The standard mflags error reporting produces s.t. like
```
flag provided but not defined: -p
See '/home/weave/weaver --help'.
```
on stderr. This is misleading since the program name is container
local, so not something the user actually invoked.
Fixes#1321.
- 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.
Provides to new two new flags: `--hostname-match <regexp>`
and `--hostname-replacement <replacement>`. When launching a container, its name
matched against regular expression `<regexp>`. Then, based on that match,
`<replacement>` will be used to generate a hostname, which will ultimately be
handed over to weaveDNS for registration.
The substitution is implemented with
https://golang.org/pkg/regexp/#Regexp.ReplaceAllString . Thus, references to
regexp substitution groups should be prepended with a dollar sign.
For instance, if we provide `--hostname-match '^aws-[0-9]+-(.*)$'` and
`--hostname-replacement 'my-app-$1'`, running a container named
`aws-12798186823-foo` through WeaveProxy will lead to WeaveDNS registering
`my-app-foo`.
Closes#1018
Adds a --no-rewrite-hosts flag to the proxy, and be default, removes the
docker IP from hosts. We only discard the docker host when it exists, so
--net=none works.
To allow users to forgo compatibility with Weave Net 1.0 in order to
avoid #912, by setting --protocol-min-version=2.
Defaults to --protocol-min-version=1, i.e. compatible but vulnerable.
Hyphenate words, and always expect double dashes for long options. A
small number of options have entirely new names.
In general I have added aliases for the unhyphenated and single-dashed
varieties, and used mflag's deprecation syntax to make it print a
warning when it sees them. I left some abbreviated options
unhyphenated (e.g., `bufsz`), and the TLS options as-is since they
correspond with Docker options.
NB the deprecation wanrings will mostly get printed to container logs,
since mostly the executables are run in containers. The next step is
to emit warnings from the script for the options mentioned in the
script usage message.
Alfonso Acosta