lc_lvm.in

来自「lustre 1.6.5 source code」· IN 代码 · 共 594 行 · 第 1/2 页

    declare -i i=$1
    local lvm_cmd

    case "${LINE_MARKER[i]}" in
    "${PV_MARKER}")
        lvm_cmd="pvcreate -ff -y ${OP_OPTS[i]} ${LVM_NAME[i]}"
        ;;
    "${VG_MARKER}")
        lvm_cmd="vgcreate ${OP_OPTS[i]} ${LVM_NAME[i]} ${SIXTH_ITEM[i]}"
        ;;
    "${LV_MARKER}")
        if [ -z "${LVM_NAME[i]}" ]; then
            lvm_cmd="lvcreate -L ${SIXTH_ITEM[i]} ${OP_OPTS[i]} ${SEVENTH_ITEM[i]}"
        else
            lvm_cmd="lvcreate -L ${SIXTH_ITEM[i]} -n ${LVM_NAME[i]} ${OP_OPTS[i]} ${SEVENTH_ITEM[i]}"
        fi
        ;;
    esac

    echo ${lvm_cmd}
    return 0
}

# cmdline_rm_LVs vg_name
#
# Construct command line to remove all the LVs on $vg_name.
# If $vg_name is null, then remove all the LVs in the host.
cmdline_rm_LVs() {
    local vg_name=$1
    local lvm_rm_cmd

    lvm_rm_cmd="vgchange -a n ${vg_name} &&"
    lvm_rm_cmd=${lvm_rm_cmd}" vgdisplay -v ${vg_name} | grep \"LV Name\" | awk '{print \$3}' |"
    lvm_rm_cmd=${lvm_rm_cmd}" while read lv; do lvremove -f \$lv; done"

    echo ${lvm_rm_cmd}
    return 0
}

# cmdline_rm_LV lv_path
#
# Construct command line to remove LV $lv_path
cmdline_rm_LV() {
    local lv_path=$1
    local lvm_rm_cmd

    lvm_rm_cmd="lvchange -a n ${lv_path} && lvremove -f ${lv_path}"
    echo ${lvm_rm_cmd}
    return 0
}


# cmdline_rm_VG vg_name
#
# Construct command line to remove VG $vg_name
cmdline_rm_VG() {
    local vg_name=$1
    local lvm_rm_cmd

    # Remove all the LVs on this VG
    lvm_rm_cmd=$(cmdline_rm_LVs ${vg_name})

    # Remove this VG
    lvm_rm_cmd=${lvm_rm_cmd}" && vgremove ${vg_name}"
    echo ${lvm_rm_cmd}
    return 0
}

# cmdline_rm_VGs
#
# Construct command line to remove all the VGs in the host
cmdline_rm_VGs() {
    local lvm_rm_cmd

    # Remove all the LVs in the host
    lvm_rm_cmd=$(cmdline_rm_LVs)

    # Remove all the VGs in the host
    lvm_rm_cmd=${lvm_rm_cmd}" && vgdisplay | grep \"VG Name\" | awk '{print \$3}' |"
    lvm_rm_cmd=${lvm_rm_cmd}" while read vg; do vgremove \$vg; done"

    echo ${lvm_rm_cmd}
    return 0
}

# cmdline_rm_PVs
#
# Construct command line to remove all the PVs in the host
cmdline_rm_PVs() {
    local lvm_rm_cmd

    # Remove all the LVs and VGs in the host
    lvm_rm_cmd=$(cmdline_rm_VGs)

    # Remove all the PVs in the host
    lvm_rm_cmd=${lvm_rm_cmd}" && pvdisplay | grep \"PV Name\" | awk '{print \$3}' |"
    lvm_rm_cmd=${lvm_rm_cmd}" while read pv; do pvremove -ff -y \$pv; done"

    echo ${lvm_rm_cmd}
    return 0
}

# construct_lvm_teardown_cmdline index
#
# Construct the teardown command line for LVM devices in ${HOST_NAME[index]}
construct_lvm_teardown_cmdline() {
    declare -i i=$1
    local lvm_rm_cmd

    case "${LINE_MARKER[i]}" in
    "${LV_MARKER}")
        lvm_rm_cmd=$(cmdline_rm_LVs ${SEVENTH_ITEM[i]})
        ;;
    "${VG_MARKER}")
        # Remove all the VGs in the host
        lvm_rm_cmd=$(cmdline_rm_VGs)
        ;;
    "${PV_MARKER}")
        # Remove all the PVs in the host
        lvm_rm_cmd=$(cmdline_rm_PVs)
        ;;
    esac

    echo ${lvm_rm_cmd}
    return 0
}

# construct_lvm_rm_cmdline index
#
# Construct the remove command line for LVM device ${LVM_NAME[index]}
construct_lvm_rm_cmdline() {
    declare -i i=$1
    local lvm_rm_cmd
                        
    case "${LINE_MARKER[i]}" in
    "${LV_MARKER}")
        lvm_rm_cmd=$(cmdline_rm_LV ${LVM_NAME[i]})
        ;;
    "${VG_MARKER}")
        lvm_rm_cmd=$(cmdline_rm_VG ${LVM_NAME[i]})
        ;;
    "${PV_MARKER}")
        lvm_rm_cmd="pvremove -ff -y ${LVM_NAME[i]}"
        ;;
    esac

    echo ${lvm_rm_cmd}
    return 0
}

# construct_lvm_cmdline host_name
#
# Construct the command line of LVM utilities to be run in the $host_name
construct_lvm_cmdline() {
    LVM_CMDLINE=
    local host_name=$1
    local lvm_cmd
    declare -i i

