Because drone.io provides us with native ARM runners, we evaluate the platform to figure out if it is a suitable replacement for CircleCI and qemu.

Configuration is done using .drone/drone.jsonnet, the .drone/drone.yml is generated from that.
Images are built on amd64, arm64 and arm, natively and without emulation. This allows to get rid of cross-compilation, which in turn allows more advanced builds (CGO, etc.)

Hopefully this will make the CI faster and more reliable in the future. Let's see!

This PR sets up an automated release pipeline to cross compile build artifacts and publish them to github. mitchellh/gox is used for building, ghr for publishing

- bump build image to 0.4.0
- re-gen protos
- re-add deploy task

This finally adds support for multiple architectures!  

Images are now built using BuildKit (actually img), Dockerfiles were parameterized to allow this.
Containers are still built on alpine, using QEMU and binfmt as a kernel compatibility layer to allow RUN steps in these.

CircleCI has been fully revamped, to speed up builds and de-duplicate the configuration.
Makefile has been extended with additional logic to shadow the multi-arch to non-CI users.

Happy hacking on Raspberry Pi and friends :)

docker-driver-push does a build of all the go files and as such needs to make called with BUILD_IN_CONTAINER=false from circleci

refactor(makefile): simplify makefile by removing the autogenerated targets and make building binaries and dockerfiles separate operations.

Support for reading systemd journal entries has been added. 
promtail will look for a job in scrape_configs with a journal key 
to activate the journal target. 

If GOOS=linux and CGO_ENABLED=1, promtail will now require 
libsystemd headers to be available for building. If GOOS is not 
linux or CGO_ENABLED is not 1, journal support will be unavailable
and a log message will be printed warning the user that their config 
file has journal tailing configured without it being built into promtail. 

See docs/promtail-examples.md for a concrete example of 
using journal support. 

Other structural changes made: 

  1. Ability for checking if scrape.Config.ServiceDiscoveryConfig is 
     non-zero has been added. 

     This was chosen over making ServiceDiscoveryConfig a pointer
     as yaml.v2 cannot parse an inline struct into a pointer value. 

  2. Updated pipeline logger component name to journal_pipeline and
     file_pipeline for JournalTargetManager and FileTargetManager
     respectively.

  3. The positions file will now store positions as strings instead of 
     integers. Existing positions will be read in properly but written out 
     as strings the next time the positions file is saved. This is done to 
     be able to store the journal cursor, which is a string. The positions 
     API has been updated to support reading in the old integer values 
     and the new string values. 

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

* fix docker plugin ci

* use binary cache

* adds first version of docker driver

* without logrus and fixes some linter issue

* fix the driver and start a build system

* adds swarm label discovery

* Add documentation and more targets

* make the linter happy 

* indent config.json

* with circleci steps for master and branch

* Review Feebacks

* Helm chart integration testing

Signed-off-by: Steven Sheehy <ssheehy@firescope.com>

* Don't check helm version on every push

Signed-off-by: Steven Sheehy <ssheehy@firescope.com>

* Remove chart upgrade testing

Signed-off-by: Steven Sheehy <ssheehy@firescope.com>

Build promtail on linux and windows, discard artifacts

* switch to golangci-lint linter

* fixes for review comments

Signed-off-by: Steven Sheehy <ssheehy@firescope.com>

* Tag with latest


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

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>

* Push master images

Signed-off-by: Goutham Veeramachaneni <gouthamve@gmail.com>

* Push master automatically.

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>

* Rename Tempo to Loki.

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>

* Use new build image, don't delete generated files on clean.

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>

* Check in generated files, to make getting started easier.

Add gometalinter, and a lint check for changes to the generated files.

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>

* Make lint pass?

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>