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alibaba-init.sh
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Authored By
ethomas
Jan 23 2018, 7:53 PM
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alibaba-init.sh
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#!/bin/vbash
### BEGIN INIT INFO
# Provides: os-conf
# Short-Description: The initial os-conf job, config the system.
### END INIT INFO
first_partition_dir='/live/image'
## The image must be prepared first with this custom directory in the root of the first partition
os_conf_dir=${first_partition_dir}/aliyun_custom_image
os_conf_file=${os_conf_dir}/os.conf
load_os_conf() {
if [[ -f $os_conf_file ]]; then
. $os_conf_file
return 0
else
return 1
fi
}
cleanup() {
## ensure $os_conf_file is deleted, to avoid repeating the configuration with each boot
rm $os_conf_file >& /dev/null
}
config_password() {
## Alibaba says it's setting the root password in their system creation dialog, but we're
## really setting the password into the vyos user. root should not have a password
## Also, you must use the password option in the setup, not the keyfile option
if [[ -n $password ]]; then
password=$(echo $password | base64 -d)
if [[ $? == 0 && -n $password ]]; then
/usr/bin/sg vyattacfg "/opt/vyatta/etc/config/scripts/vyos-command.sh \"system login user vyos authentication plaintext-password $password\""
fi
fi
}
config_hostname() {
if [[ -n $hostname ]]; then
/usr/bin/sg vyattacfg "/opt/vyatta/etc/config/scripts/vyos-command.sh \"system host-name $hostname\""
fi
}
config_dns() {
if [[ -n $dns_nameserver ]]; then
for i in $dns_nameserver; do
/usr/bin/sg vyattacfg "/opt/vyatta/etc/config/scripts/vyos-command.sh \"system name-server $i\""
done
fi
}
is_classic_network() {
## I have not tested this on a "Classic" setup, because new users can't setup Classic servers
# vpc: eth0
# classic: eth0 eth1
grep -q 'eth1' $os_conf_file
}
config_network() {
config_interface eth0 ${eth0_ip_addr} ${eth0_netmask} ${eth0_mac_addr}
## Don't know how to do this route on VyOS, but the VPC setup only needs the default gateway anyway
# config_route eth0 ${eth0_route}
config_default_gateway ${eth0_gateway}
if is_classic_network ; then
config_interface eth1 ${eth1_ip_addr} ${eth1_netmask} ${eth1_mac_addr}
# config_route eth1 ${eth1_route}
fi
}
config_interface() {
local interface=$1
local ip=$2
local netmask=$3
local cidr=$( mask2cidr $netmask )
local mac=$4
/usr/bin/sg vyattacfg "/opt/vyatta/etc/config/scripts/vyos-command.sh \"interfaces ethernet $interface address $ip/$cidr\""
/usr/bin/sg vyattacfg "/opt/vyatta/etc/config/scripts/vyos-command.sh \"interfaces ethernet $interface mac $mac\""
}
config_default_gateway() {
local gateway=$1
/usr/bin/sg vyattacfg "/opt/vyatta/etc/config/scripts/vyos-command.sh \"system gateway-address $gateway\""
}
## Don't know how to do the routes like this. Commenting out this subroutine and leaving it with their example
## Also not needed for the VPC setup. Only the default-gateway is needed
#config_route() {
# local interface=$1
# local route=$2
# route_conf=/etc/sysconfig/network-scripts/route-${interface}
# > $route_conf
# echo $route | sed 's/;/\n/' | \
# while read line; do
# dst=$(echo $line | awk '{print $1}')
# gw=$(echo $line | awk '{print $2}')
# if ! grep -q "$dst" $route_conf 2> /dev/null; then
# echo "$dst via $gw dev $interface" >> $route_conf
# fi
# if [[ "$dst" == "0.0.0.0/0" ]]; then
# config_default_gateway $gw
# fi
# done
#}
## VyOS needs the cidr for the interface setup, but Alibaba only provides the subnet mask.
## I found this subroutine for converting from netmask
mask2cidr () {
# Assumes there's no "255." after a non-255 byte in the mask
local x=${1##*255.}
set -- 0^^^128^192^224^240^248^252^254^ $(( (${#1} - ${#x})*2 )) ${x%%.*}
x=${1%%$3*}
echo $(( $2 + (${#x}/4) ))
}
## Do the stuff
if load_os_conf ; then
config_password
config_network
config_hostname
config_dns
cleanup
exit 0
else
echo "No os.conf file to load. This is okay."
exit 0
fi

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