mirror of
https://github.com/linuxkit/linuxkit.git
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129f7836fd
We detect Hyper-V by the presence of /sys/bus/vmbus and then run the /sbin/9pmount-vsock command to establish a socket connection and then pass the fd to /bin/mount This patch also hard-codes the database directory com.docker.driver.amd64-linux since we can't use the kernel commandline on Hyper-V hosts. It would probably be better to expose a generic directory name ( / ?) on all platforms and configure the datbase to store each VM's configuration in a different directory. Signed-off-by: David Scott <dave.scott@docker.com>
105 lines
2.0 KiB
Bash
Executable File
105 lines
2.0 KiB
Bash
Executable File
#!/bin/sh
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if [ $# -ne 2 ]
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then
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printf "usage: $0 [get|exists|watch|path|dir|find] key\n"
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exit 0
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fi
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if [ $1 == "set" ]
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then
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printf "Configuration is immutable\n" 1>&2
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exit 1
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fi
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if [ ! -d /Database ]
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then
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mkdir -p /Database
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if [ -d /sys/bus/vmbus ]; then
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# Running on a Hyper-V hypervisor
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/sbin/9pmount-vsock listen db /Database
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else
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mount -t 9p -o trans=virtio,dfltuid=1001,dfltgid=50,version=9p2000 db /Database
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fi
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if [ $? -ne 0 ]
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then
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rm -rf /Database
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printf "Could not mount configuration database\n" 1>&2
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exit 1
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fi
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fi
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DATABASE="com.docker.driver.amd64-linux"
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BASE="/Database/branch/master/ro/${DATABASE}"
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KEY=$(echo $2 | sed 's@^/@@')
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if [ $1 == "exists" ]
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then
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[ -d ${BASE}/${KEY} ] && exit 0
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[ -f ${BASE}/${KEY} ] || exit 1
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VALUE="$(cat ${BASE}/${KEY} | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')"
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[ -z "${VALUE}" ] && exit 1
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exit 0
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fi
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if [ $1 == "dir" ]
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then
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[ -d ${BASE}/${KEY} ] && exit 0 || exit 1
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fi
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if [ $1 == "get" ]
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then
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if [ -f ${BASE}/${KEY} ]
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then
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cat ${BASE}/${KEY}
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exit 0
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else
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printf "No such key: ${KEY}\n" 1>&2
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exit 1
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fi
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fi
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if [ $1 == "path" ]
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then
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if [ -e ${BASE}/${KEY} ]
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then
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printf ${BASE}/${KEY}
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exit 0
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else
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printf "No such key: ${KEY}\n" 1>&2
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exit 1
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fi
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fi
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if [ $1 == "find" ]
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then
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if [ -e ${BASE}/${KEY} ]
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then
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find ${BASE}/${KEY} -type f | sed "s@^${BASE}@@g"
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exit 0
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else
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printf "No such key: ${KEY}\n" 1>&2
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exit 1
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fi
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fi
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# might be nicer if watch returned a file descriptor not a path
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# /Database/branch/master/watch/com.docker.driver.amd64-linux.node/etc.node/docker.node/daemon.json.node/tree.live
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if [ $1 == "watch" ]
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then
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WATCHBASE="/Database/branch/master/watch/${DATABASE}.node"
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WATCH="${WATCHBASE}/$(echo ${KEY} | sed 's@/@.node/@g').node/tree.live"
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if [ -f ${WATCH} ]
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then
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printf ${WATCH}
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exit 0
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else
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printf "No such watch: ${WATCH}\n" 2>&1
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exit 1
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fi
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fi
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printf "usage: $0 [get|exists|watch|path|dir|find] key\n"
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exit 1
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