mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-09-19 15:31:05 +02:00
115 lines
3.2 KiB
ReStructuredText
115 lines
3.2 KiB
ReStructuredText
Use cases
|
|
===================
|
|
|
|
Saving image with different sizes
|
|
#############################
|
|
|
|
Each image usually store one file key in database. However, one image can have several versions, e.g., thumbnail, small, medium, large, original. And each version of the same image will have a file key. It's not ideal to store all the keys.
|
|
|
|
One way to resolve this is here.
|
|
|
|
Reserve a set of file keys, for example, 5
|
|
|
|
.. code-block:: bash
|
|
|
|
curl http://<host>:<port>/dir/assign?count=5
|
|
{"fid":"3,01637037d6","url":"127.0.0.1:8080","publicUrl":"localhost:8080","count":5}
|
|
|
|
Save the 5 versions of the image to the volume server. The urls for each image can be:
|
|
|
|
.. code-block:: bash
|
|
|
|
http://<url>:<port>/3,01637037d6
|
|
http://<url>:<port>/3,01637037d6_1
|
|
http://<url>:<port>/3,01637037d6_2
|
|
http://<url>:<port>/3,01637037d6_3
|
|
http://<url>:<port>/3,01637037d6_4
|
|
|
|
Overwriting mime types
|
|
#############################
|
|
|
|
The correct way to send mime type:
|
|
|
|
|
|
.. code-block:: bash
|
|
|
|
curl -F "file=@myImage.png;type=image/png" http://127.0.0.1:8081/5,2730a7f18b44
|
|
|
|
The wrong way to send it:
|
|
|
|
.. code-block:: bash
|
|
|
|
curl -H "Content-Type:image/png" -F file=@myImage.png http://127.0.0.1:8080/5,2730a7f18b44
|
|
|
|
Securing Seaweed-FS
|
|
#############################
|
|
|
|
The simple way is to front all master and volume servers with firewall.
|
|
|
|
However, if blocking servicing port is not feasible or trivial, a white list option can be used. Only traffic from the white list IP addresses have write permission.
|
|
|
|
.. code-block:: bash
|
|
|
|
weed master -whiteList="::1,127.0.0.1"
|
|
weed volume -whiteList="::1,127.0.0.1"
|
|
# "::1" is for IP v6 localhost.
|
|
|
|
|
|
Data Migration Example
|
|
#############################
|
|
|
|
.. code-block:: bash
|
|
|
|
weed master -mdir="/tmp/mdata" -defaultReplication="001" -ip="localhost" -port=9334
|
|
weed volume -dir=/tmp/vol1/ -mserver="localhost:9334" -ip="localhost" -port=8081
|
|
weed volume -dir=/tmp/vol2/ -mserver="localhost:9334" -ip="localhost" -port=8082
|
|
weed volume -dir=/tmp/vol3/ -mserver="localhost:9334" -ip="localhost" -port=8083
|
|
|
|
.. code-block:: bash
|
|
|
|
ls vol1 vol2 vol3
|
|
vol1:
|
|
1.dat 1.idx 2.dat 2.idx 3.dat 3.idx 5.dat 5.idx
|
|
vol2:
|
|
2.dat 2.idx 3.dat 3.idx 4.dat 4.idx 6.dat 6.idx
|
|
vol3:
|
|
1.dat 1.idx 4.dat 4.idx 5.dat 5.idx 6.dat 6.idx
|
|
|
|
stop all of them
|
|
|
|
move vol3/* to vol1 and vol2
|
|
|
|
it is ok to move x.dat and x.idx from one volumeserver to another volumeserver,
|
|
because they are exactly the same.
|
|
it can be checked by md5.
|
|
|
|
.. code-block:: bash
|
|
|
|
md5 vol1/1.dat vol2/1.dat
|
|
MD5 (vol1/1.dat) = c1a49a0ee550b44fef9f8ae9e55215c7
|
|
MD5 (vol2/1.dat) = c1a49a0ee550b44fef9f8ae9e55215c7
|
|
md5 vol1/1.idx vol2/1.idx
|
|
MD5 (vol1/1.idx) = b9edc95795dfb3b0f9063c9cc9ba8095
|
|
MD5 (vol2/1.idx) = b9edc95795dfb3b0f9063c9cc9ba8095
|
|
|
|
.. code-block:: bash
|
|
|
|
ls vol1 vol2 vol3
|
|
vol1:
|
|
1.dat 1.idx 2.dat 2.idx 3.dat 3.idx 4.dat 4.idx 5.dat 5.idx 6.dat 6.idx
|
|
vol2:
|
|
1.dat 1.idx 2.dat 2.idx 3.dat 3.idx 4.dat 4.idx 5.dat 5.idx 6.dat 6.idx
|
|
vol3:
|
|
|
|
start
|
|
|
|
.. code-block:: bash
|
|
|
|
weed master -mdir="/tmp/mdata" -defaultReplication="001" -ip="localhost" -port=9334
|
|
weed volume -dir=/tmp/vol1/ -mserver="localhost:9334" -ip="localhost" -port=8081
|
|
weed volume -dir=/tmp/vol2/ -mserver="localhost:9334" -ip="localhost" -port=8082
|
|
|
|
so we finished moving data of localhost:8083 to localhost:8081/localhost:8082
|
|
|
|
|