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Nomad 0.9.0 changelog
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## 0.9.0 (Unreleased)

__BACKWARDS INCOMPATIBILITIES:__
* core: Switch to structured logging using [go-hclog](https://github.com/hashicorp/go-hclog)
* core: IOPS as a resource is now deprecated [[GH-4970](https://github.com/hashicorp/nomad/issues/4970)]

* core: Switch to structured logging using
[go-hclog](https://github.com/hashicorp/go-hclog). If you have tooling that
parses Nomad's logs, the format of logs has changed and your tools may need
updating.
* core: IOPS as a resource is now deprecated
[[GH-4970](https://github.com/hashicorp/nomad/issues/4970)]. Nomad continues
to parse IOPS in job's to allow job authors time to remove iops from their
jobs.
* core: Allow the != constraint to match against keys that do not exist [[GH-4875](https://github.com/hashicorp/nomad/pull/4875)]
* client: Task config interpolation requires names to be valid identifiers
(`node.region` or `NOMAD_DC`). Interpolating other variables requires a new
indexing syntax: `env[".invalid.identifier."]`. [[GH-4843](https://github.com/hashicorp/nomad/issues/4843)]
* client: Node metadata variables must have valid identifiers, whether
specified in the config file (`client.meta` stanza) or on the command line
(`-meta`). [[GH-5158](https://github.com/hashicorp/nomad/pull/5158)]
* driver/lxc: The LXC driver is no longer packaged with Nomad and is instead
distributed separately as a driver plugin. Further, the LXC driver codebase
is now in a separate
[repository](https://github.com/hashicorp/nomad-driver-lxc). If you are using
LXC, please follow the 0.9.0 upgrade guide as you will have to install the
LXC driver before conducting an in-place upgrade to Nomad 0.9.0 [[GH-5162](https://github.com/hashicorp/nomad/issues/5162)]

FEATURES:

* **Affinities and Spread**: Jobs may now specify affinities towards certain
node attributes. Affinities act as soft constraints, and inform the scheduler
that a preference for certain node properties exists. The new spread stanza
informs the scheduler that allocations should be spread across a specific
property such as datacenter or availability zone. This is useful to increase
failure tolerance of critical applications.
* **System Job Preemption**: System jobs may now preempt lower priority
allocations. The ability to place system jobs on all targeted nodes is
critical since system jobs often run applications that provide services for
all allocations on the node.
* **Driver Plugins**: Nomad now supports task drivers as plugins. Driver
plugins operate the same as built-in drivers and can be developed and
distributed independently from Nomad.
* **Device Plugins**: Nomad now supports scheduling and mounting devices via
device plugins. Device plugins expose hardware devices such as GPUs to Nomad
and instruct the client on how to make them available to tasks. Device
plugins can expose the health of devices, the devices attributes, and device
usage statistics. Device plugins can be developed and distributed
independently from Nomad.
* **Nvidia GPU Device Plugin**: Nomad builds-in a Nvidia GPU device plugin to
add out of the box support for scheduling Nvidia GPUs.
* **Client Refactor**: Major focus has been put in this release to refactor the
Nomad Client codebase. The goal of the refactor has been to make the
codebase more modular to increase developer velocity and testability.
* **Mobile UI Views:** The side-bar navigation, breadcrumbs, and various other page
elements are now responsively resized and repositioned based on your browser size.
* **Job Authoring from the UI:** It is now possible to plan and submit new jobs, edit
existing jobs, stop and start jobs, and promote canaries all from the UI.
* **Improved Stat Tracking in UI:** The client detail, allocation detail, and task
detail pages now have line charts that plot CPU and Memory usage changes over time.
* **Structured Logging**: Nomad now uses structured logging with the ability to
output logs in a JSON format.

IMPROVEMENTS:

