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Introduce image names and metadata storage in etcd

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Each inode has: image name, parent inode number & pool, size and readonly flag

Snapshots are created by switching image name to a different inode number
while using the older inode as parent.
This commit is contained in:
Vitaliy Filippov
2021-04-10 17:44:12 +03:00
parent ab39ce2bbb
commit 2612d3198a
9 changed files with 301 additions and 70 deletions
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tests/test_snapshot.sh
+14 -10
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@@ -38,14 +38,18 @@ fi
# Test basic write and snapshot
LD_PRELOAD=libasan.so.5 \
fio -thread -name=test -ioengine=build/src/libfio_vitastor.so -bs=4M -direct=1 -iodepth=1 -fsync=1 -rw=write -etcd=$ETCD_URL -pool=1 -inode=2 -size=32M -cluster_log_level=10
$ETCDCTL put /vitastor/config/inode/1/2 '{"name":"testimg@0"}'
$ETCDCTL put /vitastor/config/inode/1/3 '{"parent_id":2,"name":"testimg"}'
$ETCDCTL put /vitastor/config/inode/1/2 '{"name":"testimg","size":'$((32*1024*1024))'}'
LD_PRELOAD=libasan.so.5 \
fio -thread -name=test -ioengine=build/src/libfio_vitastor.so -bs=4k -direct=1 -iodepth=1 -fsync=32 -buffer_pattern=0xdeadface -rw=randwrite -etcd=$ETCD_URL -pool=1 -inode=3 -size=32M -number_ios=1024
fio -thread -name=test -ioengine=build/src/libfio_vitastor.so -bs=4M -direct=1 -iodepth=1 -fsync=1 -rw=write \
-etcd=$ETCD_URL -pool=1 -inode=2 -size=32M -cluster_log_level=10
$ETCDCTL put /vitastor/config/inode/1/2 '{"name":"testimg@0","size":'$((32*1024*1024))'}'
$ETCDCTL put /vitastor/config/inode/1/3 '{"parent_id":2,"name":"testimg","size":'$((32*1024*1024))'}'
LD_PRELOAD=libasan.so.5 \
fio -thread -name=test -ioengine=build/src/libfio_vitastor.so -bs=4k -direct=1 -iodepth=1 -fsync=32 -buffer_pattern=0xdeadface \
-rw=randwrite -etcd=$ETCD_URL -image=testimg -number_ios=1024
LD_PRELOAD=libasan.so.5 \
fio -thread -name=test -ioengine=build/src/libfio_vitastor.so -bs=4M -direct=1 -iodepth=1 -rw=read -etcd=$ETCD_URL -pool=1 -inode=3 -size=32M
@@ -55,14 +59,14 @@ qemu-img convert -S 4096 -p \
-O raw ./testdata/merged.bin
qemu-img convert -S 4096 -p \
-f raw "vitastor:etcd_host=127.0.0.1\:$ETCD_PORT/v3:pool=1:inode=2:size=$((32*1024*1024))" \
-f raw "vitastor:etcd_host=127.0.0.1\:$ETCD_PORT/v3:image=testimg@0" \
-O raw ./testdata/layer0.bin
$ETCDCTL put /vitastor/config/inode/1/3 '{"name":"testimg"}'
$ETCDCTL put /vitastor/config/inode/1/3 '{"name":"testimg","size":'$((32*1024*1024))'}'
qemu-img convert -S 4096 -p \
-f raw "vitastor:etcd_host=127.0.0.1\:$ETCD_PORT/v3:pool=1:inode=3:size=$((32*1024*1024))" \
-O raw ./testdata/layer1.bin
-f raw "vitastor:etcd_host=127.0.0.1\:$ETCD_PORT/v3:image=testimg" \
-O raw ./testdata/layer1.bin
node mon/merge.js ./testdata/layer0.bin ./testdata/layer1.bin ./testdata/check.bin