ctdb/config/ctdbd_wrapper

   1 #!/bin/sh
   2
   3 # ctdbd wrapper - start or stop CTDB
   4
   5 usage ()
   6 {
   7     echo "usage: ctdbd_wrapper { start | stop }"
   8     exit 1
   9 }
  10
  11 [ $# -eq 1 ] || usage
  12
  13 action="$1"
  14
  15 ############################################################
  16
  17 if [ -z "$CTDB_BASE" ] ; then
  18     export CTDB_BASE="/usr/local/etc/ctdb"
  19 fi
  20
  21 . "${CTDB_BASE}/functions"
  22 loadconfig "ctdb"
  23
  24 ctdbd="${CTDBD:-/usr/local/sbin/ctdbd}"
  25
  26 ############################################################
  27
  28 # If necessary, mount volatile database directory on tmpfs
  29 dbdir_tmpfs_start ()
  30 {
  31     if [ -z "$CTDB_DBDIR_TMPFS_OPTIONS" ] ; then
  32         return
  33     fi
  34
  35     # Shortcut for readability
  36     _opts="$CTDB_DBDIR_TMPFS_OPTIONS"
  37
  38     mkdir -p "$CTDB_DBDIR" || exit $?
  39
  40     # If already mounted then remount, otherwise mount
  41     if findmnt -t tmpfs "$CTDB_DBDIR" >/dev/null ; then
  42         mount -t tmpfs -o "remount,$_opts" none "$CTDB_DBDIR" || \
  43             exit $?
  44     else
  45         mount -t tmpfs -o "$_opts" none "$CTDB_DBDIR" || exit $?
  46     fi
  47 }
  48
  49 # If necessary, unmount volatile database tmpfs directory on exit
  50 dbdir_tmpfs_stop ()
  51 {
  52     if [ -z "$CTDB_DBDIR_TMPFS_OPTIONS" ] ; then
  53         return
  54     fi
  55
  56     if [ -d "$CTDB_DBDIR" ] && findmnt -t tmpfs "$CTDB_DBDIR" >/dev/null ; then
  57         umount "$CTDB_DBDIR"
  58     fi
  59 }
  60
  61 # Only the nested function references its arguments
  62 # shellcheck disable=SC2120
  63 build_ctdb_options ()
  64 {
  65     ctdb_options=""
  66
  67     maybe_set ()
  68     {
  69         # If the given variable isn't set then do nothing
  70         [ -n "$2" ] || return
  71         # If a required value for the variable and it doesn't match,
  72         # then do nothing
  73         [ -z "$3" -o "$3" = "$2" ] || return
  74
  75         val="'$2'"
  76         case "$1" in
  77             --*) sep="=" ;;
  78             -*)  sep=" " ;;
  79         esac
  80         # For these options we're only passing a value-less flag.
  81         if [ -n "$3" ] ; then
  82             val=""
  83             sep=""
  84         fi
  85
  86         ctdb_options="${ctdb_options}${ctdb_options:+ }${1}${sep}${val}"
  87     }
  88
  89     if [ -z "$CTDB_RECOVERY_LOCK" ] ; then
  90         echo "No recovery lock specified. Starting CTDB without split brain prevention."
