- restructures the docs to make them easier to explore
- rewrites promtail docs
- unifies, shortens and extends docs

use a global variable to wrap debug log statments in the pipeline to prevent unnecessary allocations when debug logging is not enabled

Signed-off-by: Xiang Dai <764524258@qq.com>

Fixes #280

- keep supporting regex for old endpoint.
- use reserved keyword for removed property in grpc

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

- adds avg,min,max,top,bottomk,stddev,stdvar,count
- updates api documentation
- adds tests

Improve yacc & go lexer to understand duration
Remove support for regexp in all queries
Clean up querier and logselector

Currently, it's difficult to determine what permissions Loki needs to operate against S3 and DynamoDB from the provided documentation. This commit adds the permissions necessary to operator Loki, to provide admins guidance on how they can run Loki with the least possible privilege.

The label used previously, important, implied precedence rather than
just a desire to keep an issue alive.

See [probot-stale's](https://github.com/probot/stale) repository for full
list of configuration options.

prefix has been removed as a field in Cortex and needs to be removed
from the ksonnet as well.

* update cortex to latest master

using v3.4.0-rc.1 for go.etcd.io/etcd
v0.0.2 for github.com/prometheus/procfs
v1.0.0 for github.com/prometheus/client_golang
latest master for github.com/weaveworks/common with changes from https://github.com/weaveworks/common/pull/153

* fixed failing tests

* use large instance for test and lint jobs in CircleCI

* running only 6 test binaries in parallel

* removed resource type change for CircleCI

* changed GOGC to 10 for lint makefile target

* Do not send the last batch from promtail on graceful shutdown if the batch is empty

* Tested promtail Client.Handle()

The journal scrape config in promtail has been updated to support
a "max_age" field. max_age determines the oldest journal entry
promtail will read when starting the journal reader. When
unspecified, max_age defaults to 7h.

Even if a position in the journal is saved in the promtail
positions file, that position may be ignored if the entry corresponding
to that position is older than the max_age cutoff time.

Example promtail config for getting up to the last 12h of journal
entries:

  server:
    http_listen_port: 9080
    grpc_listen_port: 0

  positions:
    filename: /tmp/positions.yaml

  clients:
    - url: http://localhost:3100/api/prom/push

  scrape_configs:
  - job_name: journal
    journal:
      max_age: 12h
      path: /var/log/journal
      labels:
        job: systemd-journal
    relabel_configs:
      - source_labels: ['__journal__systemd_unit']
        target_label: 'unit'

* add quota for sed

Signed-off-by: Xiang Dai <764524258@qq.com>

* add comment for head

Signed-off-by: Xiang Dai <764524258@qq.com>

adding the beginnings of the release doc with steps, fixing a bug in the release_prepare.sh script and tweaking the output based on the current process.

* improvements in bigtable backup tool

Added some metrics for monitoring of backup jobs
Added a command to delete out of range backups, otherwise, there would be more backups than expected and alerts would start firing for unexpected backups