Using drbdmanage in multi-node setups.
This should basically be useful standalone (on bare-bones) nodes, too, to add storage nodes to an OpenStack cluster. Furthermore, try to get rid of some "long line" warnings. Change-Id: I9e6d4131928e81262d6111b92f757ffc0ccc52d2
This commit is contained in:
Philipp Marek
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16
README.rst
16
README.rst
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@ -12,4 +12,18 @@ This plugin helps to install the DRBD backend for Cinder
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Usage
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-----
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????
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Put some lines similar to these in your `local.conf`:
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enable_plugin drbd-devstack git://git.openstack.org/stackforge/drbd-devstack
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enable_service drbd-devstack
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CINDER_ENABLED_BACKENDS=drbd:drbdmanage
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A few environment variables can be set to modify the behaviour:
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* `CINDER_DRBD_NO_STORAGE` means `--no-storage`
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* `CINDER_DRBD_NO_CV` gets translated to `--no-control-volume`.
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This is allowed only for additional nodes, and not the initial drbdmanage node that *has* to create a control volume.
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Secondary nodes are detected by having `$SERVICE_HOST` unequal to `$HOST_IP`, and therefore register themselves as additional nodes in drbdmanage.
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@ -1,6 +1,9 @@
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#!/bin/bash
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# vim: set et ts=4 sw=4 ft=sh :
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#
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DRBDMANAGE_DBUS_AUTH_FILE=/etc/dbus-1/system.d/org.drbd.drbdmanaged-stack.conf
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DRBDBASEURL=http://openstack-ci-pkgs.linbit.com/packages/003/trusty
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function pre_install_drbd_devstack {
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# Install OS packages, if necessary
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@ -9,32 +12,35 @@ function pre_install_drbd_devstack {
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fi
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packages=(
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drbd-utils_8.9.4-1_amd64.deb
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drbd8-utils_8.9.4-1_amd64.deb
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drbd-dkms_9.0.0-2_all.deb
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drbd-utils_8.9.4-1_amd64.deb
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python-drbdmanage_0.50-1.1_all.deb
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python-drbdmanage_0.50-1.2_all.deb
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)
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# get packages
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for p in "${packages[@]}"; do
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if [[ ! -f "${FILES}/${p}" ]]; then
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# If there are newer packages, change the download number here.
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wget "http://openstack-ci-pkgs.linbit.com/packages/003/trusty/$p" -O "${FILES}/${p}"
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wget "$DRBDBASEURL/$p" -O "${FILES}/${p}"
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fi
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done
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# install packages
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sudo apt-get update
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sudo apt-get install --yes debhelper python-dbus dbus \
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lvm2 thin-provisioning-tools
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for i in "${packages[@]}"; do
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if [[ -f "${FILES}/${i}" ]]; then
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echo "installing ${i}"
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sudo dpkg -i "${FILES}/${i}" || true
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sudo dpkg --force-confnew --install "${FILES}/${i}" || true
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fi
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done
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# now go fetch :)
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echo echo "installing deps"
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#sudo apt-get update
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sudo apt-get install -f -y
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sudo apt-get install python-dbus -y
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sudo apt-get install --fix-broken --yes
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return 0
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}
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@ -43,7 +49,8 @@ function install_drbd_devstack {
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# Write DRBDmanage configuration;
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# use the single-thinpool driver for these tests.
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sudo sed -i "s/^drbdctrl-vg\s*=.*/drbdctrl-vg = ${DRBD_DRBDCTRL_VG}/g" /etc/drbdmanaged.cfg
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sudo sed -i "s/^drbdctrl-vg\s*=.*/drbdctrl-vg = ${DRBD_DRBDCTRL_VG}/g" \
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/etc/drbdmanaged.cfg
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echo "
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[LOCAL]
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storage-plugin = drbdmanage.storage.lvm_thinlv.LvmThinLv
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@ -55,7 +62,7 @@ pool-name = drbdthinpool
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" | sudo tee /etc/drbdmanaged.cfg
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# allow the stack user access to drbdmanage
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sudo tee /etc/dbus-1/system.d/org.drbd.drbdmanaged-stack.conf > /dev/null << "EOF"
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sudo tee "$DRBDMANAGE_DBUS_AUTH_FILE" > /dev/null << "EOF"
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<!DOCTYPE busconfig PUBLIC
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"-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
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"http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
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@ -69,6 +76,10 @@ EOF
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# done.
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}
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function _find_lo_for_dev {
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sudo losetup -a | grep "$1"
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}
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function _drbd_make_vg {
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local vg_name="${1:?No VG name given}"
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local vg_size="$2"
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@ -93,7 +104,7 @@ function _drbd_make_vg {
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fi
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# if the file is already assigned a loop device, don't reassign
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if ! sudo losetup -a | grep "${vg_lo_dev}" | grep -q "${vg_name}" ; then
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if ! _find_lo_for_dev "${vg_lo_dev}" | grep -q "${vg_name}" ; then
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sudo losetup "${vg_dev}" "${FILES}/${vg_name}"
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fi
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@ -133,6 +144,12 @@ function _modify_udev_file {
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fi
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}
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function _this_is_the_initial_node {
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[[ -z "$SERVICE_HOST" ||
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"$SERVICE_HOST" == "127.0.0.1" ||
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"$SERVICE_HOST" == "$HOST_IP" ]]
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}
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function configure_drbd_devstack {
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# Configure the service.
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# This gets called before starting the c-vol service; the next callback,
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@ -143,12 +160,18 @@ function configure_drbd_devstack {
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# Initialize and start the service.
