configure_global.cfg.sh

#!/bin/bash
# vim: ts=4:sw=4

. ~/plescripts/plelib.sh
. ~/plescripts/global.cfg
EXEC_CMD_ACTION=EXEC

typeset	-r	ME=$0
typeset	-r	PARAMS="$*"

typeset	-r	str_usage=\
"Usage : $ME ...."

typeset		db=undef

while [ $# -ne 0 ]
do
	case $1 in
		-emul)
			EXEC_CMD_ACTION=NOP
			shift
			;;

		-h|-help|help)
			info "$str_usage"
			LN
			exit 1
			;;

		*)
			error "Arg '$1' invalid."
			LN
			info "$str_usage"
			exit 1
			;;
	esac
done

typeset	-r	hostvm_type=linux_virtualbox

#	============================================================================

#	$1 nom de la variable à renseigner
#	$2 Message à afficher
function ask_for_variable
{
	typeset	-r	var_name=$1
	typeset		var_value=${!var_name}
	typeset	-r	msg=$2

	info "$msg"
	if [ x"$var_value" != x ]
	then
		str=$(escape_anti_slash "$var_value")
		info "Press <enter> to select : $(replace_paths_by_shell_vars $str)"
		info -n "Or new value : "
	else
		info -n "Value : "
	fi
	read -r keyboard

	[ x"$keyboard" != x ] && var_value="$keyboard" || true

	eval "$var_name=$(echo -E '$var_value')"
}

function read_gateway_ip
{
	typeset		outp=$(cat /etc/resolv.conf|grep -E "^nameserver")
	if [ $(wc -l<<<"$outp") -eq 1 ]
	then
		cut -d\  -f2<<<"$outp"
	else # Plus de 1 serveur, supprime l'IP de l'infra si elle est présente.
		outp=$(grep -vE "$infra_ip"<<<"$outp")
		if [ $(wc -l<<<"$outp") -eq 1 ]
		then
			cut -d\  -f2<<<"$outp"
		else # Plus de 1 serveur, l'utilisateur corrigera au besoins.
			echo $gateway	# Variable définie dans global.cfg
		fi
	fi
}

function VMs_folder
{
	if command_exists VBoxManage
	then
		if [ "$common_user_name" == "$USER" ]
		then # global.cfg a déjà été configuré.
			vm_p="$vm_path"
		else
			vm_p="$(VBoxManage list systemproperties	|\
						grep "Default machine folder:"	|\
						tr -s [:space:] | cut -d' ' -f4-)"
		fi

		ask_for_variable vm_p "VMs folder :"
		vm_p="${vm_p/\~/$HOME}"
		info -n "Exists $(replace_paths_by_shell_vars $vm_p) : "
		if [ ! -d "$vm_p" ]
		then
			vm_p="$vm_path"
			((++count_errors))
			info -f "[$KO]"
			LN
		else
			info -f "[$OK]"
			LN
		fi
	else
		error "VirtualBox not installed or VBoxManage not in PATH"
		((++count_errors))
		vm_p="No VMs folder"
		LN
	fi
}

function select_oracle_linux_release
{
	if [ -f "$iso_olinux_path/V975367-01.iso" ]
	then
		info "ISO Oracle Linux 7.5 [$OK]"
		LN
		OL7_LABEL_n=7.5
	elif [ -f "$iso_olinux_path/V921569-01.iso" ]
	then
		info "ISO Oracle Linux 7.4 [$OK]"
		LN
		OL7_LABEL_n=7.4
	elif [ -f "$iso_olinux_path/V834394-01.iso" ]
	then
		info "ISO Oracle Linux 7.3 [$OK]"
		LN
		OL7_LABEL_n=7.3
	elif [ -f "$iso_olinux_path/V100082-01.iso" ]
	then
		info "ISO Oracle Linux 7.2 [$OK]"
		LN
		OL7_LABEL_n=7.2
	else
		error "No Oracle Linux ISO fonud in '$iso_olinux_path'"
		LN
		((++count_errors))
	fi
}

function yum_repository
{
	# Il n'est pas possible de rester sur une ancienne release. Donc pour
	# utiliser une ancienne Release, utilisation du DVD comme repository.
	case $OL7_LABEL_n in
		7.2)
			ol7_repository_release=DVD_R2
			return 0
			;;
		7.3)
			ol7_repository_release=DVD_R3
			return 0
			;;
		7.4)
			ol7_repository_release=DVD_R4
			return 0
			;;
		7.5)
			typeset		do_update=yes
			ask_for_variable do_update "Update Oracle Linux $OL7_LABEL_n from Oracle repository ? yes no"
			LN

			if [ "$(to_lower $do_update)" == yes ]
			then
				ol7_repository_release=R5 # Les dépôts R4 et R5 sont fusionnés.
			else
				ol7_repository_release=DVD_R5
			fi
			return 0
			;;
	esac

	return 1
}

function configure_gateway
{
	gateway_new_ip=$(read_gateway_ip)
	ask_for_variable gateway_new_ip "Gateway IP (Box address) :"
	info -n "Ping $gateway_new_ip "
	if ping -c 1 $gateway_new_ip 1>/dev/null 2>&1
	then
		info -f "[$OK]"
		LN
	else
		((++count_errors))
		info -f "[$KO]"
		LN
	fi
}

