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#!/bin/bash
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#
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# Copyright (C) 2009, 2010, 2011, 2012 Google Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA.
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set -e -u
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@SHELL_ENV_INIT@
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# Overridden by unittest
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: ${CHECK_CERT_EXPIRED:=$PKGLIBDIR/check-cert-expired}
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usage() {
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    echo "Usage: $0 node|master" 2>&1
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    exit $1
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}
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if [[ "$#" -ne 1 ]]; then
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  usage 1
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fi
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case "$1" in
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  node)
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    readonly CLEANER_LOG_DIR=$LOG_DIR/cleaner
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    ;;
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  master)
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    readonly CLEANER_LOG_DIR=$LOG_DIR/master-cleaner
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    ;;
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  --help-completion)
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    echo "choices=node,master 1 1"
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    exit 0
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    ;;
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  --help)
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    usage 0
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    ;;
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  *)
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    usage 1
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    ;;
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esac
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readonly CRYPTO_DIR=$RUN_DIR/crypto
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readonly QUEUE_ARCHIVE_DIR=$DATA_DIR/queue/archive
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in_cluster() {
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  [[ -e $DATA_DIR/ssconf_master_node ]]
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}
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cleanup_node() {
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  # Return if directory for crypto keys doesn't exist
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  [[ -d $CRYPTO_DIR ]] || return 0
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  find $CRYPTO_DIR -mindepth 1 -maxdepth 1 -type d | \
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  while read dir; do
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    if $CHECK_CERT_EXPIRED $dir/cert; then
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      rm -vf $dir/{cert,key}
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      rmdir -v --ignore-fail-on-non-empty $dir
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    fi
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  done
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}
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cleanup_watcher() {
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  # Return if machine is not part of a cluster
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  in_cluster || return 0
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  # Remove old watcher files
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  find $DATA_DIR -maxdepth 1 -type f -mtime +$REMOVE_AFTER \
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    \( -name 'watcher.*-*-*-*.data' -or \
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       -name 'watcher.*-*-*-*.instance-status' \) -print0 | \
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  xargs -r0 rm -vf
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}
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cleanup_master() {
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  # Return if machine is not part of a cluster
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  in_cluster || return 0
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  # Return if queue archive directory doesn't exist
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  [[ -d $QUEUE_ARCHIVE_DIR ]] || return 0
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  # Remove old jobs
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  find $QUEUE_ARCHIVE_DIR -mindepth 2 -type f -mtime +$REMOVE_AFTER -print0 | \
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  xargs -r0 rm -vf
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}
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# Define how many days archived jobs should be left alone
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REMOVE_AFTER=21
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# Define how many log files to keep around (usually one per day)
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KEEP_LOGS=50
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# Log file for this run
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LOG_FILE=$CLEANER_LOG_DIR/cleaner-$(date +'%Y-%m-%dT%H_%M').$$.log
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# Create log directory
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mkdir -p $CLEANER_LOG_DIR
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# Redirect all output to log file
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exec >>$LOG_FILE 2>&1
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echo "Cleaner started at $(date)"
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# Remove old cleaner log files
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find $CLEANER_LOG_DIR -maxdepth 1 -type f | sort | head -n -$KEEP_LOGS | \
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xargs -r rm -vf
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case "$1" in
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  node)
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    cleanup_node
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    cleanup_watcher
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    ;;
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  master)
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    cleanup_master
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    ;;
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esac
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exit 0