  91     fi
  92     maybe_set "--reclock"                "$CTDB_RECOVERY_LOCK"
  93
  94     # build up ctdb_options variable from optional parameters
  95     maybe_set "--logging"                "$CTDB_LOGGING"
  96     maybe_set "--listen"                 "$CTDB_NODE_ADDRESS"
  97     maybe_set "--dbdir"                  "$CTDB_DBDIR"
  98     maybe_set "--dbdir-persistent"       "$CTDB_DBDIR_PERSISTENT"
  99     maybe_set "--dbdir-state"            "$CTDB_DBDIR_STATE"
 100     maybe_set "--transport"              "$CTDB_TRANSPORT"
 101     maybe_set "-d"                       "$CTDB_DEBUGLEVEL"
 102     maybe_set "--notification-script"    "$CTDB_NOTIFY_SCRIPT"
 103     maybe_set "--start-as-disabled"      "$CTDB_START_AS_DISABLED"    "yes"
 104     maybe_set "--start-as-stopped "      "$CTDB_START_AS_STOPPED"     "yes"
 105     maybe_set "--no-recmaster"           "$CTDB_CAPABILITY_RECMASTER" "no"
 106     maybe_set "--no-lmaster"             "$CTDB_CAPABILITY_LMASTER"   "no"
 107     maybe_set "--nosetsched"             "$CTDB_NOSETSCHED"           "yes"
 108     maybe_set "--script-log-level"       "$CTDB_SCRIPT_LOG_LEVEL"
 109     maybe_set "--max-persistent-check-errors" "$CTDB_MAX_PERSISTENT_CHECK_ERRORS"
 110 }
 111
 112 export_debug_variables ()
 113 {
 114     [ -n "$CTDB_DEBUG_HUNG_SCRIPT" ] && export CTDB_DEBUG_HUNG_SCRIPT
 115     [ -n "$CTDB_DEBUG_LOCKS" ] && export CTDB_DEBUG_LOCKS
 116 }
 117
 118 ############################################################
 119
 120 start()
 121 {
 122     dbdir_tmpfs_start
 123
 124     # build_ctdb_options() takes no arguments
 125     # shellcheck disable=SC2119
 126     build_ctdb_options
 127
 128     export_debug_variables
 129
 130     # Explicitly trying to disable core files, no other way
 131     # shellcheck disable=SC2039
 132     if [ "$CTDB_SUPPRESS_COREFILE" = "yes" ]; then
 133         ulimit -c 0
 134     else
 135         ulimit -c unlimited
 136     fi
 137
 138     # Unsupported option easily avoided by not using configuration variable
 139     # shellcheck disable=SC2039
 140     if [ -n "$CTDB_MAX_OPEN_FILES" ]; then
 141         ulimit -n "$CTDB_MAX_OPEN_FILES"
 142     fi
 143
 144     if [ -n "$CTDB_VALGRIND" -a "$CTDB_VALGRIND" != "no" ] ; then
 145         if [ "$CTDB_VALGRIND" = "yes" ] ; then
 146             ctdbd="valgrind -q --log-file=/usr/local/var/log/ctdb_valgrind ${ctdbd}"
 147         else
 148             ctdbd="${CTDB_VALGRIND} ${ctdbd}"
 149         fi
 150         ctdb_options="${ctdb_options} --valgrinding"
 151     fi
 152
 153     case "$CTDB_LOGGING" in
 154         syslog:udp|syslog:udp-rfc5424)
 155             logger -t ctdbd "CTDB is being run with ${CTDB_LOGGING}.  If nothing is logged then check your syslogd configuration"
 156             ;;
 157         syslog|syslog:*) : ;;
 158         file:*)
 159             logger -t ctdbd "CTDB is being run without syslog enabled.  Logs will be in ${CTDB_LOGGING#file:}"
 160             ;;
 161         *)
 162             logger -t ctdbd "CTDB is being run without syslog enabled.  Logs will be in log.ctdb"
 163     esac
 164
 165     eval "$ctdbd" "$ctdb_options" || return 1
 166
 167     # Wait until ctdbd has started and is ready to respond to clients.
 168     _timeout="${CTDB_STARTUP_TIMEOUT:-10}"
 169     _count=0
 170     while [ "$_count" -lt "$_timeout" ] ; do
 171         if $CTDB runstate first_recovery startup running >/dev/null 2>&1 ; then
 172             return 0
 173         fi
 174
 175         _count=$((_count + 1))
 176         sleep 1
 177     done
 178
 179     echo "Timed out waiting for initialisation - check logs"
 180     # Attempt a shutdown just in case things are still running
 181     $CTDB shutdown >/dev/null 2>&1
 182     drop_all_public_ips >/dev/null 2>&1
 183     return 1
 184 }
 185
 186 stop()
 187 {
 188         $CTDB shutdown
 189
 190         # The above command is important and needs to stand out, so
 191         # post-check exit status
 192         # shellcheck disable=SC2181
 193         if [ $? -ne 0 ] ; then
 194                 echo "Error while shutting down CTDB"
 195                 drop_all_public_ips >/dev/null 2>&1
 196                 return 1
 197         fi
 198
 199         dbdir_tmpfs_stop
 200
 201         return 0
 202 }
 203
 204 ############################################################
 205
 206 # Allow notifications for start/stop.
 207 if [ -x "$CTDB_BASE/rc.ctdb" ] ; then
 208     "$CTDB_BASE/rc.ctdb" "$action"
 209 fi
 210
 211 case "$action" in
 212     start) start ;;
 213     stop)  stop  ;;
 214     *)
 215         echo "usage: $0 {start|stop}"
 216         exit 1
 217 esac