This is an initial change to separate out config-specific k8s objects
from the control-plane components. The eventual goal will be rendering
these configs as the first stage of a multi-stage install.
Part of #2337
Signed-off-by: Andrew Seigner <siggy@buoyant.io>
This change moves resource-templating logic into a dedicated template,
creates new values types to model kubernetes resource constraints, and
changes the `--ha` flag's behavior to create these resource templates
instead of hardcoding the resource constraints in the various templates.
Some of our templates have started to use 'with .Values' scoping to
limit boilerplate within the tempates.
This change makes this uniform in all templates.
The introduction of identity in 0626fa37 created new state in the
control plane's configuration that must be considered when re-installing
the control plane or when injecting pods.
This change alters `install` to fail if it would seem to conflict with
an existing installation. This behavior may be disabled with the
`--ignore-cluster` flag.
Furthermore, `inject` now _requires_ that it can fetch a configuration
from the control plane in order to operate. Otherwise the
`--ignore-cluster` and `--disable-identity` flags must be specified.
This change does not actually instrument pods to use identity yet---it
lays the framework for proxy identity without changing the test fixture
output (besides a change to how identity HA is configured).
Fixes#2531
chart/templates/base.yaml is nearly 800 lines and contains the
kubernetes configurations for the marjority of the control plane.
Furthermore, its contents are not particularly organized (for example,
the prometheus RBAC bindings are in the middle of the controller's
configuration).
The size and complexity of this file makes it especially daunting to
introduce new functionality.
In order to make the situation easier to understand and change, this
splits base.yaml into several new template files: namespace, controller,
serviceprofile, and prometheus, and grafana. The `tls.yaml` template has
been renamed `ca.yaml`, since it installs the `linkerd-ca` resources.
This change also makes the comments uniform, adding a "header" to each
logical component.
Fixes#2154
Andrew Seigner
Oliver Gould