- Nameserver holds a sorted list of (hostname, peer, container id, ip) tuples.
- Entries are gossiped using topology gossip / broadcast - only new/updated entries
are propogated as expected.
- Entries for a given peer are removed when the connection to the peer is lost.
- Entries are tombstoned when containers die. Tombstones are kept for 10mins,
as they do not need to survive partition, only gossip propagation delay.
- units.sh should exit on error.
- Add race detector to unit test runner.
- Use local testing/cover/cover tool in gen_coverage_report.sh and units.sh
- Use the scheduler to parallelise the unit tests.
- Make test run id a string and differentiate between unit runs and integration runs in the scheduler.
- Pipe circle env vars through to build container so we can detect when to use the scheduler
- Add python requests to the weave build container.
- Quote test names in urls, make flask handle url segments with slashes in.
Caveats:
* TLS files must be present on the target server (and readable)
* TLS file paths cannot contain spaces
* TLS file paths must be absolute (i.e. cannot be relative)
* Bash argument parsing is terrible
This adds a docker remote API proxy to the weaveexec image. The proxy
has hooks for (post-) container start and (pre-) container create; the
former attaches a weave interface to a container given a WEAVE_CIDR
environment entry, and the latter adjusts the entrypoint of a container
to wait for the ethwe interface.
Notes:
None of the hooks need to inspect/change large bodies. In order to avoid
a crash when handling images larger than memory we need to ensure that
the entire request body is never loaded into memory (i.e. No
ioutils.ReadAll).
When proxying a raw-stream response, we can't use http.WriteHeader. It
sets the Transfer-Encoding to chunked, which will throw off the clients.
Instead we have to hijack the socket, and write out http status code
manually.
For chunked transfer-encodings, clients (docker-py) depend on each http
chunk containing exactly one JSON object. Therefore, we cannot re-chunk
the body, and have to pass it across verbatim.
Proxy needs to pass multi-cidrs separately when calling weave. Otherwise
they get smashed together on the command line, and the call fails.
When creating the image, if no entrypoint is specified on the container,
it should use the entrypoint of the image. Code for this is based on
powerstrip-weave.
We handle WEAVE_CIDR='' by acting like it is not set. The reason being,
that because WEAVE_CIDR is inherited from images (along with env vars),
setting it to blank is equivalent to unsetting it.
Using the Ring CRDT and Weave gossip, provides an interface
for the weave script to allocate IP addresses in `weave run`,
`weave start` and `weave expose`.
See docs/ipam.md for implementation details, and site/features.md
for user-visible changes.
Matthias Radestock