255 lines
6.4 KiB
Bash
Executable File
255 lines
6.4 KiB
Bash
Executable File
#!/bin/sh
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# shellcheck disable=SC1090
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# shellcheck disable=SC2154
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# CONF_FILE "_vms.conf" needs to have the following variables:
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## Server config for install-<mac>.conf
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#SERVER="server1"
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#DOMAIN="example.com"
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## IP / MAC config
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#IP_PREFIX="192.168.0"
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#IP_START=100
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#IPV6_PREFIX="fe1:dead:beef"
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#IPV6_START=1000
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#MAC_PREFIX="fe:1e:bb:4d:3c"
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## .conf locations
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#VMS="/root/vms"
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#ETC="/etc"
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#IMAGES="/var/vmm"
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#HTDOCS="/var/www/htdocs"
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## vm.conf
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#VMDUSERS="vmdusers"
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#UPLINK="uplink_vlan42"
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#BRIDGE="bridge42"
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## dhcpd.conf
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#ROUTER="192.168.0.1"
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#DNS="192.186.0.1"
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#SUBNET="192.168.0.1"
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#NETMASK="255.255.255.0"
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#RANGE="192.168.1.10 192.168.1.10"
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set -e
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main () {
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CONF_FILE="$PWD/_vms.conf"
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[ -f "$CONF_FILE" ] && . "$CONF_FILE"
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date=$(date "+%Y-%m-%d %H:%M:%S")
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echo "New config files created for $SERVER @ $date"
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fs=$(
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list_files "$VMS"
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)
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if test -n "$fs"
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then
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echo "$fs"
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echo "$fs" |
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render_vm_conf > "${ETC}/vm.conf"
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echo "$fs" |
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render_dhcpd_conf > "${ETC}/dhcpd.conf"
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echo "$fs" |
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render_install_conf
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echo "$fs" |
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create_images
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echo "$fs" |
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create_users
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fi
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}
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list_files() {
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# Find all the VM config files.
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# Takes the directory with vm*.txt files.
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find "$1" -type f -name "vm*.txt" -maxdepth 1 | sort | xargs grep -l "message"
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}
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find_vm() {
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# Find the number of the VM (VM#).
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# Takes the directory with vm*.txt files and instance name as variable.
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find "$1" -type f -name "vm*.txt" -maxdepth 1 | xargs grep -l "$2" | sed 's/^\.\/vm//;s/\.txt$//'
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}
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fetch_mac() {
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# Fetch the MAC address for the VM.
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# Takes the MAC_PREFIX and VM#.
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# print the MAC address
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echo "${1}:${2}"
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}
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fetch_ip() {
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# Fetch the IP address for the VM.
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# Takes the IP_PREFIX, IP_START and VM#.
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# add IP_START and VM# and print the IP address
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# print the IP address
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_prefix=$1
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_host=$(($2 + $3))
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echo "${_prefix}.${_host}"
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}
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fetch_ipv6() {
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# Fetch the IPv6 address of the VM.
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# Takes the IPV6_PREFIX, IPV6_START, IP_START and VM#
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# add IPV6_START and VM#, IP_START and VM# and print the IPv6 address
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# print the IPv6 address
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_prefix=$1
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_subnet=$(($2 + $4))
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_host=$(($3 + $4))
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echo "${_prefix}:${_subnet}::${_host}"
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}
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generate_passwd() {
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# Generate a random password for the install-<MAC>.conf file.
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# Doesn't take variables.
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tr -cd '[:print:]' < /dev/urandom | fold -w 20 | head -n 1
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}
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render_vm_conf() {
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# Generate vm.comf
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# Takes defaults from of _vms.conf and iterate over the vm*.txt files.
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# When the owner exists add "owner".
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# When the VM image doesn't exist add "boot".
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# fetch_mac() to get the correct MAC address of the VM.
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printf "#\\n# File generated on %s\\n#\\n" "$date"
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printf "socket owner :%s\\n\\n" "$VMDUSERS"
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printf "switch \"%s\" {\\n" "$UPLINK"
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printf "\\tinterface %s\\n" "$BRIDGE"
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printf "}\\n\\n"
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while read -r f
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do
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. "$f"
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printf "vm \"%s\" {\\n" "$instance"
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printf "\\tdisable\\n"
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if test -n "$owner"
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then
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printf "\\towner %s\\n" "$owner"
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fi
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if ! test -f "${IMAGES}/${instance}.img"
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then
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printf "\\tboot \"%s/bsd.rd\"\\n" "$IMAGES"
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fi
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printf "\\tdisk \"%s/%s.img\"\\n" "$IMAGES" "$instance"
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printf "\\tinterface tap {\\n"
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printf "\\t\\tswitch \"uplink_vlan921\"\\n"
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printf "\\t\\tlladdr %s\\n" "$(fetch_mac "$MAC_PREFIX" "$(find_vm "$VMS" "$instance")")"
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printf "\\t}\\n"
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printf "}\\n"
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done
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}
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render_dhcpd_conf() {
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# Generate dhcpd.comf
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# Takes defaults from of _vms.conf and iterate over the vm*.txt files.
