mirror of https://github.com/k3s-io/k3s
73 lines
2.3 KiB
Bash
Executable File
73 lines
2.3 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Copyright 2018 The Kubernetes Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# This script does not run any daemon, it only configures iSCSI target (=server)
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# in kernel. It is possible to run this script multiple times on a single
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# node, each run will create its own IQN and LUN.
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# Kubernetes must provide unique name.
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IQN=$1
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# targetcli synchronizes over dbus, however it does not work in
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# containers. Use flock instead
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LOCK=/srv/iscsi/targetcli.lock
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function start()
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{
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# targetcli need dbus. It may not run on the host, so start a private one
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mkdir /run/dbus
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dbus-daemon --system
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# Create new IQN (iSCSI Qualified Name)
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flock $LOCK targetcli /iscsi create "$IQN"
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# Run it in demo mode, i.e. no authentication
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flock $LOCK targetcli /iscsi/"$IQN"/tpg1 set attribute authentication=0 demo_mode_write_protect=0 generate_node_acls=1 cache_dynamic_acls=1
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# Create unique "block volume" (i.e. flat file) on the *host*.
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# Having it in the container confuses kernel from some reason
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# and it's not able to server multiple LUNs from different
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# containers.
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# /srv/iscsi must be bind-mount from the host.
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cp /block /srv/iscsi/"$IQN"
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# Make the block volume available through our IQN as LUN 0
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flock $LOCK targetcli /backstores/fileio create block-"$IQN" /srv/iscsi/"$IQN"
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flock $LOCK targetcli /iscsi/"$IQN"/tpg1/luns create /backstores/fileio/block-"$IQN"
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echo "iscsi target started"
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}
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function stop()
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{
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echo "stopping iscsi target"
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# Remove IQN
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flock $LOCK targetcli /iscsi/"$IQN"/tpg1/luns/ delete 0
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flock $LOCK targetcli /iscsi delete "$IQN"
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# Remove block device mapping
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flock $LOCK targetcli /backstores/fileio delete block-"$IQN"
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/bin/rm -f /srv/iscsi/"$IQN"
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echo "iscsi target stopped"
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exit 0
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}
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trap stop TERM
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start
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while true; do
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sleep 1
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done
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