Kubernetes v1.6 flex volume driver

vol_driver

#!/bin/bash

# Copyright 2015 The Kubernetes Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

usage() {
        err "Invalid usage. Usage: "
        err "\t$0 init"
        err "\t$0 mount <mount dir> <json params>"
        err "\t$0 unmount <mount dir>"
        exit 1
}

err() {
        echo -ne $* 1>&2
}

log() {
        echo -ne $* >&1
}

domount() {
        MNTPATH=$1

        mkdir "/tmp/target_dir"
        mkdir -p ${MNTPATH} &> /dev/null

        mount -o bind /tmp/target_dir ${MNTPATH}
        if [ $? -ne 0 ]; then
                err "{ \"status\": \"Failure\", \"message\": \"Failed to mount at ${MNTPATH}\"}"
                exit 1
        fi
        log "{\"status\": \"Success\"}"
        exit 0
}

unmount() {
        MNTPATH=$1
        umount ${MNTPATH} &> /dev/null
        if [ $? -ne 0 ]; then
                err "{ \"status\": \"Failed\", \"message\": \"Failed to unmount volume at ${MNTPATH}\"}"
                exit 1
        fi

        log "{\"status\": \"Success\"}"
g "{\"status\": \"Success\"}"
        exit 0
}

op=$1

if [ "$op" = "init" ]; then
        log "{\"status\": \"Success\", \"capabilities\": {\"attach\": false}}"
        exit 0
fi

if [ $# -lt 2 ]; then
        usage
fi

shift

case "$op" in
        mount)
                domount $*
                ;;
        unmount)
                unmount $*
                ;;
        *)
                log "{ \"status\": \"Not supported\" }"
                exit 0
esac

exit 1