Created
May 9, 2017 12:28
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Kubernetes FlexVolume Driver POC for OpenStack Cinder
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#!/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. | |
# Based on this excellent blog post by Ivan - http://blog.e0ne.info/post/Attach-Cinder-Volume-to-the-Ironic-Instance-without-Nova.aspx | |
export OS_PROJECT_DOMAIN_ID=default | |
export OS_USER_DOMAIN_ID=default | |
export OS_PROJECT_NAME=admin | |
export OS_PASSWORD=secret | |
export OS_AUTH_URL=http://10.0.0.2/identity | |
export OS_USERNAME=admin | |
export PATH=$PATH:/lib/udev | |
# Notes: | |
# - Please install "jq" package before using this driver. | |
usage() { | |
err "Invalid usage. Usage: " | |
err "\t$0 init" | |
err "\t$0 attach <json params> <nodename>" | |
err "\t$0 detach <mount device> <nodename>" | |
err "\t$0 waitforattach <mount device> <json params>" | |
err "\t$0 mountdevice <mount dir> <mount device> <json params>" | |
err "\t$0 unmountdevice <mount dir>" | |
err "\t$0 getvolumename <json params>" | |
err "\t$0 isattached <json params> <nodename>" | |
exit 1 | |
} | |
err() { | |
echo -ne $* 1>&2 | |
} | |
log() { | |
echo -ne $* >&1 | |
} | |
ismounted() { | |
MOUNT=`findmnt -n ${MNTPATH} 2>/dev/null | cut -d' ' -f1` | |
if [ "${MOUNT}" == "${MNTPATH}" ]; then | |
echo "1" | |
else | |
echo "0" | |
fi | |
} | |
getdevice() { | |
VOLUMEID=$(echo ${JSON_PARAMS} | jq -r '.volumeID') | |
DMDEV="/dev/disk/by-path/$(ls -1 /dev/disk/by-path/ | grep $VOLUMEID)" | |
echo ${DMDEV} | |
} | |
attach() { | |
JSON_PARAMS=$1 | |
SIZE=$(echo $1 | jq -r '.size') | |
VOLUMEID=$(echo ${JSON_PARAMS} | jq -r '.volumeID') | |
sudo -E PATH=$PATH cinder local-attach $VOLUMEID >> /tmp/cinder2.log 2>&1 | |
DMDEV=$(getdevice) | |
if [ ! -b "${DMDEV}" ]; then | |
err "{\"status\": \"Failure\", \"message\": \"Volume ${VOLUMEID} does not exist\"}" | |
exit 1 | |
fi | |
log "{\"status\": \"Success\", \"device\":\"${DMDEV}\"}" | |
exit 0 | |
} | |
detach() { | |
log "{\"status\": \"Success\"}" | |
exit 0 | |
} | |
waitforattach() { | |
#shift | |
#attach $* | |
log "{\"status\": \"Success\"}" | |
exit 0 | |
} | |
domountdevice() { | |
MNTPATH=$1 | |
JSON_PARAMS=$2 | |
DMDEV=$(getdevice) | |
FSTYPE=$(echo $JSON_PARAMS|jq -r '.["kubernetes.io/fsType"]') | |
if [ ! -b "${DMDEV}" ]; then | |
err "{\"status\": \"Failure\", \"message\": \"${DMDEV} does not exist\"}" | |
exit 1 | |
fi | |
if [ $(ismounted) -eq 1 ] ; then | |
log "{\"status\": \"Success\"}" | |
exit 0 | |
fi | |
VOLFSTYPE=`blkid -o udev ${DMDEV} 2>/dev/null|grep "ID_FS_TYPE"|cut -d"=" -f2` | |
if [ "${VOLFSTYPE}" == "" ]; then | |
mkfs -t ${FSTYPE} ${DMDEV} >/dev/null 2>&1 | |
if [ $? -ne 0 ]; then | |
err "{ \"status\": \"Failure\", \"message\": \"Failed to create fs ${FSTYPE} on device ${DMDEV}\"}" | |
exit 1 | |
fi | |
fi | |
mkdir -p ${MNTPATH} &> /dev/null | |
mount ${DMDEV} ${MNTPATH} &> /dev/null | |
if [ $? -ne 0 ]; then | |
err "{ \"status\": \"Failure\", \"message\": \"Failed to mount device ${DMDEV} at ${MNTPATH}\"}" | |
exit 1 | |
fi | |
log "{\"status\": \"Success\"}" | |
exit 0 | |
} | |
unmountdevice() { | |
MNTPATH=$1 | |
if [ ! -d ${MNTPATH} ]; then | |
log "{\"status\": \"Success\"}" | |
exit 0 | |
fi | |
if [ $(ismounted) -eq 0 ] ; then | |
log "{\"status\": \"Success\"}" | |
exit 0 | |
fi | |
umount ${MNTPATH} &> /dev/null | |
if [ $? -ne 0 ]; then | |
err "{ \"status\": \"Failed\", \"message\": \"Failed to unmount volume at ${MNTPATH}\"}" | |
exit 1 | |
fi | |
$VOLUMEID=$(echo ${MNTPATH} | sed -r "s/^.*volume-(.*)-lun.*/\1/") | |
sudo -E PATH=$PATH cinder local-detach $VOLUMEID >> /tmp/cinder2.log 2>&1 | |
log "{\"status\": \"Success\"}" | |
exit 0 | |
} | |
getvolumename() { | |
JSON_PARAMS=$1 | |
UUID=$(echo ${JSON_PARAMS} | jq -r '.volumeID') | |
log "{\"status\": \"Success\", \"volumeName\":\"${UUID}\"}" | |
exit 0 | |
} | |
isattached() { | |
log "{\"status\": \"Success\", \"attached\":true}" | |
exit 0 | |
} | |
op=$1 | |
if [ "$op" = "init" ]; then | |
log "{\"status\": \"Success\"}" | |
exit 0 | |
fi | |
if [ $# -lt 2 ]; then | |
usage | |
fi | |
shift | |
case "$op" in | |
attach) | |
attach $* | |
;; | |
detach) | |
detach $* | |
;; | |
waitforattach) | |
waitforattach $* | |
;; | |
mountdevice) | |
domountdevice $* | |
;; | |
unmountdevice) | |
unmountdevice $* | |
;; | |
getvolumename) | |
getvolumename $* | |
;; | |
isattached) | |
isattached $* | |
;; | |
*) | |
err "{ \"status\": \"Not supported\" }" | |
exit 1 | |
esac | |
exit 1 |
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#!/bin/bash | |
echo "=================== Begin " $(date) "===================" >> /tmp/cinder2.log | |
echo "$*" | tee >(ts >> /tmp/cinder2.log;) > /dev/null | |
/usr/libexec/kubernetes/kubelet-plugins/volume/exec/cinder $* 2>&1 | tee >(ts >> /tmp/cinder2.log; echo "" >> /tmp/cinder2.log) |
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apiVersion: v1 | |
kind: Pod | |
metadata: | |
name: nginx | |
namespace: default | |
spec: | |
containers: | |
- name: nginx | |
image: nginx | |
volumeMounts: | |
- name: test | |
mountPath: /data | |
ports: | |
- containerPort: 80 | |
volumes: | |
- name: test | |
flexVolume: | |
driver: "dims.io/cinder2" | |
fsType: "ext4" | |
options: | |
volumeID: "a7fbeab2-aa49-4a7e-810e-d388221a85aa" | |
size: "1m" |
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