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Add log levels to Minecraft backup script

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This commit is contained in:
Ryan Cavicchioni 2019-11-29 15:00:53 -06:00
parent a459473252
commit 3e5f948a00
Signed by: ryanc
GPG Key ID: 877EEDAF9245103D
1 changed files with 49 additions and 11 deletions
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60
roles/minecraft/files/minecraft-backup.sh
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@ -7,18 +7,50 @@ SCRATCH=$(mktemp -p /var/tmp -d minecraft.XXXXXXXXXX)
NICE=15
TAR=minecraft-$(date +%Y-%m-%d).tar
WAIT=30
VERBOSE=${VERBOSE:-4}
declare -A LOG_LEVELS
LOG_LEVELS=(
[emerg]=0
[alert]=1
[crit]=2
[err]=3
[warning]=4
[notice]=5
[info]=6
[debug]=7
)
log() {
local LEVEL
local TS
LEVEL=$1
TS="$(date -Is)"
shift
if [[ $VERBOSE -ge ${LOG_LEVELS[$LEVEL]} ]]; then
if [[ $# -ge 2 ]]; then
local FMT=$1
shift
printf "%s [%s] ${FMT}\n" "${TS}" "$LEVEL" "$@"
else
echo "${TS} [$LEVEL]" "$@"
fi
fi
}
finish() {
printf "Cleaning up ...\n"
log info "Cleaning up"
rm -rf "$SCRATCH"
if ! systemctl -q is-active "$SERVICE"; then
start_server
start_server $SERVICE
fi
}
trap finish EXIT
error_exit() {
printf "%s\n" "$1"
log crit "$1"
exit 1
}
@ -27,14 +59,14 @@ stop_server() {
local attempts="${2:-$WAIT}"
if ! systemctl -q is-active "$unit"; then
printf "%s is already stopped\n" "$unit"
log warning "%s is already stopped\n" "$unit"
return 0
fi
systemctl -q stop "$unit"
while systemctl -q is-active "$unit"; do
printf "Waiting for %s to stop ... (%s)\n" "$unit" "$attempts"
log warning "Waiting for %s to stop ... (%s)\n" "$unit" "$attempts"
((attempts--))
if ((attempts == 0)); then
return 1
@ -50,14 +82,14 @@ start_server() {
local attempts="${2:-$WAIT}"
if systemctl -q is-active "$unit"; then
printf "%s is already started\n" "$unit"
log warning "%s is already started\n" "$unit"
return 0
fi
systemctl -q start "$unit"
while ! systemctl -q is-active "$unit"; do
printf "Waiting for %s to start ... (%d)\n" "$unit" "$attempts"
log warning "Waiting for %s to start ... (%d)\n" "$unit" "$attempts"
((attempts--))
if ((attempts == 0)); then
return 1
@ -74,7 +106,7 @@ open_files() {
local attempts="${2:-$WAIT}"
while (($(lsof +D "$dir" | wc -l) > 0)); do
printf "Waiting for open files ... (%d)\n" "$attempts"
log warning "Waiting for open files ... (%d)\n" "$attempts"
((attempts--))
if ((attempts == 0)); then
return 1
@ -87,26 +119,32 @@ open_files() {
main() {
if ! stop_server; then
log info "Stopping %s service" $SERVICE
if ! stop_server $SERVICE; then
error_exit "Failed to stop $SERVICE"
fi
if ! open_files; then
log info "Checking for open files"
if ! open_files $VAR_DIR; then
error_exit "Open files exist in $VAR_DIR"
fi
log info "Starting backup"
if ! tar -cf "$SCRATCH/$TAR" -C "$VAR_DIR" world; then
error_exit "Archive failed"
fi
if ! start_server; then
log info "Starting %s service" $SERVICE
if ! start_server $SERVICE; then
error_exit "Failed to start $SERVICE"
fi
log info "Compressing $TAR"
if ! nice -n "$NICE" xz -9 "$SCRATCH/$TAR"; then
error_exit "Failed to compress $SCRATCH/$TAR"
else
mv "$SCRATCH/$TAR.xz" "$BACKUP_DIR"
log info "Symlinking current archive"
ln -nfs "$BACKUP_DIR/$TAR.xz" "$BACKUP_DIR/minecraft-latest.tar.xz"
fi
}