https://github.com/coreos/etcd%|%etcd%|% is a highly-available key value store for shared configuration and service discovery written in the [Go] language. Together with fleet, it forms the core of the cloud-specific linux distribution called https://coreos.com/%|%CoreOS%|%. A Tcl https://bitbucket.org/enbygg3/biot/src/935c9195c2c1/lib/etcd/?at=master%|%implementation%|% of the https://coreos.com/docs/distributed-configuration/etcd-api/%|%API%|% is available as part of the [biot] project.

[EF] 2015-01-21 An earlier version of this API used `::etcd::set` and `::etcd::get` to set and get keys, which interfered with the regular `set`.  The new version uses a different naming convention, in line with the https://github.com/jplana/python-etcd%|%python API implementation%|%.  The new version also uses more complex semantics for `::etcd::read`, `::etcd::write` and `::etcd::delete`, procedures that are used by most of the remaining procedures.
======
# Create a new connection context (defaults to default port on localhost)
set c [::etcd::new]

# Create a directory, and a sub-directory
::etcd::mkdir $c /onedir
::etcd::mkdir $c /onedir/asubdir

# Create and set a key:
::etcd::write $c /onedir/asubdir/test "Hello World"

# Get back the key
set k [::etcd::read $c /onedir/asubdir/test]

# Remove the key
::etcd::delete $c /onedir/asubdir/test

# Remove the directories, recursively
::etcd::rmdir $c /onedir 1
======

Being completely self-contained, the library will probably move to a new separate location in order to be able to appear in the official list of https://github.com/coreos/etcd/blob/master/Documentation/libraries-and-tools.md%|%language bindings and tools%|%

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