* core: Added advertise address to client node meta data [[GH-4390](https://github.com/hashicorp/nomad/issues/4390)]
* core: Added support for specifying node affinities. Affinities allow job operators to specify weighted placement preferences
according to different node attributes [[GH-4512](https://github.com/hashicorp/nomad/issues/4512)]
* core: Added support for spreading allocations across a specific attribute. Operators can specify spread
target percentages across failure domains such as datacenter or rack [[GH-4512](https://github.com/hashicorp/nomad/issues/4512)]
* core: Added support for specifying node affinities. Affinities allow job operators to specify weighted placement preferences according to different node attributes [[GH-4512](https://github.com/hashicorp/nomad/issues/4512)]
* core: Added support for spreading allocations across a specific attribute. Operators can specify spread target percentages across failure domains such as datacenter or rack [[GH-4512](https://github.com/hashicorp/nomad/issues/4512)]
* core: Added preemption support for system jobs. System jobs can now preempt other jobs of lower priority. See [preemption](https://www.nomadproject.io/docs/internals/scheduling/preemption.html) for more details. [[GH-4794](https://github.com/hashicorp/nomad/pull/4794)]
* acls: Allow support for using globs in namespace definitions [[GH-4982](https://github.com/hashicorp/nomad/pull/4982)]
* agent: Support JSON log output [[GH-5173](https://github.com/hashicorp/nomad/issues/5173)]
* api: Reduced api package dependencies [[GH-5213](https://github.com/hashicorp/nomad/pull/5213)]
* client: Added service metadata tag that enables the Consul UI to show a Nomad
icon for services registered by Nomad [[GH-4889](https://github.com/hashicorp/nomad/issues/4889)]
* client: Refactor client to support plugins and improve state handling [[GH-4792](https://github.com/hashicorp/nomad/pull/4792)]
* client: Extend timeout to 60 seconds for Windows CPU fingerprinting [[GH-4441](https://github.com/hashicorp/nomad/pull/4441)]
* client: Refactor client to support plugins and improve state handling [[GH-4792](https://github.com/hashicorp/nomad/pull/4792)]
* client: Updated consul-template library to pick up recent fixes and improvements[[GH-4885](https://github.com/hashicorp/nomad/pull/4885)]
* driver/docker: Report container images with user friendly name rather than underlying image ID [[GH-4926](https://github.com/hashicorp/nomad/pull/4926)]
* client: Added service metadata tag that enables the Consul UI to show a Nomad icon for services registered by Nomad [[GH-4889](https://github.com/hashicorp/nomad/issues/4889)]
* driver/docker: Support logs when using Docker for Mac [[GH-4758](https://github.com/hashicorp/nomad/issues/4758)]
* driver/docker: Added support for specifying `storage_opt` in the Docker driver [[GH-4908](https://github.com/hashicorp/nomad/pull/4908)]
* driver/docker: Added support for specifying `cpu_cfs_period` in the Docker driver [[GH-4462](https://github.com/hashicorp/nomad/pull/4462)]
* driver/docker: Added support for setting bind and tmpfs mounts in the Docker driver [[GH-4924](https://github.com/hashicorp/nomad/pull/4924)]
* driver/docker: Report container images with user friendly name rather than underlying image ID [[GH-4926](https://github.com/hashicorp/nomad/pull/4926)]
* drivers: Added total memory usage to task resource metrics [[GH-5190](https://github.com/hashicorp/nomad/pull/5190)]
* server/rpc: Reduce logging when undergoing temporary network errors such as hitting file descriptor limits [[GH-4974](https://github.com/hashicorp/nomad/issues/4974)]
* server/vault: Tweaked logs to better identify vault connection errors [[GH-5228](https://github.com/hashicorp/nomad/pull/5228)]
* server/vault: Added Vault token expiry info in `nomad status` CLI, and some improvements to token refresh process [[GH-4817](https://github.com/hashicorp/nomad/pull/4817)]
* telemetry: All client metrics include a new `node_class` tag [[GH-3882](https://github.com/hashicorp/nomad/issues/3882)]
* telemetry: Added new tags with value of child job id and parent job id for
parameterized and periodic jobs [[GH-4392](https://github.com/hashicorp/nomad/issues/4392)]
* ui: CPU and Memory metrics are plotted over time during a session in line charts on node detail, allocation detail, and task detail pages [[GH-4661](https://github.com/hashicorp/nomad/issues/4661)], [[GH-4718](https://github.com/hashicorp/nomad/issues/4718)], [[GH-4727](https://github.com/hashicorp/nomad/issues/4727)]
* ui: Switching namespaces in the UI will now always "reset" back to the jobs list page [[GH-4533](https://github.com/hashicorp/nomad/issues/4533)]
* ui: Refactored breadcrumbs and adjusted the breadcrumb paths on each page [[GH-4458](https://github.com/hashicorp/nomad/issues/4458)]
* ui: Jobs can be authored, planned, submitted, and edited from the UI [[GH-4600](https://github.com/hashicorp/nomad/issues/4600)]
* ui: Added links to Jobs and Clients from the error page template [[GH-4850](https://github.com/hashicorp/nomad/issues/4850)]
* ui: Gracefully handle errors from the stats end points [[GH-4833](https://github.com/hashicorp/nomad/issues/4833)]
* ui: Stopped jobs can be restarted from the UI [[GH-4615](https://github.com/hashicorp/nomad/issues/4615)]
* ui: Canaries can now be promoted from the UI [[GH-4616](https://github.com/hashicorp/nomad/issues/4616)]
* telemetry: Added new tags with value of child job id and parent job id for parameterized and periodic jobs [[GH-4392](https://github.com/hashicorp/nomad/issues/4392)]
* ui: Improved JSON editor [[GH-4541](https://github.com/hashicorp/nomad/issues/4541)]
* ui: Mobile friendly views [[GH-4536](https://github.com/hashicorp/nomad/issues/4536)]
* ui: Filled out the styleguide [[GH-4468](https://github.com/hashicorp/nomad/issues/4468)]
* vendor: Removed library obsoleted by go 1.8 [[GH-4469](https://github.com/hashicorp/nomad/issues/4469)]
* acls: Allow support for using globs in namespace definitions [[GH-4982](https://github.com/hashicorp/nomad/pull/4982)]
* ui: Support switching regions [[GH-4572](https://github.com/hashicorp/nomad/issues/4572)]
* ui: Canaries can now be promoted from the UI [[GH-4616](https://github.com/hashicorp/nomad/issues/4616)]
* ui: Stopped jobs can be restarted from the UI [[GH-4615](https://github.com/hashicorp/nomad/issues/4615)]
* ui: Gracefully handle errors from the stats end points [[GH-4833](https://github.com/hashicorp/nomad/issues/4833)]
* ui: Added links to Jobs and Clients from the error page template [[GH-4850](https://github.com/hashicorp/nomad/issues/4850)]
* ui: Jobs can be authored, planned, submitted, and edited from the UI [[GH-4600](https://github.com/hashicorp/nomad/issues/4600)]
* ui: Display recent allocations on job page and introduce allocation tab [[GH-4529](https://github.com/hashicorp/nomad/issues/4529)]
* ui: Refactored breadcrumbs and adjusted the breadcrumb paths on each page [[GH-4458](https://github.com/hashicorp/nomad/issues/4458)]
* ui: Switching namespaces in the UI will now always "reset" back to the jobs list page [[GH-4533](https://github.com/hashicorp/nomad/issues/4533)]
* ui: CPU and Memory metrics are plotted over time during a session in line charts on node detail, allocation detail, and task detail pages [[GH-4661](https://github.com/hashicorp/nomad/issues/4661)], [[GH-4718](https://github.com/hashicorp/nomad/issues/4718)], [[GH-4727](https://github.com/hashicorp/nomad/issues/4727)]

