## 0.5.0 (Unreleased)

FEATURES:

 * Key rotation support for gossip layer. This allows the `encrypt` key
   to be changed globally.  See "keyring" command. [GH-336]
 * Options to join the WAN pool on start (`start_join_wan`, `retry_join_wan`) [GH-477]
 * Optional HTTPS interface [GH-478]
 * Ephemeral keys via "delete" session behavior. This allows keys to be deleted when
   a session is invalidated instead of having the lock released. Adds new "Behavior"
   field to Session which is configurable. [GH-487]
 * Reverse DNS lookups via PTR for IPv4 and IPv6 [GH-475]
 * API added checks and services are persisted. This means services and
   checks will survive a crash or restart. [GH-497]
 * ACLs can now protect service registration. Users in blacklist mode should
   allow registrations before upgrading to prevent a service disruption. [GH-506] [GH-465]
 * Sessions support a heartbeat failure detector via use of TTLs. This adds a new
   "TTL" field to Sessions and a `/v1/session/renew` endpoint. Heartbeats act like a
   failure detector (health check), but are managed by the servers. [GH-524] [GH-172]
 * Support for service specific IP addresses. This allows the service to advertise an
   address that is different from the agent. [GH-229] [GH-570]
 * Support KV Delete with Check-And-Set  [GH-589]
 * Merge `armon/consul-api` into `api` as official Go client.
 * Support for distributed locks and semaphores in API client [GH-594] [GH-600]
 * Support for native HTTP health checks [GH-592]
 * Support for node and service maintanence modes [GH-606]
 * Added new "consul maint" command to easily toggle maintanence modes [GH-625]
 * Added new "consul lock" command for simple highly-available deployments.
   This lets Consul manage the leader election and easily handle N+1 deployments
   without the applications being Consul aware. [GH-619]
 * Multiple checks can be associated with a service [GH-591] [GH-230]

BUG FIXES:

 * Fixed X-Consul-Index calculation for KV ListKeys
 * Fixed errors under extremely high read parallelism
 * Fixed issue causing event watches to not fire reliably [GH-479]
 * Fixed non-monotonic X-Consul-Index with key deletion [GH-577] [GH-195]
 * Fixed use of default instead of custom TLD in some DNS responses [GH-582]
 * Fixed memory leaks in API client when an error response is returned [GH-608]
 * Fixed issues with graceful leave in single-node bootstrap cluster [GH-621]
 * Fixed issue preventing node reaping [GH-371]
 * Fixed gossip stability at very large scale

IMPROVEMENTS:

 * Support "consul exec" in foreign datacenter [GH-584]
 * Improved K/V blocking query performance [GH-578]
 * CLI respects CONSUL_RPC_ADDR environment variable to load parameter [GH-542]
 * Added support for multiple DNS recursors [GH-448]
 * Added support for definining multiple services per configuration file [GH-433]
 * Added support for definining multiple checks per configuration file [GH-433]
 * Allow mixing of service and check definitions in a configuration file [GH-433]
 * Allow notes for checks in service definition file [GH-449]
 * Random stagger for agent checks to prevent thundering herd [GH-546]
 * More useful metrics are sent to statsd/statsite
 * Added configuration to set custom HTTP headers (CORS) [GH-558]
 * Reject invalid configurations to simplify validation [GH-576]
 * Guard against accidental cluster mixing [GH-580] [GH-260]
 * Added option to filter DNS results on warning [GH-595]
 * Improve write throughput with raft log caching [GH-604]
 * Added ability to bind RPC and HTTP listeners to UNIX sockets [GH-587] [GH-612]
 * K/V HTTP endpoint returns 400 on conflicting flags [GH-634] [GH-432]

MISC:

 * UI confirms before deleting key sub-tree [GH-520]
 * More useful output in "consul version" [GH-480]
 * Many documentation improvements
 * Reduce log messages when quorum member is logs [GH-566]

## 0.4.1 (October 20, 2014)

FEATURES:

 * Adding flags for `-retry-join` to attempt a join with
   configurable retry behavior. [GH-395]

BUG FIXES:

 * Fixed ACL token in UI
 * Fixed ACL reloading in UI [GH-323]
 * Fixed long session names in UI [GH-353]
 * Fixed exit code from remote exec [GH-346]
 * Fixing only a single watch being run by an agent [GH-337]
 * Fixing potential race in connection multiplexing
 * Fixing issue with Session ID and ACL ID generation. [GH-391]
 * Fixing multiple headers for /v1/event/list endpoint [GH-361]
 * Fixing graceful leave of leader causing invalid Raft peers [GH-360]
 * Fixing bug with closing TLS connction on error
 * Fixing issue with node reaping [GH-371]
 * Fixing aggressive deadlock time [GH-389]
 * Fixing syslog filter level [GH-272]
 * Serf snapshot compaction works on Windows [GH-332]
 * Raft snapshots work on Windows [GH-265]
 * Consul service entry clean by clients now possible
 * Fixing improper deserialization

IMPROVEMENTS:

 * Use "critical" health state instead of "unknown" [GH-341]
 * Consul service can be targed for exec [GH-344]
 * Provide debug logging for session invalidation [GH-390]
 * Added "Deregister" button to UI [GH-364]
 * Added `enable_truncate` DNS configuration flag [GH-376]
 * Reduce mmap() size on 32bit systems [GH-265]
 * Temporary state is cleaned after an abort [GH-338] [GH-178]

MISC:

 * Health state "unknown" being deprecated

## 0.4.0 (September 5, 2014)

FEATURES:

 * Fine-grained ACL system to restrict access to KV store. Clients
   use tokens which can be restricted to (read, write, deny) permissions
   using longest-prefix matches.

 * Watch mechanisms added to invoke a handler when data changes in consul.
   Used with the `consul watch` command, or by specifying `watches` in
   an agent configuration.

 * Event system added to support custom user events. Events are fired using
   the `consul event` command. They are handled using a standard watch.

 * Remote execution using `consul exec`. This allows for command execution on remote
   instances mediated through Consul.

 * RFC-2782 style DNS lookups supported

 * UI improvements, including support for ACLs.

IMPROVEMENTS:

  * DNS case-insensitivity [GH-189]
  * Support for HTTP `?pretty` parameter to pretty format JSON output.
  * Use $SHELL when invoking handlers. [GH-237]
  * Agent takes the `-encrypt` CLI Flag [GH-245]
  * New `statsd_add` config for Statsd support. [GH-247]
  * New `addresses` config for providing an override to `client_addr` for
    DNS, HTTP, or RPC endpoints. [GH-301] [GH-253]
  * Support [Checkpoint](http://checkpoint.hashicorp.com) for security bulletins
    and update announcements.

BUG FIXES:

  * Fixed race condition in `-bootstrap-expect` [GH-254]
  * Require PUT to /v1/session/destroy [GH-285]
  * Fixed registration race condition [GH-300] [GH-279]

UPGRADE NOTES:

  * ACL support should not be enabled until all server nodes are running
  Consul 0.4. Mixed server versions with ACL support enabled may result in
  panics.

## 0.3.1 (July 21, 2014)

FEATURES:

  * Improved bootstrapping process, thanks to @robxu9

BUG FIXES:

  * Fixed issue with service re-registration [GH-216]
  * Fixed handling of `-rejoin` flag
  * Restored 0.2 TLS behavior, thanks to @nelhage [GH-233]
  * Fix the statsite flags, thanks to @nelhage [GH-243]
  * Fixed filters on criticial / non-passing checks [GH-241]
  * Fixed initial log compaction crash [GH-297]

IMPROVEMENTS:

  * UI Improvements
  * Improved handling of Serf snapshot data
  * Increase reliability of failure detector
  * More useful logging messages


## 0.3.0 (June 13, 2014)

FEATURES:

  * Better, faster, cleaner UI [GH-194] [GH-196]
  * Sessions, which  act as a binding layer between
  nodes, checks and KV data. [GH-162]
  * Key locking. KV data integrates with sessions to
  enable distributed locking. [GH-162]
  * DNS lookups can do stale reads and TTLs. [GH-200]
  * Added new /v1/agent/self endpoint [GH-173]
  * `reload` command can be used to trigger configuration
  reload from the CLI [GH-142]

IMPROVEMENTS:

  * `members` has a much cleaner output format [GH-143]
  * `info` includes build version information
  * Sorted results for datacneter list [GH-198]
  * Switch multiplexing to yamux
  * Allow multiple CA certis in ca_file [GH-174]
  * Enable logging to syslog. [GH-105]
  * Allow raw key value lookup [GH-150]
  * Log encryption enabled [GH-151]
  * Support `-rejoin` to rejoin a cluster after a previous leave. [GH-110]
  * Support the "any" wildcard for v1/health/state/ [GH-152]
  * Defer sync of health check output [GH-157]
  * Provide output for serfHealth check [GH-176]
  * Datacenter name is validated [GH-169]
  * Configurable syslog facilities [GH-170]
  * Pipelining replication of writes
  * Raft group commits
  * Increased stability of leader terms
  * Prevent previously left nodes from causing re-elections

BUG FIXES:

  * Fixed memory leak in in-memory stats system
  * Fixing race between RPC and Raft init [GH-160]
  * Server-local RPC is avoids network [GH-148]
  * Fixing builds for older OSX [GH-147]

MISC:

  * Fixed missing prefixes on some log messages
  * Removed the `-role` filter of `members` command
  * Lots of docs fixes

## 0.2.1 (May 20, 2014)

IMPROVEMENTS:

  * Improved the URL formatting for the key/value editor in the Web UI.
      Importantly, the editor now allows editing keys with dashes in the
      name. [GH-119]
  * The web UI now has cancel and delete folder actions in the key/value
      editor. [GH-124], [GH-122]
  * Add flag to agent to write pid to a file. [GH-106]
  * Time out commands if Raft exceeds command enqueue timeout
  * Adding support for the `-advertise` CLI flag. [GH-156]
  * Fixing potential name conflicts on the WAN gossip ring [GH-158]
  * /v1/catalog/services returns an empty slice instead of null. [GH-145]
  * `members` command returns exit code 2 if no results. [GH-116]

BUG FIXES:

  * Renaming "seperator" to "separator". This is the correct spelling,
      but both spellings are respected for backwards compatibility. [GH-101]
  * Private IP is properly found on Windows clients.
  * Windows agents won't show "failed to decode" errors on every RPC
      request.
  * Fixed memory leak with RPC clients. [GH-149]
  * Serf name conflict resoultion disabled. [GH-97]
  * Raft deadlock possibility fixed. [GH-141]

MISC:

  * Updating to latest version of LMDB
  * Reduced the limit of KV entries to 512KB. [GH-123].
  * Warn if any Raft log exceeds 1MB
  * Lots of docs fixes

## 0.2.0 (May 1, 2014)

FEATURES:

  * Adding Web UI for Consul. This is enabled by providing the `-ui-dir` flag
      with the path to the web directory. The UI is visited at the standard HTTP
      address (Defaults to http://127.0.0.1:8500/). There is a demo
  [available here](http://demo.consul.io).
  * Adding new read consistency modes. `?consistent` can be used for strongly
      consistent reads without caveats. `?stale` can be used for stale reads to
      allow for higher throughput and read scalability. [GH-68]
  * /v1/health/service/ endpoint can take an optional `?passing` flag
      to filter to only nodes with passing results. [GH-57]
  * The KV endpoint suports listing keys with the `?keys` query parameter,
      and limited up to a separator using `?separator=`.

IMPROVEMENTS:

  * Health check output goes into separate `Output` field instead
      of overriding `Notes`. [GH-59]
  * Adding a minimum check interval to prevent checks with extremely
      low intervals fork bombing. [GH-64]
  * Raft peer set cleared on leave. [GH-69]
  * Case insensitive parsing checks. [GH-78]
  * Increase limit of DB size and Raft log on 64bit systems. [GH-81]
  * Output of health checks limited to 4K. [GH-83]
  * More warnings if GOMAXPROCS == 1 [GH-87]
  * Added runtime information to `consul info`

BUG FIXES:

  * Fixed 404 on /v1/agent/service/deregister and
      /v1/agent/check/deregister. [GH-95]
  * Fixed JSON parsing for /v1/agent/check/register [GH-60]
  * DNS parser can handler period in a tag name. [GH-39]
  * "application/json" content-type is sent on HTTP requests. [GH-45]
  * Work around for LMDB delete issue. [GH-85]
  * Fixed tag gossip propagation for rapid restart. [GH-86]

MISC:

  * More conservative timing values for Raft
  * Provide a warning if attempting to commit a very large Raft entry
  * Improved timeliness of registration when server is in bootstrap mode. [GH-72]

## 0.1.0 (April 17, 2014)

  * Initial release