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|
#######################################################################
# Include: Declaration of core variables and some sanity checks #
#######################################################################
# wrapper for xmlstarlet to add node with attributes and value
# to the machine configuration
# Usage:
# add_node <parent> <newnode> <attrs...>
# E.g:
# add_node "/VirtualBox" "Machine" "uuid=1234"
add_node() {
if [ $# -lt 2 ]; then
writelog "${FUNCNAME[0]} requires 2 or more args, $# given."
return 1
fi
local PARENT="$1"
shift
if isempty PARENT; then
writelog "${FUNCNAME[0]} empty parent given!"
return 1
fi
local NODE="$1"
shift
if isempty NODE; then
writelog "${FUNCNAME[0]} empty node given!"
return 1
fi
# if parent does not exists, create it aswell
if ! node_exists "${PARENT}"; then
add_node "${PARENT%/*}" "${PARENT##*/}"
fi
# now go over the list of attributes and directly create
# the xmlstarlet syntax string: -t attr -n <key> -v <value>
local ATTRS_OPTS=
while [ $# -ne 0 ]; do
# expects key=value syntax
local key="${1%=*}"
local value="${1#*=}"
shift
if isempty key || isempty value; then
writelog "${FUNCNAME[0]} expecting key=value, got: $1"
cleanexit 1
fi
# the xmlstarlet internal newnode var references the newly created node
ATTRS_OPTS+=" -i \$newnode -t attr -n ${key} -v ${value}"
done
# args parsed, now create the node using xmlstarlet
# insert namespace to xpath expression
PARENT="$(print_namespaced "x" "${PARENT}")"
# create node and set the internal variable newnode to it
# to then add the attributes to it
local ret
xmlstarlet ed -L -N x="${VBOX_NAMESPACE}" \
-s "${PARENT}" -t elem -n "${NODE}" \
--var newnode '$prev' \
${ATTRS_OPTS} \
"${TMPCONFIG}"
ret=$?
if [ "$ret" -ne 0 ]; then
writelog "${FUNCNAME[0]} failed with '$ret' for args: $@"
fi
return $ret
}
# set_attr <node_xpath> <attr> <value>
set_attr() {
if [ $# -ne 3 ]; then
writelog "${FUNCNAME[0]} requires 3 args, $# given."
return 1
fi
if [ -z "$1" -o -z "$2" -o -z "$3" ]; then
writelog "${FUNCNAME[0]} empty arguments given: $@"
return 1
fi
if ! node_exists "$1"; then
add_node "${1%/*}" "${1##*/}" \
"$2=$3"
else
local ret
if ! attr_exists "$1" "$2"; then
xmlstarlet ed -L -N x="${VBOX_NAMESPACE}" \
-i "$(print_namespaced "x" "$1")" \
-t attr -n "$2" -v "$3" \
"${TMPCONFIG}"
ret=$?
else
xmlstarlet ed -L -N x="${VBOX_NAMESPACE}" \
-u "$(print_namespaced "x" "$1")/@$2" \
-v "$3" \
"${TMPCONFIG}"
ret=$?
fi
if [ "$ret" -ne 0 ]; then
writelog "${FUNCNAME[0]} failed with '$ret' for args: $@"
fi
return $ret
fi
}
# del_node <node_xpath>
del_node() {
if [ $# -ne 1 ]; then
writelog "${FUNCNAME[0]} requires one arg, $# given."
return 1
fi
if [ -z "$1" ]; then
writelog "${FUNCNAME[0]} empty xpath expression given."
return 1
fi
local ret
xmlstarlet ed -L -N x="${VBOX_NAMESPACE}" \
-d "$(print_namespaced "x" "$1")" \
"${TMPCONFIG}"
ret=$?
if [ "$ret" -ne 0 ]; then
writelog "${FUNCNAME[0]} failed with '$ret' for args: $@"
fi
return $ret
}
# attr_exists <node_xpath> <attr_name>
attr_exists() {
if [ $# -ne 2 ]; then
writelog "${FUNCNAME[0]} requires node and attribute as args, $# given."
return 1
fi
if [ -z "$1" -o -z "$2" ]; then
writelog "${FUNCNAME[0]} some arguments were empty: $@"
fi
xmlstarlet -q sel -N x="${VBOX_NAMESPACE}" \
-t -v "$(print_namespaced "x" "$1")/@$2" \
"${TMPCONFIG}"
ret=$?
if [ "$ret" -ne 0 ]; then
writelog "${FUNCNAME[0]} failed with '$ret' for args: $@"
fi
return $ret
}
# node_exists <node_xpath>
node_exists() {
if [ $# -ne 1 ]; then
writelog "${FUNCNAME[0]} requires one arg, $# given."
return 1
fi
if [ -z "$1" ]; then
writelog "${FUNCNAME[0]} empty xpath expression given."
