* master: (71 commits)
Fix output of 'nomad deployment fail' with no arg
Always create a running allocation when testing task state
tests: ensure exec tests pass valid task resources (#4992)
some changes for more idiomatic code
fix iops related tests
fixed bug in loop delay
gofmt
improved code for readability
client: updateAlloc release lock after read
fixup! device attributes in `nomad node status -verbose`
drivers/exec: support device binds and mounts
fix iops bug and increase test matrix coverage
tests: tag image explicitly
changelog
ci: install lxc-templates explicitly
tests: skip checking rdma cgroup
ci: use Ubuntu 16.04 (Xenial) in TravisCI
client: update driver info on new fingerprint
drivers/docker: enforce volumes.enabled (#4983)
client: Style: use fluent style for building loggers
...
Currently, there is a race condition between creating a taskrunner, and
updating node attributes via fingerprinting.
This is because the taskenv builder will try to iterate over the
clientconfig.Node.Attributes map, which can be concurrently updated by
the fingerprinting process, thus causing a panic.
This fixes that by providing a copy of the clientconfg to the
allocrunner inside the Read lock during config creation.
Prior to 97f33bb1537d04905cb84199672bcdf46ebb4e65, executor cgroup validation errors were
silently ignored. Enforcing them reveals test cases that missed them.
This doesn't change customer facing contract, as resource struct is
is either configured or we default to 100 (much higher than 2).
The allocLock is used to synchronize access to the alloc runner map, not
to ensure internal consistency of the alloc runners themselves. This
updates the updateAlloc process to avoid hanging on to an exclusive lock
of the map while applying changes to allocrunners themselves, as they
should be internally consistent.
This fixes a bug where any client allocation api will block during the
shutdown or updating of an allocrunner and its child taskrunners.
Fixes a bug where a driver health and attributes are never updated from
their initial status. If a driver started unhealthy, it may never go
into a healthy status.
