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openafs-part1

  1. yum groupinstall -y “Development Tools”, on my vagrant box scalefactory/centos6 , need to isntall ncurses too.
  2. yum update -y
  3. download openafs server from openafs website OpenAFS 1.6.20.1, 16MB
  4. ./configure –prefix=/usr/local/packages/openafs
  5. make, make install
  6. copy /etc/openafs from existing server
  7. in /etc/openafs/server, there is
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    i. CellServDB
    >example.com
    10.0.2.15
    ii. ThisCell
    srv.example.com
    iii.UserList
    afsadmin
  8. in /etc/openafs there is cacheinfo
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    /afs:/usr/local/packages/cache:500000

    might want to make a folder called /usr/local/packages/cache for it..

  9. its dangerous to go alone, take this:
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    #!/bin/bash
    #
    # Graceful AFS start and stop script.
    # Written by: [email protected]
    # Date 5th July 2008
    STOP_RETRIES=10 # seconds to attempt afs shutdown
    AFS=/usr/local/packages/openafs # where afs lives – symblink to current afs ver
    AFS_DB=”afs60 afs61 afs62″ # list of afs database servers
    case $1 in
    ‘start’)
    # Get a list of afs database servers first.
    DB=””
    REACHABLE=0
    CELLSERVDB=”$AFS/etc/openafs/CellServDB”
    for I in $AFS_DB ; do
    HOST=`grep $I $CELLSERVDB | awk ‘{print $1}’`
    if [ -z “$HOST” ] ; then
    echo “FATAL! Cannot locate $I in $CELLSERVDB”
    exit 1
    fi
    # do a simple ping test first.
    if [ “`uname -s`” = “SunOS” ] ; then
    ping -n -s $HOST 40 3 >/dev/null 2>/dev/null
    else
    ping -n -c 3 $HOST >/dev/null 2>/dev/null
    fi
    if [ $? -eq 0 ] ; then
    echo “$HOST ping test passed.”
    # use “bos” to test if afs database services are running.
    BOS=$AFS/bin/bos
    N=`$BOS status $HOST -noauth | grep running | wc -l | awk ‘{print $1}’`
    if [ $N -ge 4 ] ; then
    echo “$HOST bos status passed.”
    REACHABLE=1
    break
    else
    echo “WARNING! AFS services not running normally on $HOST.”
    fi
    else
    echo “WARNING! $HOST is not responding to ping.”
    fi
    done
    # only fire up AFS if at least 1 database server is reachable.
    if [ $REACHABLE -eq 0 ] ; then
    echo “FATAL! No AFS database servers reachable.”
    exit 1
    fi
    # check afs system call number (Solaris only) and load kernel module.
    if [ “`uname -s`” = “SunOS” ] ; then
    SYSNUM=`grep afs /etc/name_to_sysnum | awk ‘{print $2}’`
    if [ -z “$SYSNUM” ] ; then
    echo “FATAL! AFS name_to_sysnum not configured.”
    exit 1
    else
    if [ $SYSNUM -ne 65 ] ; then
    echo “FATAL! AFS name_to_sysnum not 65.”
    exit 1
    fi
    fi
    modload /kernel/fs/afs
    if [ $? -ne 0 ] ; then
    echo “FATAL! Failed to load AFS kernel module.”
    exit 1
    fi
    fi
    # on Linux we do a insmod
    if [ “`uname -s`” = “Linux” ] ; then
    insmod $AFS/lib/openafs/libafs.ko
    if [ $? -ne 0 ] ; then
    echo “FATAL! Failed to load AFS kernel module.”
    exit 1
    fi
    fi
    # the very last check is to make sure that /afs exists.
    if [ ! -d /afs ] ; then
    mkdir /afs
    if [ $? -ne 0 ] ; then
    exit 1
    fi
    fi
    # if we have a dedicated afs cache filesystem, mount it now,
    if [ -b /dev/zvol/dsk/mud/afs-cache ] ; then
    if [ ! -d /var/afs-cache ] ; then
    mkdir /var/afs-cache
    chmod 700 /var/afs-cache
    fi
    mount -o nologging /dev/zvol/dsk/mud/afs-cache /var/afs-cache
    fi
    # finally, check whether to use memory cache or not.
    mount | grep ‘/var/afs-cache’ >/dev/null
    if [ $? -eq 0 ] ; then
    $AFS/sbin/afsd
    else
    echo “starting with memcache”
    $AFS/sbin/afsd -memcache
    fi
    # allow setuid bit on /afs.
    if [ $? -eq 0 ] ; then
    $AFS/bin/fs setcell bii.a-star.edu.sg -suid
    fi
    ;;
    ‘stop’)
    # check if /afs is mounted, if not mounted, don’t bother.
    mount | grep AFS >/dev/null
    if [ “$?” != “0” ] ; then
    “FATAL! /afs is not mounted.”
    exit 1
    fi
    # check for processes using /afs, kill them before we continue.
    RETRIES=$STOP_RETRIES
    HALF_WAY=$(($STOP_RETRIES / 2))
    while [ $RETRIES -gt 0 ] ; do
    PIDS=`fuser /afs 2>/dev/null | cut -f 2- -d ‘ ‘ | sed -e ‘s/[^0-9 \t]//g’`
    if [ -z “$PIDS” ] ; then
    break
    fi
    if [ $RETRIES -gt $HALF_WAY ] ; then
    kill $PIDS
    else
    kill -9 $PIDS
    fi
    sleep 1
    RETRIES=$(($RETRIES – 1))
    done
    # at this point, it *should* be safe to umount /afs.
    $AFS/bin/fs flush
    umount /afs
    /sbin/rmmod libafs
    ;;
    ‘check’)
    $AFS/bin/fs checkservers
    $AFS/bin/fs checkvolumes
    ;;
    *)
    echo “Usage : $0 { start | stop | check }”
    ;;
    esac