The syslog logging system depends on the ability for a unix socket to be
accessed by the docker daemon in the $TMPDIR of the host. This doesn't
work on Docker For Mac because the docker daemon is running inside a VM,
and while /tmp is accessible, the filesystem used to share them doesn't
support unix socket files, and thus it doesn't work.
* In -dev mode, `ioutil.TempDir` is used for the alloc and state
directories.
* `TempDir` uses `$TMPDIR`, which os OS X contains a per user
directory which is under `/var/folder`.
* `/var` is actually a symlink to `/private/var`
* Docker For Mac validates the directories that are passed to bind and on
OS X. That whitelist contains `/private`, but not `/var`. It does not
expand the path, and so any paths in `$TMPDIR` fail the whitelist check.
And thusly, by expanding the alloc/state directories the value passed
for binding does contain `/private` and Docker For Mac is happy.
Before this commit, if the Logging config did not contain a logging option "syslog-address", it would definitely insert this option.
If then, you decide to take another logdriver than syslog, docker would fail because it received a wrong log option for the selected driver.
Now, nomad will only insert the syslog address in a hard way if there are no logging options at all - this way it keeps the default nomad settings.
Furthermore, I added support for volumes-from.
Currently, there is no support to move the data from one container to another, hence: If a container spawns on another host, it is very likely, that the data will not be found.
* Added the alloc dir move
* Moving allocdirs when starting allocations
* Added the migrate flag to ephemeral disk
* Stopping migration if the allocation doesn't need migration any more
* Added the GetAllocDir method
* refactored code
* Added a test for alloc runner
* Incorporated review comments
Remove use of periodic consul handlers in the client and just use
goroutines. Consul Discovery is now triggered with a chan instead of
using a timer and deadline to trigger.
Once discovery is complete a chan is ticked so all goroutines waiting
for servers will run.
Should speed up bootstraping and recovery while decreasing spinning on
timers.
rpcproxy is refactored into serverlist which prioritizes good servers
over servers in a remote DC or who have had a failure.
Registration, heartbeating, and alloc status updating will retry faster
when new servers are discovered.
Consul discovery will be retried more quickly when no servers are
available (eg on startup or an outage).
Evan Phoenix