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Diffstat (limited to 'charms/trusty/cassandra/scripts/volume-common.sh')
| -rwxr-xr-x | charms/trusty/cassandra/scripts/volume-common.sh | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/charms/trusty/cassandra/scripts/volume-common.sh b/charms/trusty/cassandra/scripts/volume-common.sh deleted file mode 100755 index 3af8ff1..0000000 --- a/charms/trusty/cassandra/scripts/volume-common.sh +++ /dev/null @@ -1,220 +0,0 @@ -#!/bin/bash -# Author: JuanJo Ciarlante <jjo@canonical.com> -# Copyright: Canonical Ltd. 2012 -# License: GPLv2 -# -# juju storage common shell library -# - -#------------------------------ -# Returns a mount point from passed vol-id, e.g. /srv/juju/vol-000012345 -# -# @param $1 volume id -# @echoes mntpoint-path eg /srv/juju/vol-000012345 -#------------------------------ -_mntpoint_from_volid() { - local volid=${1?missing volid} - [[ ${volid} != "" ]] && echo /srv/juju/${volid} || echo "" -} - - -#------------------------------ -# Assert that passed mount points hold different filesystems -# -# @param $1 mntpoint1 -# @param $2 mntpoint2 -# @return 0 different FS -# 1 same FS -#------------------------------ -_assert_diff_fs() { - local mnt1="${1:?missing mntpoint1}" - local mnt2="${2:?missing mntpoint2}" - local fsid1 fsid2 - fsid1=$(stat --file-system -c '%i' "${mnt1}" 2>/dev/null) - fsid2=$(stat --file-system -c '%i' "${mnt2}" 2>/dev/null) - [[ ${fsid1} != ${fsid2} ]] - return $? -} - -#------------------------------ -# Initialize volume (sfdisk, mkfs.ext4) IFF NOT already, mount it at -# /srv/juju/<volume-id> -# -# @param $1 volume-id, can be any arbitrary string, better if -# equal to EC2/OS vol-id name (just for consistency) -# @return 0 success -# 1 nil volid/etc -# 2 error while handling the device (non-block device, sfdisk error, etc) -#------------------------------ -volume_init_and_mount() { - ## Find 1st unused device (reverse sort /dev/vdX) - local volid=${1:?missing volid} - local dev_regexp - local dev found_dev= - local label="${volid}" - local func=${FUNCNAME[0]} - dev_regexp=$(config-get volume-dev-regexp) || return 1 - mntpoint=$(_mntpoint_from_volid ${volid}) - - [[ -z ${mntpoint} ]] && return 1 - if mount | egrep -qw "${mntpoint}";then - _assert_diff_fs "/" "${mntpoint}" || { - juju-log "ERROR: returning from ${func} with '${mntpoint}' still at '/' filesystem" - return 1 - } - juju-log "NOTICE: mntpoint=${mntpoint} already mounted, skipping volume_init_and_mount" - return 0 - fi - - # Sanitize - case "${dev_regexp?}" in - # Careful: this is glob matching against an regexp - - # quite narrowed - /dev/*|/dev/disk/by-*) - ;; ## Ok - *) - juju-log "ERROR: invalid 'volume-dev-regexp' specified" - return 1 - ;; - esac - - # Assume udev will create only existing devices - for dev in $(ls -rd1 /dev/* | egrep "${dev_regexp}" | egrep -v "[1-9]$" 2>/dev/null);do - ## Check it's not already mounted - mount | egrep -q "${dev}[1-9]?" || { found_dev=${dev}; break;} - done - [[ -n "${found_dev}" ]] || { - juju-log "ERROR: ${func}: coult not find an unused device for regexp: ${dev_regexp}" - return 1 - } - partition1_dev=${found_dev}1 - - juju-log "INFO: ${func}: found_dev=${found_dev}" - [[ -b ${found_dev?} ]] || { - juju-log "ERROR: ${func}: ${found_dev} is not a blockdevice" - return 2 - } - - # Run next set of "dangerous" commands as 'set -e', in a subshell - ( - set -e - # Re-read partition - will fail if already in use - blockdev --rereadpt ${found_dev} - - # IFF not present, create partition with full disk - if [[ -b ${partition1_dev?