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# need to setup loopback device(s) for DRBD
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_drbd_make_vg "${DRBD_DRBDCTRL_VG:?DRBD_DRBDCTRL_VG is not set}" "${DRBD_DRBDCTRL_VG_SZ}" "${DRBD_DRBDCTRL_LODEV}"
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_drbd_make_vg "${DRBD_DRBDCTRL_VG:?DRBD_DRBDCTRL_VG is not set}" \
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"${DRBD_DRBDCTRL_VG_SZ}" "${DRBD_DRBDCTRL_LODEV}"
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# Do the same thing for the DATA volume group
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_drbd_make_vg "${DRBD_DATA_VG:?DRBD_DATA_VG is not set}" "${DRBD_DATA_VG_SZ}" "${DRBD_DATA_LODEV}"
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_drbd_make_vg "${DRBD_DATA_VG:?DRBD_DATA_VG is not set}" \
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"${DRBD_DATA_VG_SZ}" "${DRBD_DATA_LODEV}"
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local vg_size=$(LC_ALL=C sudo vgdisplay --columns --units M \
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--noheadings -o vg_free --nosuffix "${DRBD_DATA_VG}")
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# No quotes, so that the whitespace around the number gets eaten by the shell
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local thinpool_size=$( echo $vg_size \* 30 / 32 - 64 | bc )
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local thinpool_size=$(echo $(LC_ALL=C sudo vgdisplay --columns --units M --noheadings -o vg_free --nosuffix "${DRBD_DATA_VG}") \* 30 / 32 - 64 | bc)
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if ! sudo lvdisplay "${DRBD_DATA_VG}/drbdthinpool" ; then
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sudo /sbin/lvcreate -L "${thinpool_size}"M -T "${DRBD_DATA_VG}/drbdthinpool"
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fi
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@ -175,15 +198,43 @@ function configure_drbd_devstack {
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'ENV{DM_NAME}=="'"${DRBD_DRBDCTRL_VG}"'-.drbdctrl' \
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's:SUBSYSTEM.="block",.*GOTO="\(.*\)":&\nENV{DM_NAME}=="'"${DRBD_DRBDCTRL_VG}"'-.drbdctrl", GOTO="\1"\n:'
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# initialize drbdmanage
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sudo drbdmanage init --quiet
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sudo drbdmanage shutdown --quiet
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# drbdmanage modii: --no-control-volume --no-storage --no-autojoin
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no_stor="${CINDER_DRBD_NO_STORAGE:+--no-storage}"
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# initialize drbdmanage
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if _this_is_the_initial_node ; then
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# No quotes, so that it can expand to an empty string (and get ignored), too.
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sudo drbdmanage init --quiet $no_stor
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else
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# Do we want $HOST_IP, or a possibly different one that should be reachable by the SERVICE_HOST?
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# Is the $SERVICE_HOST always a drbdmanage node, or should we go to $CINDER_SERVICE_HOST?
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# for now some debug output
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set | grep SERVICE_HOST
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local my_address="$HOST_IP"
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if [[ -z "$my_address" ]] ; then
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# Fallback, in case that script gets called standalone.
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my_address="$(ip -oneline route get "$SERVICE_HOST" | \
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grep "$SERVICE_HOST" | awk '/src (.*)/ { print $5 }')"
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fi
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echo "I am from $my_address" # ;)
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no_cv="${CINDER_DRBD_NO_CV:+--no-control-volume}"
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ssh -oBatchMode=yes -oStrictHostKeyChecking=no stack@"$SERVICE_HOST" \
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sudo drbdmanage new-node --no-autojoin "$no_cv" "$no_stor" \
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--quiet "$HOSTNAME" "$my_address"
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ssh -oBatchMode=yes -oStrictHostKeyChecking=no stack@"$SERVICE_HOST" \
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sudo drbdmanage howto-join "$HOSTNAME" --quiet | sudo bash
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fi
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sudo drbdmanage shutdown --quiet
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sudo drbdmanage debug 'set loglevel=debug'
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sudo drbdmanage nodes
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# FIXME: multi-node setups
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iniset $CINDER_CONF "$be_name" volume_backend_name "$be_name"
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iniset $CINDER_CONF "$be_name" volume_driver cinder.volume.drivers.drbdmanagedrv.DrbdManageDriver
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@ -1,4 +1,4 @@
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# Plug-in overrides
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CINDER_ENABLED_BACKENDS=${CINDER_ENABLED_BACKENDS:-drbd:drbd}
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CINDER_ENABLED_BACKENDS=${CINDER_ENABLED_BACKENDS:-drbd:drbdmanage}
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@ -42,4 +42,15 @@ if is_service_enabled drbd-devstack; then
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source "$dir/devstack/lib/drbd_devstack"
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cleanup_drbd_devstack
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fi
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if [[ "$1" == "make-a-storage-node" ]]; then
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# Remove state and transient data
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# Remember clean.sh first calls unstack.sh
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source "$dir/devstack/settings"
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source "$dir/devstack/lib/drbd_devstack"
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pre_install_drbd_devstack
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install_drbd_devstack
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configure_drbd_devstack
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init_drbd_devstack
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fi
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fi
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@ -1,10 +1,10 @@
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# Devstack settings
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FILES="${FILES:-$TOP_DIR/files}"
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FILES="${FILES:-${TOP_DIR:-/tmp}/files}"
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TEMPEST_STORAGE_PROTOCOL=iSCSI
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DRBD_DRBDCTRL_VG_SZ=1G
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DRBD_DRBDCTRL_LODEV=loop66
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DRBD_DRBDCTRL_VG=drbdpool
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DRBD_DATA_VG_SZ="$VOLUME_BACKING_FILE_SIZE"
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DRBD_DATA_VG_SZ="${VOLUME_BACKING_FILE_SIZE:-14000M}"
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DRBD_DATA_VG=drbddata
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DRBD_DATA_LODEV=loop67
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