BUG FIXES:

* core: Removed some GPL code inadvertently added for macOS support [[GH-5202](https://github.com/hashicorp/nomad/pull/5202)]
* core: Fix an issue where artifact checksums containing interpolated variables failed validation [[GH-4810](https://github.com/hashicorp/nomad/pull/4819)]
* core: Fix an issue where job summaries for parent dispatch/periodic jobs were not being computed correctly [[GH-5205](https://github.com/hashicorp/nomad/pull/5205)]
Expand All @@ -56,14 +107,16 @@ BUG FIXES:
* driver/docker: Fix a path traversal issue where mounting paths outside alloc dir might be possible despite `docker.volumes.enabled` set to false [[GH-4983](https://github.com/hashicorp/nomad/pull/4983)]
* driver/raw_exec: Fix an issue where tasks that used an interpolated command in driver configuration would not start [[GH-4813](https://github.com/hashicorp/nomad/pull/4813)]
* quota: Fixed a bug in Nomad enterprise where quota specifications were not being replicated to non authoritative regions correctly.
* scheduler: Allow schedulers to handle evaluations that are created due to previous evaluation failures [[GH-4712](https://github.com/hashicorp/nomad/issues/4712)]
* server/vault: Fixed bug in Vault token renewal that could panic on a malformed Vault response [[GH-4904](https://github.com/hashicorp/nomad/issues/4904)], [[GH-4937](https://github.com/hashicorp/nomad/pull/4937)]
* template: Fix parsing of environment templates when destination path is
interpolated [[GH-5253](https://github.com/hashicorp/nomad/issues/5253)]
* ui: Fixed an issue where distribution bar corners weren't rounded when there was only one or two slices in the chart [[GH-4507](https://github.com/hashicorp/nomad/issues/4507)]
* ui: Fixed an issue where dispatched jobs would get the wrong template type which could cause runtime errors [[GH-4852](https://github.com/hashicorp/nomad/issues/4852)]
* ui: Added an empty state for the tasks list on the allocation detail page, for when an alloc has no tasks [[GH-4860](https://github.com/hashicorp/nomad/issues/4860)]
* ui: Fixed an issue where the task group breadcrumb didn't always include the namesapce query param [[GH-4801](https://github.com/hashicorp/nomad/issues/4801)]
* template: Fix parsing of environment templates when destination path is interpolated [[GH-5253](https://github.com/hashicorp/nomad/issues/5253)]
* ui: Fixes for viewing objects that contain dots in their names [[GH-4994](https://github.com/hashicorp/nomad/issues/4994)]
* ui: Correctly labeled certain classes of unknown errors as 404 errors [[GH-4841](https://github.com/hashicorp/nomad/issues/4841)]
* ui: Fixed an issue where searching while viewing a paginated table could display no results [[GH-4822](https://github.com/hashicorp/nomad/issues/4822)]
* ui: Fixed an issue where the task group breadcrumb didn't always include the namesapce query param [[GH-4801](https://github.com/hashicorp/nomad/issues/4801)]
* ui: Added an empty state for the tasks list on the allocation detail page, for when an alloc has no tasks [[GH-4860](https://github.com/hashicorp/nomad/issues/4860)]
* ui: Fixed an issue where dispatched jobs would get the wrong template type which could cause runtime errors [[GH-4852](https://github.com/hashicorp/nomad/issues/4852)]
* ui: Fixed an issue where distribution bar corners weren't rounded when there was only one or two slices in the chart [[GH-4507](https://github.com/hashicorp/nomad/issues/4507)]

## 0.8.7 (January 14, 2019)

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