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157 lines
4.7 KiB
Markdown
157 lines
4.7 KiB
Markdown
s3fs
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====
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s3fs allows Linux and Mac OS X to mount an S3 bucket via FUSE.
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s3fs preserves the native object format for files, allowing use of other tools like [s3cmd](http://s3tools.org/s3cmd).
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[](https://travis-ci.org/s3fs-fuse/s3fs-fuse)
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Features
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--------
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* large subset of POSIX including reading/writing files, directories, symlinks, mode, uid/gid, and extended attributes
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* compatible with Amazon S3, Google Cloud Storage, and other S3-based object stores
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* large files via multi-part upload
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* renames via server-side copy
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* optional server-side encryption
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* data integrity via MD5 hashes
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* in-memory metadata caching
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* local disk data caching
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* user-specified regions, including Amazon GovCloud
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* authenticate via v2 or v4 signatures
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Installation
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------------
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* On Linux, ensure you have all the dependencies:
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On Ubuntu 14.04:
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```
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sudo apt-get install automake autotools-dev fuse g++ git libcurl4-openssl-dev libfuse-dev libssl-dev libxml2-dev make pkg-config
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```
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On CentOS 7:
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```
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sudo yum install automake fuse fuse-devel gcc-c++ git libcurl-devel libxml2-devel make openssl-devel
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```
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Then compile from master via the following commands:
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```
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git clone https://github.com/s3fs-fuse/s3fs-fuse.git
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cd s3fs-fuse
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./autogen.sh
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./configure
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make
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sudo make install
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```
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* On Mac OS X, install via [Homebrew](http://brew.sh/):
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```ShellSession
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$ brew cask install osxfuse
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$ brew install s3fs
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```
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Examples
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--------
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The default location for the s3fs password file can be created:
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* using a .passwd-s3fs file in the users home directory (i.e. ~/.passwd-s3fs)
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* using the system-wide /etc/passwd-s3fs file
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Enter your S3 identity and credential in a file `~/.passwd-s3fs` and set
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owner-only permissions:
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```
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echo MYIDENTITY:MYCREDENTIAL > ~/.passwd-s3fs
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chmod 600 ~/.passwd-s3fs
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```
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Run s3fs with an existing bucket `mybucket` and directory `/path/to/mountpoint`:
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```
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s3fs mybucket /path/to/mountpoint -o passwd_file=~/.passwd-s3fs
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```
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If you encounter any errors, enable debug output:
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```
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s3fs mybucket /path/to/mountpoint -o passwd_file=~/.passwd-s3fs -o dbglevel=info -f -o curldbg
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```
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You can also mount on boot by entering the following line to `/etc/fstab`:
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```
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s3fs#mybucket /path/to/mountpoint fuse _netdev,allow_other 0 0
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```
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or
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```
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mybucket /path/to/mountpoint fuse.s3fs _netdev,allow_other 0 0
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```
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If you use s3fs with a non-Amazon S3 implementation, specify the URL and path-style requests:
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```
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s3fs mybucket /path/to/mountpoint -o passwd_file=~/.passwd-s3fs -o url=http://url.to.s3/ -o use_path_request_style
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```
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or(fstab)
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```
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s3fs#mybucket /path/to/mountpoint fuse _netdev,allow_other,use_path_request_style,url=http://url.to.s3/ 0 0
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```
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To use IBM IAM Authentication, use the `-o ibm_iam_auth` option, and specify the Service Instance ID and API Key in your credentials file:
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```
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echo SERVICEINSTANCEID:APIKEY > /path/to/passwd
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```
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The Service Instance ID is only required when using the `-o create_bucket` option.
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Note: You may also want to create the global credential file first
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```
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echo MYIDENTITY:MYCREDENTIAL > /etc/passwd-s3fs
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chmod 600 /etc/passwd-s3fs
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```
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Note2: You may also need to make sure `netfs` service is start on boot
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Limitations
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-----------
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Generally S3 cannot offer the same performance or semantics as a local file system. More specifically:
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* random writes or appends to files require rewriting the entire file
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* metadata operations such as listing directories have poor performance due to network latency
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* [eventual consistency](https://en.wikipedia.org/wiki/Eventual_consistency) can temporarily yield stale data([Amazon S3 Data Consistency Model](http://docs.aws.amazon.com/AmazonS3/latest/dev/Introduction.html#ConsistencyModel))
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* no atomic renames of files or directories
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* no coordination between multiple clients mounting the same bucket
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* no hard links
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References
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----------
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* [goofys](https://github.com/kahing/goofys) - similar to s3fs but has better performance and less POSIX compatibility
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* [s3backer](https://github.com/archiecobbs/s3backer) - mount an S3 bucket as a single file
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* [s3fs-python](https://fedorahosted.org/s3fs/) - an older and less complete implementation written in Python
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* [S3Proxy](https://github.com/andrewgaul/s3proxy) - combine with s3fs to mount EMC Atmos, Microsoft Azure, and OpenStack Swift buckets
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* [s3ql](https://bitbucket.org/nikratio/s3ql/) - similar to s3fs but uses its own object format
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* [YAS3FS](https://github.com/danilop/yas3fs) - similar to s3fs but uses SNS to allow multiple clients to mount a bucket
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Frequently Asked Questions
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--------------------------
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* [FAQ wiki page](https://github.com/s3fs-fuse/s3fs-fuse/wiki/FAQ)
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License
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-------
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Copyright (C) 2010 Randy Rizun <rrizun@gmail.com>
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Licensed under the GNU GPL version 2
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