*: cut 2.8.0-rc.0 (#5287)

* Release 2.8.0-rc.0

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

* Mark tsdb/370 experimental and update flag.

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

* 5290 as BUGFIX

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

* Fix review comments

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

CHANGELOG.md

@@ -1,3 +1,24 @@
+## 2.8.0-rc.0 / 2019-03-06
+
+* [CHANGE] `prometheus_tsdb_storage_blocks_bytes_total` is now `prometheus_tsdb_storage_blocks_bytes`. prometheus/tsdb#506
+* [FEATURE] [EXPERIMENTAL] Time overlapping blocks are now allowed; vertical compaction and vertical query merge. It is an optional feature which is controlled by the `--storage.tsdb.allow-overlapping-blocks` flag, disabled by default. prometheus/tsdb#370
+* [ENHANCEMENT] Use the WAL for remote_write API. #4588
+* [ENHANCEMENT] Query performance improvements. prometheus/tsdb#531
+* [ENHANCEMENT] UI enhancements with upgrade to Bootstrap 4. #5226
+* [ENHANCEMENT] Reduce time that Alertmanagers are in flux when reloaded. #5126
+* [ENHANCEMENT] Limit number of metrics displayed on UI to 10000. #5139
+* [ENHANCEMENT] (1) Remember All/Unhealthy choice on target-overview when reloading page. (2) Resize text-input area on Graph page on mouseclick. #5201
+* [ENHANCEMENT] In `histogram_quantile` merge buckets with equivalent le values. #5158.
+* [ENHANCEMENT] Show list of offending labels in the error message in many-to-many scenarios. #5189
+* [BUGFIX] Fix sorting of rule groups. #5260
+* [BUGFIX] Fix support for password_file and bearer_token_file in Kubernetes SD. #5211
+* [BUGFIX] Scrape: catch errors when creating HTTP clients #5182. Adds new metrics:
+  * `prometheus_target_scrape_pools_total`
+  * `prometheus_target_scrape_pools_failed_total`
+  * `prometheus_target_scrape_pool_reloads_total`
+  * `prometheus_target_scrape_pool_reloads_failed_total`
+* [BUGFIX] Fix panic when aggregator param is not a literal. #5290
+
 ## 2.7.2 / 2019-03-02
 
 * [BUGFIX] `prometheus_rule_group_last_evaluation_timestamp_seconds` is now a unix timestamp. #5186

VERSION

@@ -1 +1 @@
-2.7.2
+2.8.0-rc.0