return 1
fi
xmlstarlet -q sel -N x="${VBOX_NAMESPACE}" \
-t -c "$(print_namespaced "x" "$1")" \
"${TMPCONFIG}"
ret=$?
if [ "$ret" -ne 0 ]; then
writelog "${FUNCNAME[0]} failed with '$ret' for args: $@"
fi
return $ret
}
# adds the vbox namespace to an xpath expression using
# the given placeholder for it.
# e.g. print_namespaced "x" "/VirtualBox/Machine"
# would echo "/x:VirtualBox/x:Machine"
print_namespaced() {
if [ $# -ne 2 ]; then
writelog "${FUNCNAME[0]} expects 2 arguments, $# given."
cleanexit 1
fi
# add namespace on single '/' not doubles!
sed -E 's,(/)*/,\1/'"$1"':,g' <<< "$2"
}
gen_uuid() {
local UUID="$(cat /proc/sys/kernel/random/uuid)"
notempty UUID && echo $UUID && return 0
# fallback using $RANDOM
UUID=
while [ ${#UUID} -lt 32 ]; do
UUID="$UUID$RANDOM"
done
# sequence might be larger than 32, cut it and insert dashes
echo -n "${UUID:0:32}" | \
sed -E 's,(.{8})(.{4})(.{4})(.{4})(.{12}),\1-\2-\3-\4-\5,'
}
init_core() {
# check for variables that should have been set by the generic run-virt
if ! isset VM_CLEANNAME IMG_BASENAME SRC_IMG_ABSOLUTE VM_OS_TYPE; then
local MSG="Incomplete A required variable was not set by generic run-virt."
slxlog "virt-vbox-init" "${MSG}"
writelog "${MSG}"
error_user "Wichtige variablen, die das VBox Plugin benötigt, wurden nicht
gesetzt. Kann die VM nicht starten."
cleanexit 1
fi
# Check for vbox binaries in VBOX_BASE_DIR
for BIN in VBoxManage VirtualBox VBoxHeadless; do
if ! [ -x "${VBOX_BASE_DIR}/${BIN}" ]; then
local MSG="${BIN} not found in ${VBOX_BASE_DIR}."
writelog "${MSG}"
slxlog "virt-vbox-bin" "${MSG}"
cleanexit 1
fi
done
# check if the systemd vbox setup service ran successfully
if ! systemctl is-active vbox.service; then
local STATUSDUMP=$(mktemp)
systemctl status vbox.service > "$STATUSDUMP"
slxlog "virt-vbox-env" "vbox.service failed to start properly" "$STATUSDUMP"
EXIT_TYPE="internal" EXIT_REASON="VirtualBox wurde nicht richtig initialisiert!" cleanexit 1
fi
# validate that TMPCONFIG is actually an xml file
if ! xmlstarlet val "$TMPCONFIG"; then
slxlog "virt-vbox-noxml" "Downloaded machine description was not a valid xml." "$TMPCONFIG"
EXIT_TYPE="internal" EXIT_REASON="Die VM-Konfiguration ist keine valide VirtualBox-Datei!
Ihren Satelliten scheint VirtualBox nicht zu unterstützen." cleanexit 1
fi
# Define which features the VMware plugin supports
# Session specific dir for VM configs
declare -rg VBOX_ROOT="/tmp/virt/${PLUGIN_ID}/${USER}.$$"
declare -rg VBOX_MACHINES_DIR="${VBOX_ROOT}/Machines"
declare -rg VBOX_SNAPSHOT_DIR="${VBOX_MACHINES_DIR}/${VM_CLEANNAME}/Snapshots"
if ! mkdir -p "${VBOX_SNAPSHOT_DIR}"; then
writelog "Failed to create '${VBOX_SNAPSHOT_DIR}'."
cleanexit 1
fi
declare -rg VBOX_HDD_DIR="${VBOX_ROOT}/HardDisks"
if ! mkdir -p "${VBOX_HDD_DIR}"; then
writelog "Failed to create '${VBOX_HDD_DIR}'."
cleanexit 1
fi
# Virtualbox configuration dir instead of $HOME/.VirtualBox
export VBOX_USER_HOME="${VBOX_ROOT}"
# xml namespace for vbox configs
declare -rg VBOX_NAMESPACE="http://www.virtualbox.org/"
# path to the main machine configuration file
declare -rg VBOX_MACHINE_CONFIG="${VBOX_MACHINES_DIR}/${VM_CLEANNAME}/${VM_CLEANNAME}.xml"
writelog "Directories:"
writelog "\tConfig dir:\t\t$VBOX_ROOT"
writelog "\tMachines dir:\t\t$VBOX_MACHINES_DIR"
writelog "\tSnapshots dir:\t\t$VBOX_SNAPSHOT_DIR"
}
call_post_source init_core
|