    # Construct command line
    for ((i = 0; i < ${#HOST_NAME[@]}; i++)); do
        lvm_cmd=
        if [ "${host_name}" = "${HOST_NAME[i]}" ]; then
            case "${OP_MODE[i]}" in
            "" | create)
                    # Construct the create command line
                    lvm_cmd=$(construct_lvm_create_cmdline ${i})
                    ;;
            remove)
                    if [ -z "${LVM_NAME[i]}" ]; then
                        # Construct the teardown command line
                        lvm_cmd=$(construct_lvm_teardown_cmdline ${i})
                    else    # Remove instead of teardown
                        # Construct the remove command line
                        lvm_cmd=$(construct_lvm_rm_cmdline ${i})
                    fi
                    ;;
            *)
                echo >&2 "`basename $0`: construct_lvm_cmdline() error:"\
                         "Invalid operation mode - \"${OP_MODE[i]}\"!"
                return 1
                ;;
            esac

            if [ -z "${LVM_CMDLINE}" ]; then
                LVM_CMDLINE=${lvm_cmd}
            else
                LVM_CMDLINE=${LVM_CMDLINE}" && "${lvm_cmd}
            fi
        fi
    done

    return 0
}

# config_lvm_devs host_name
#
# Run remote command to configure LVM devices in $host_name
config_lvm_devs() {
    local host_name=$1

    # Construct the LVM utilities command line
    if ! construct_lvm_cmdline ${host_name}; then
        return 1
    fi
    
    if [ -z "${LVM_CMDLINE}" ]; then
        verbose_output "There are no LVM devices on host ${host_name}"\
        "needed to be configured."
        return 0
    fi

    # Run remote command to configure LVM devices in $host_name
    verbose_output "Configuring LVM devices in host ${host_name}..."
    verbose_output "Configure command line is: \"${LVM_CMDLINE}\""
    REMOTE_CMD[pid_num]="${REMOTE} ${host_name} \"${LVM_CMDLINE}\""
    ${REMOTE} ${host_name} "(${EXPORT_PATH} ${LVM_CMDLINE})" >&2 &
    REMOTE_PID[pid_num]=$!
    let "pid_num += 1"

    return 0
}

# Run remote command to configure all the LVM devices specified
# in the csv file
config_lvm() {
    declare -i i=0
    declare -i idx=0        # Index of NODE_NAME array
    local host_name
    local failed_status

    # Initialize the NODE_NAME array
    unset NODE_NAME

    for ((i = 0; i < ${#HOST_NAME[@]}; i++)); do
        host_name=${HOST_NAME[i]}
        configured_host ${host_name} && continue

        NODE_NAME[idx]=${host_name}
        let "idx += 1"

        # Run remote command to configure LVM devices in $host_name
        if ! config_lvm_devs ${host_name}; then
            return 1
        fi
    done

    if [ ${#HOST_NAME[@]} -eq 0 -o ${#REMOTE_PID[@]} -eq 0 ]; then
        verbose_output "There are no LVM devices to be configured."
        return 0
    fi

    # Wait for the exit status of the background remote command
    verbose_output "Waiting for the return of the remote command..."
    failed_status=false
    for ((pid_num = 0; pid_num < ${#REMOTE_PID[@]}; pid_num++)); do
        wait ${REMOTE_PID[${pid_num}]}
        if [ ${PIPESTATUS[0]} -ne 0 ]; then
            echo >&2 "`basename $0`: config_lvm() error: Failed"\
                 "to execute \"${REMOTE_CMD[${pid_num}]}\"!"
            failed_status=true
        fi
    done

    if ${failed_status}; then
        return 1
    fi

    verbose_output "All the LVM devices are configured successfully!"
    return 0
}

# Main flow
# Check the csv file
if ! check_file $1; then
    exit 1    
fi

# Get the list of nodes to be operated on
NODES_TO_USE=$(get_nodelist)
[ ${PIPESTATUS[0]} -ne 0 ] && echo >&2 "${NODES_TO_USE}" && exit 1

# Check the node list
check_nodelist ${NODES_TO_USE} || exit 1

# Get all the LVM device items from the csv file 
if ! get_lvm_items ${CSV_FILE}; then
    exit 1
fi

# Configure the LVM devices 
if ! config_lvm; then
    exit 1
fi

exit 0