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# When the VM image doesn't exist add "auto_install".
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# When the VM image does exist add "auto_upgrade".
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# fetch_mac() to get the correct MAC address of the VM.
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# fetch_ip() to get the correct IP address of the VM.
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printf "#\\n# File generated on %s\\n#\\n" "$date"
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printf "option domain-name \"%s\";\\n" "$DOMAIN"
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printf "option domain-name-servers \"%s\";\\n\\n" "$DNS"
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printf "subnet %s netmask %s {\\n" "$SUBNET" "$NETMASK"
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printf "\\toption routers %s;\\n" "$ROUTER"
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printf "\\tserver-name \"%s.%s\";\\n" "$SERVER" "$DOMAIN"
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printf "\\trange %s;\\n\\n" "$RANGE"
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while read -r f
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do
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. "$f"
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printf "\\thost %s {\\n" "$instance"
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printf "\\t\\thardware ethernet %s\\n" "$(fetch_mac "$MAC_PREFIX" "$(find_vm "$VMS" "$instance")")"
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printf "\\t\\tfixed-address %s\\n" "$(fetch_ip "$IP_PREFIX" "$IP_START" "$(find_vm "$VMS" "$instance")")"
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if ! test -f "${IMAGES}/${instance}.img"
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then
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printf "\\t\\tfilename \"auto_install\"\\n"
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else
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printf "\\t\\tfilename \"auto_upgrade\"\\n"
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fi
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printf "\\t\\toption host-name \"%s\"\\n" "$hostname"
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printf "\\t}\\n"
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done
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printf "}\\n"
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}
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render_install_conf() {
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# Generate install-<mac>.comf
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# Takes defaults from of _vms.conf and iterate over the vm*.txt files.
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# When the VM image doesn't exist create the install-<mac>.conf file.
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# When the VM image does exist remove the install-<mac>.conf file.
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# fetch_ipv6() to get the correct IPv6 address of the VM.
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# fetch_mac() to get the correct MAC address of the VM.
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while read -r f
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do
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. "$f"
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_pass="$(generate_passwd)"
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_ipv6=$(fetch_ipv6 "$IPV6_PREFIX" "$IPV6_START" "$IP_START" "$(find_vm "$VMS" "$instance")")
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_ipv6_gateway=$(echo "$_ipv6" | sed -e 's/::[0-9]*$/::1/g')
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_mac=$(fetch_mac "$MAC_PREFIX" "$(find_vm "$VMS" "$instance")")
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if ! test -f "${IMAGES}/${instance}.img"
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then
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cat <<-EOF > "${HTDOCS}/install-${_mac}.conf"
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#
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# File generated on $date
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#
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System hostname = $hostname
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Password for root = $_pass
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Which speed should com0 = 115200
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Network interfaces = vio0
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IPv4 address for vio0 = dhcp
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IPv6 address for vio0 = $_ipv6
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IPv6 default router = $_ipv6_gateway
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Setup a user = $username
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Password for user = $_pass
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Public ssh key for user = $message $_pass
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Which disk is the root disk = sd0
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What timezone are you in = Europe/Amsterdam
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Location of sets = http
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Server = ftp.nluug.nl
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Set name(s) = -x* +xb* +xf*
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EOF
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echo "Install file created: ${HTDOCS}/install-${_mac}.conf"
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else
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if test -f "${HTDOCS}/install-${_mac}.conf"
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then rm -rf "${HTDOCS}/install-${_mac}.conf"
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fi
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fi
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done
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}
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create_images() {
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while read -r f
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do
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. "$f"
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if ! test -f "${IMAGES}/${instance}.img"
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then vmctl create "${IMAGES}/${instance}.img" -s 50G > /dev/null
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echo "Image file created: ${IMAGES}/${instance}.img"
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fi
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done
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}
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create_users() {
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while read -r f
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do
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. "$f"
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if test -n "$owner"
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then
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if ! grep -e "^$owner" /etc/passwd > /dev/null
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then
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useradd -m -G "$VMDUSERS" "$owner"
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echo "$message" > "/home/${owner}/.ssh/authorized_keys"
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echo "User created: $owner"
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fi
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fi
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done
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}
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restart_service() {
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rcctl restart dhcpd
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vmctl reload
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}
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main "$@"
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