Révision 28 trunk/shell/generate-hosts-file

generate-hosts-file (revision 28)
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#! /bin/bash
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#
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# Generate a /etc/hosts files that will be use
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# by dnsmasq on the front end.
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#
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# ST - 2012-05-15
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#
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# Create and start the front end.
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#
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# Get the directory of the script.
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SCRIPT_PATH=`dirname $0`
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# Get the script name.
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SCRIPT_NAME=`basename $0`
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# Source the common configuration variables.
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. $SCRIPT_PATH/c-i-a-b.common
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# Clean up the file
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HOSTS_FILE="${SCRIPT_PATH}/${TEMPLATES_DIR}/etc/${HOSTS_FILE_BASENAME}"
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rm -f $HOSTS_FILE
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# Local host static entry
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echo 127.0.0.1 localhost >> $HOSTS_FILE
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# Compute the file entries for the compute nodes.
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for i in `seq 1 $COMPUTE_NODE_MAX_NUM`
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  do
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    NODE_NUMBER=$i
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    NODE_NUMBER_STRING=$NODE_NUMBER
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    # Normalize the node numbers for the node names on 3 characters.
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    while [ ${#NODE_NUMBER_STRING} -lt 3 ]
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      do
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        NODE_NUMBER_STRING="0$NODE_NUMBER_STRING"
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    done
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    COMPUTE_NODE_NAME="${COMPUTE_NODE_NAME_PREFIX}${NODE_NUMBER_STRING}"
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    echo -n "${COMPUTE_NODE_STATIC_NETWORK_PREFIX}.${NODE_NUMBER} " >> $HOSTS_FILE
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    echo -n "${COMPUTE_NODE_NAME}.$CLUSTER_DOMAIN_NAME " >> $HOSTS_FILE
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    echo "${COMPUTE_NODE_NAME}" >> $HOSTS_FILE
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#
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# Output file stuff: we write all the output to file descriptor #5
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# If no argument is given to the script descriptor #5 is redirected to
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# STDOUT (descriptor #1)
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# If an argument is given, output is rediected to the file having
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# the name of the argument.
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#
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if [ "x$1" == "x" ] ; then
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  exec 5>&1
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else
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  exec 5> $1
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fi
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# Localhost stuff.
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echo "127.0.0.1 localhost" 1>&5
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# Compute nodes stuff.
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CNCSNP=1
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for CNCSNP in `seq 1 $CONST_COMPUTE_NODE_MAX_NUM`  ; do
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  echo -n "${CLUSTER_STATIC_NETWORK_PREFIX}.${CNCSNP} " 1>&5
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  CNCSNP_STRING=$CNCSNP
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  while [ ${#CNCSNP_STRING} -lt 3 ] ; do
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    CNCSNP_STRING=0$CNCSNP_STRING
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  done
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  echo -n "${COMPUTE_NODE_NAME_PREFIX}${CNCSNP_STRING}.${CLUSTER_DOMAIN_NAME} " 1>&5
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  echo "${COMPUTE_NODE_NAME_PREFIX}${CNCSNP_STRING}" 1>&5
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done
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# More static entries
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echo -n "${COMPUTE_NODE_STATIC_NETWORK_PREFIX}.$FRONT_END_STATIC_NETWORK_POSTFIX " >> $HOSTS_FILE
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echo -n "$FRONT_END_NAME.$CLUSTER_DOMAIN_NAME " >> $HOSTS_FILE
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echo  $FRONT_END_NAME >> $HOSTS_FILE
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echo -n "${COMPUTE_NODE_STATIC_NETWORK_PREFIX}.$COMPUTE_NODE_MODEL_STATIC_NETWORK_POSTFIX " >> $HOSTS_FILE
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echo -n "$COMPUTE_NODE_MODEL_NAME.$CLUSTER_DOMAIN_NAME " >> $HOSTS_FILE
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echo $COMPUTE_NODE_MODEL_NAME >> $HOSTS_FILE
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echo \# The following lines are desirable for IPv6 capable hosts >> $HOSTS_FILE
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echo ::1     ip6-localhost ip6-loopback >> $HOSTS_FILE
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echo fe00::0 ip6-localnet >> $HOSTS_FILE
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echo ff00::0 ip6-mcastprefix >> $HOSTS_FILE
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echo ff02::1 ip6-allnodes >> $HOSTS_FILE
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echo ff02::2 ip6-allrouters >> $HOSTS_FILE
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echo
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echo Copy the \"$HOSTS_FILE\" file to the frontend.
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echo
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# Front-end stuff.
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echo -n "${CLUSTER_STATIC_NETWORK_PREFIX}.${CONST_FRONT_END_CLUSTER_STATIC_NETWORK_POSTFIX} " 1>&5
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echo -n "${FRONT_END_HOST_NAME}.${CLUSTER_DOMAIN_NAME} " 1>&5
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echo "$FRONT_END_HOST_NAME" 1>&5
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# Compute node model stuff.
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echo -n "${CLUSTER_STATIC_NETWORK_PREFIX}.${CONST_COMPUTE_NODE_MODEL_CLUSTER_STATIC_NETWORK_POSTFIX} " 1>&5
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echo -n "${COMPUTE_NODE_MODEL_HOST_NAME}.${CLUSTER_DOMAIN_NAME} " 1>&5
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echo "$COMPUTE_NODE_MODEL_HOST_NAME" 1>&5
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#
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# IPv6 stuff
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echo "#" 1>&5
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echo "# The following lines are desirable for IPv6 capable hosts" 1>&5
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echo "::1 ip6-localhost ip6-loopback" 1>&5
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echo "fe00::0 ip6-localnet" 1>&5
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echo "ff00::0 ip6-mcastprefix" 1>&5
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echo "ff02::1 ip6-allnodes" 1>&5
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echo "ffO2::2 ip6-allraouters" 1>&5
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exec 5>&-
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exit 0

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