function LUNs_storage
{
	disks_stored_on=$disks_hosted_by
	info "On a computer with low power (less than 128Gb of RAM and 16 cores) choose vbox."
	ask_for_variable disks_stored_on "Disks managed by san or vbox (vbox = VirtualBox) :"
	LN
	disks_stored_on=$(to_lower $disks_stored_on)
	case "$disks_stored_on" in
		vbox|san)
			;;
		*)
			((++count_errors))
			error "Value $disks_stored_on invalid."
			LN
			;;
	esac

	if [ "$common_user_name" != "$USER" ]
	then # global.cfg n'a jamais été configuré.
		san_disk_n=vdi
	elif [ -b $san_disk ]
	then
		san_disk_n=$san_disk
	else
		san_disk_n=vdi
	fi

	if [ $disks_stored_on == san ]
	then
		ask_for_variable san_disk_n	\
			"Use virtual disk (enter vdi) or physical disk (enter full device name) : "
		LN
	fi

	if [ "$san_disk_n" != "vdi" ]
	then
		info -n "Device $san_disk_n exists : "
		if [ ! -b "$san_disk_n" ]
		then
			((++count_errors))
			info -f "[$KO]"
			LN
		else
			info -f "[$OK]"
			LN
			warning "All data on $san_disk_n will be lost !"
			confirm_or_exit "Continue"
			LN

			typeset	-r	device_group=$(ls -l "$san_disk_n" | cut -d\  -f4)
			info "$san_disk_n in group : $device_group"
			info -n "$USER member of group : $device_group "
			if id | grep -q $device_group
			then
				info -f "[$OK]"
				LN
			else
				info -f "[$KO] add $USER to group $device_group"
				exec_cmd sudo usermod -a -G $device_group $USER
				LN
				error "Disconnect & connect user $USER"
				((++count_errors))
				LN
			fi

		fi
	fi
}

function network_interface
{
	info "Network interfaces"
	exec_cmd "ip link show | grep -vE \"(lo|vboxnet)\" | grep \"state UP\""
	LN
	if_net_bridgeadapter_n=$(printf "%s" $(ip link show | grep -vE "(lo|vboxnet)" | grep "state UP" | head -1 | cut -d: -f2))
	ask_for_variable if_net_bridgeadapter_n "Network interface to used for internet access."
	LN
}

function sync_time_source
{
	master_time_server_n=$(hostname -s)
	info "Sync time source for VMs."
	info "if $master_time_server_n do not have ntp server, choose internet."
	ask_for_variable master_time_server_n "Default $master_time_server_n, enter internet for internet."
	LN

	case "$master_time_server_n" in
		$(hostname -s)|internet)
			;; # OK
		*)
			error "Source '$master_time_server_n' invalid, change to $(hostname -s)"
			LN
			master_time_server_n=$(hostname -s)
			;;
	esac
}

# update file $HOME/plescripts/local.cfg if $1 != $2
# $1 orignal value
# $2 new value
# $3 parameter name to write to local cfg
function update_local_cfg
{
	if [[ "$1" != "$2" && x"$2" != x ]]
	then
		update_variable "$3" "$2" $HOME/plescripts/local.cfg
	fi
}

typeset	-i	count_errors=0

exec_cmd "touch $HOME/plescripts/local.cfg"
LN

VMs_folder

select_oracle_linux_release

yum_repository

configure_gateway

LUNs_storage

network_interface

sync_time_source

if [ ! -d $HOME/plescripts/tmp ]
then
	info "Create temporary directory."
	exec_cmd "mkdir $HOME/plescripts/tmp"
	LN
fi

line_separator
update_local_cfg "$gateway" "$gateway_new_ip" GATEWAY

update_local_cfg "$hostvm" "$hostvm_type" HOSTVM

update_local_cfg "$client_hostname" "$(hostname -s)" CLIENT_HOSTNAME

update_local_cfg "$common_user_name" "$USER" COMMON_USER_NAME

update_local_cfg "$common_uid" "$UID" COMMON_UID

update_local_cfg "$if_net_bridgeadapter" "$if_net_bridgeadapter_n" IF_NET_BRIDGEADAPTER

if [ "$vm_p" != "No VMs folder" ]
then
	# Le premier paramètre permet de forcer la mise à jour de la variable.
	update_local_cfg "forcer_maj" "\"$vm_p\"" "VM_PATH"
fi

update_local_cfg "$master_time_server" "$master_time_server_n" MASTER_TIME_SERVER

update_local_cfg "disks_hosted_by" "$disks_stored_on" "DISKS_HOSTED_BY"
update_local_cfg "san_disk" "$san_disk_n" "SAN_DISK"

update_local_cfg "OL7_LABEL" "$OL7_LABEL_n" OL7_LABEL

info "Configure repository OL7"
case $ol7_repository_release in
	R5) # Utilise le dépôt 'latest' avec le noyau de la release voulue.
		# C'est le même dépôt pour la R4 et R5, donc je pense que la R6 sera
		# automatiquement installé, s'il existe un jour.
		update_local_cfg "INFRA_YUM_REPOSITORY_RELEASE" "$ol7_repository_release"
		update_local_cfg "ORCL_YUM_REPOSITORY_RELEASE" "$ol7_repository_release"
		;;
	DVD*)	# Utilisation du DVD.
		update_local_cfg "INFRA_YUM_REPOSITORY_RELEASE" "$ol7_repository_release"
		update_local_cfg "ORCL_YUM_REPOSITORY_RELEASE" "$ol7_repository_release"
		;;
	*)
		error "Repository '$ol7_repository_release' invalid."
		LN
		exit 1
		;;
esac

if [ $count_errors -ne 0 ]
then
	error "$count_errors errors."
	error "Correct all errors and rerun this script."
	LN
	exit 1
fi

exit 0