut -d' ' -f1)
text=$(host $first_ip)
text=$(LC_ALL=C host "$1" 2>/dev/null)
[ $? = 0 ] || exit 0
[[ $text == *"has no PTR record" ]] && exit 0
name=$(echo "$text" | awk '{print $(NF)}' | sed 's/\.$//')
name=$(echo "$text" | awk '/(has address|name pointer)/ {print $(NF)}' | sed 's/\.$//')
echo $name
}
function update_hosts() {
ip=$1
name=$2
hostname=$3
if [ "x${hostname}" = "x${name}" ]; then
hosts="${name}"
else
hosts="${name} ${hostname}"
fi
note='# one-contextd'
entry="${ip}\t${hosts}\t\t${note}"
# update our old entry
if grep -qi "${note}" /etc/hosts; then
sed -i -e "s/^.*${note}\$/${entry}/" /etc/hosts
# update entry with same IP (but not localhost)
elif grep -E "^${ip}\s" /etc/hosts | grep -qv localhost; then
sed -i -e "/localhost/! s/^${ip}\s.*\$/${entry}/" /etc/hosts
# update entry with same name
elif grep -qE "\s${name}(\s|#|\$)" /etc/hosts; then
sed -i -re "s/^.*\s${name}([ #\t].*|$)/${entry}/" /etc/hosts
# create new entry
elif [ -f /etc/hosts ]; then
sed -i -e "1s/^/${entry}\n/" /etc/hosts
else
echo -e "${entry}" >>/etc/hosts
fi
}
#####
first_ip=$(get_first_ip)
if [ -n "$SET_HOSTNAME" ]; then
set_hostname $(echo "$SET_HOSTNAME" | sed -e 's/[^-a-zA-Z0-9]/-/g' -e 's/^-*//g' -e 's/-*$//g')
name=$(echo "$SET_HOSTNAME" | \
sed -e 's/[^-a-zA-Z0-9\.]/-/g' -e 's/^-*//g' -e 's/-*$//g')
elif [ -n "$DNS_HOSTNAME" ]; then
set_hostname $(get_dns_name)
name=$(get_dns_name "${first_ip}")
fi
if [ -n "${name}" ]; then
# split host and domain names
hostname=${name%%.*}
domain=${name#*.}
if [ "x${domain}" = "x${hostname}" ]; then
domain=''
fi
set_hostname "${hostname}"
if [ -n "${domain}" ]; then
set_domainname "${domain}"
fi
if [ -n "${DNS_HOSTNAME}" ]; then
host_ip=$first_ip
else
# If selected hostname resolves on first IP,
# use first IP for local hostname in /etc/hosts.
# Otherwise use loopback IP.
name_ip=$(get_dns_name "${name}")
if [ "x${first_ip}" = "x${name_ip}" ]; then
host_ip=$first_ip
elif [ -f /etc/debian_version ]; then
host_ip='127.0.1.1'
else
host_ip='127.0.0.1'
fi
fi
if [ -n "${host_ip}" ]; then
update_hosts "${host_ip}" "${name}" "${hostname}"
fi
fi

28
base_deb.one/etc/one-context.d/15-hostname
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@ -1,28 +0,0 @@
#!/bin/bash
CONFIG_FILE="/etc/hostname"
function set_hostname() {
NAME=$1
[ -n "$NAME" ] || exit 0
echo $NAME > $CONFIG_FILE
hostname $NAME
}
function get_dns_name() {
first_ip=$(hostname -I | cut -d' ' -f1)
text=$(host $first_ip)
[ $? = 0 ] || exit 0
[[ $text == *"has no PTR record" ]] && exit 0
name=$(echo "$text" | awk '{print $(NF)}' | sed 's/\.$//')
echo $name
}
if [ -n "$SET_HOSTNAME" ]; then
set_hostname $(echo "$SET_HOSTNAME" | sed -e 's/[^-a-zA-Z0-9]/-/g' -e 's/^-*//g' -e 's/-*$//g')
elif [ -n "$DNS_HOSTNAME" ]; then
set_hostname $(get_dns_name)
fi

30
base_rpm.one/etc/one-context.d/15-hostname
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@ -1,30 +0,0 @@
#!/bin/bash
CONFIG_FILE="/etc/sysconfig/network"
function set_hostname() {
NAME=$1
[ -n "$NAME" ] || exit 0
sed -i '/^HOSTNAME=.*$/d' $CONFIG_FILE
echo "HOSTNAME=$NAME" >> $CONFIG_FILE
[[ $(awk -F= '/^VERSION_ID/ {gsub("\"","");print $2}' /etc/os-release) -ge 7 ]] && echo $NAME > /etc/hostname
hostname $NAME
}
function get_dns_name() {
first_ip=$(hostname -I | cut -d' ' -f1)
text=$(host $first_ip)
[ $? = 0 ] || exit 0
[[ $text == *"has no PTR record" ]] && exit 0
name=$(echo "$text" | awk '{print $(NF)}' | sed 's/\.$//')
echo $name
}
if [ -n "$SET_HOSTNAME" ]; then
set_hostname $(echo "$SET_HOSTNAME" | sed -e 's/[^-a-zA-Z0-9]/-/g' -e 's/^-*//g' -e 's/-*$//g')
elif [ -n "$DNS_HOSTNAME" ]; then
set_hostname $(get_dns_name)
fi
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