} ]];then - juju-log "INFO: ${func}: ${partition1_dev} already present - skipping sfdisk." - else - juju-log "NOTICE: ${func}: ${partition1_dev} not present at ${found_dev}, running: sfdisk ${found_dev} ..." - # Format partition1_dev as max sized - echo ",+," | sfdisk ${found_dev} - fi - - # Create an ext4 filesystem if NOT already present - # use e.g. LABEl=vol-000012345 - if file -s ${partition1_dev} | egrep -q ext4 ; then - juju-log "INFO: ${func}: ${partition1_dev} already formatted as ext4 - skipping mkfs.ext4." - ## Check e2label - log if it has changed (e.g. already used / initialized with a diff label) - local curr_label=$(e2label "${partition1_dev}") - if [[ ${curr_label} != ${label} ]]; then - juju-log "WARNING: ${func}: ${partition1_dev} had label=${curr_label}, overwritting with label=${label}" - e2label ${partition1_dev} "${label}" - fi - else - juju-log "NOTICE: ${func}: running: mkfs.ext4 -L ${label} ${partition1_dev}" - mkfs.ext4 -L "${label}" ${partition1_dev} - fi - - # Mount it at e.g. /srv/juju/vol-000012345 - [[ -d "${mntpoint}" ]] || mkdir -p "${mntpoint}" - mount | fgrep -wq "${partition1_dev}" || { - local files_below_mntpoint="$(cd ${mntpoint}; ls -1A |wc -l )" - if [[ ${files_below_mntpoint} -ne 0 ]]; then - juju-log "ERROR: *not* doing 'mount "${partition1_dev}" "${mntpoint}"' because there are already ${files_below_mntpoint} files/dirs beneath '${mntpoint}'" - exit 1 - fi - ## should always fsck before mounting (e.g. fsck after max time (-i) / max mounts (-c) ) - fsck "${partition1_dev}" - mount "${partition1_dev}" "${mntpoint}" - juju-log "INFO: ${func}: mounted as: '$(mount | fgrep -w ${partition1_dev})'" - } - - # Add it to fstab is not already there - fgrep -wq "LABEL=${label}" /etc/fstab || { - echo "LABEL=${label} ${mntpoint} ext4 defaults,nobootwait,comment=${volid}" | tee -a /etc/fstab - juju-log "INFO: ${func}: LABEL=${label} added to /etc/fstab" - } - ) - # Final assertion: mounted filesystem id is different from '/' (effectively mounted) - _assert_diff_fs "/" "${mntpoint}" || { - juju-log "ERROR: returning from ${func} with '${mntpoint}' still at '/' filesystem (couldn't mount new volume)" - ## try to rmdir mntpoint directory - should not be 'mistakenly' used - rmdir ${mntpoint} - return 1 - } - return $? -} - -#------------------------------ -# Get volume-id from juju config "volume-map" dictionary as -# volume-map[JUJU_UNIT_NAME] -# @return 0 if volume-map value found ( does echo volid or ""), else: -# 1 if not found or None -# -#------------------------------ -volume_get_volid_from_volume_map() { - local volid=$(config-get "volume-map"|python -c$'import sys;import os;from yaml import load;from itertools import chain; volume_map = load(sys.stdin)\nif volume_map: print volume_map.get(os.environ["JUJU_UNIT_NAME"])') - [[ $volid == None ]] && return 1 - echo "$volid" -} - -# Returns true if permanent storage (considers --ephemeral) -# @returns 0 if volid set and not --ephemeral, else: -# 1 -volume_is_permanent() { - local volid=${1:?missing volid} - [[ -n ${volid} && ${volid} != --ephemeral ]] && return 0 || return 1 -} -volume_mount_point_from_volid(){ - local volid=${1:?missing volid} - if volume_is_permanent "${volid}";then - echo "/srv/juju/${volid}" - return 0 - else - return 1 - fi -} -# Do we have a valid storage state? -# @returns 0 does echo $volid (can be "--ephemeral") -# 1 config state is invalid - we should not serve -volume_get_volume_id() { - local ephemeral_storage - local volid - ephemeral_storage=$(config-get volume-ephemeral-storage) || return 1 - volid=$(volume_get_volid_from_volume_map) || return 1 - if [[ $ephemeral_storage == True ]];then - # Ephemeral -> should not have a valid volid - if [[ $volid != "" ]];then - juju-log "ERROR: volume-ephemeral-storage is True, but $JUJU_UNIT_NAME maps to volid=${volid}" - return 1 - fi - else - # Durable (not ephemeral) -> must have a valid volid for this unit - if [[ $volid == "" ]];then - juju-log "ERROR: volume-ephemeral-storage is False, but no volid found for: $JUJU_UNIT_NAME" - return 1 - fi - fi - echo "$volid" - return 0 -} - -case "$1" in - ## allow non SHELL scripts to call helper functions - call) - : ${JUJU_UNIT_NAME?} ## Must be called in juju environment - shift; - function="${1:?usage: ${0##*/} call function arg1 arg2 ...}" - shift; - ${function} "$@" && exit 0 || exit 1 -esac |