GitLab

switch to dynamically looking up Ubuntu images

See merge request !9

Get the latest Ubuntu 18.04 image instead of hardcoding ourselves to
what may become and outdated image.

upgrade to Terraform 0.12

See merge request !8

Update to the Terraform 0.12 DSL and provide info on how folks can do
updates.

Small fixes

See merge request !7

Without noninteractive set then a package upgrade can prompt us to
answer a question which cannot be answered.

If the runner machines have already been deleted then we don't want to
fail to destroy.

Tag x86 runners

See merge request !6

Signed-off-by: Wei Liu <[email protected]>

Use noninteractive frontend, so that when there is a conflict in
service configuration files, the default action is taken.

Move changing sshd_config after dist-upgrade, to avoid the "default
action" overrides our own setting. That's not likely to happen, but
better safe than sorry.
Signed-off-by: Wei Liu <[email protected]>

Fix state deletion issue, remove old fields, add random name for key

See merge request !5

Should this be used with multiple terraform runs or multiple keys be
generated by accident, attempt to link a name to each key and its
resources to help tracking them easier.

Removed the old gitlab-runner instance since we're using the
docker-machine instance exclusively now. Reordered some of the variables
and renamed them to match the docker-machine scheme.

Due to a bug in the terraform.io docs
https://github.com/hashicorp/terraform/issues/19005 the configuration
for the state is actually incorrect and gets deleted after 7 days
instead of being versioned and stored persistently. Switch to using
`archive_container` which is the actual field that the docs should have
described as setting up object versioning.

fix destroying the gitlab-docker-machine

See merge request !3

When destroying the gitlab-docker-machine, the gitlab-runner service
needs to be stopped to avoid it respawning another runner VM. The test
expression in bash was failing until it was quoted.
Signed-off-by: Doug Goldstein <[email protected]>

Autoscaling with docker machine

See merge request !2

Gitlab has global configurations which can't be added by the register
command. Use a template file for that.
Signed-off-by: Wei Liu <[email protected]>

Signed-off-by: Wei Liu <[email protected]>

Provision a bastion machine: install gitlab-runner and docker-machine,
then register it with gitlab.

This requires providing some new variables and a new script.
Signed-off-by: Wei Liu <[email protected]>

Signed-off-by: Wei Liu <[email protected]>

The backend cannot be parameterized so rename the parameterized username
to user_name so that its consistent with the backend.

The terraform.tfstate is data that contains sensitive bits but must also
be shared if multiple people or multiple machines will be used to manage
the running configuration. Enable the usage of terraform's remote
backend system to store the data in Cloud Files under the same account
where the Cloud Servers are spun up.

The following creates valid GitLab Runners for the Xen Project's GitLab
group, enabling them for all projects under the group.
Signed-off-by: Doug Goldstein <[email protected]>

Create a repo for storing terraform based configs for the Xen GitLab CI
infrastructure.