This is the fix for only one particular, but important case.
The case when a new resource has been added to the chart and
there is an error in the chart, which leads to release failure.
In this case after first failed release upgrade new resource will be
created in the cluster. On the next release upgrade there will be the error:
`no RESOURCE with the name NAME found` for this newly created resource
from the previous release upgrade.
The root of this problem is in the side effect of the first release process,
Release invariant says: if resouce exists in the kubernetes cluster, then
it should exist in the release storage. But this invariant has been broken
by helm itself -- because helm created new resources as side effect and not
adopted them into release storage.
To maintain release invariant for such case during release upgrade operation
all newly *successfully* created resources will be deleted in the case
of an error in the subsequent resources update.
This behaviour will be enabled only when `--cleanup-on-fail` option used
for `helm upgrade` or `helm rollback`.
Signed-off-by: Timofey Kirillov <timofey.kirillov@flant.com>
Extracted delete specific code from ReleaseServer to external function
which is called from both Local and Remote ReleaseModules.
Made getVersionSet function from tiller package exported.
This change introduces the concept of Rudders - pluggable modules that
Tiller communicates with via grpc, which allow to decouple orchestration
logic from Tiller into separate service.
This commit consists of simple Rudder implementation which does exactly
the same thing as built in Tiller orchestrator - it creates all k8s
objects from provided manifest without orchestrating them.
--experimental-release flag is introduced to enable this behaviour.
This change allows to use the service and tiller outside of the cluster.
Following commits will add Rudder to helm deployment.
Timofey Kirillov
Adam Reese
Matthew Fisher
Dmitry Shulyak
peay
Sushil Kumar
Maciej Kwiek
Maciej Kwiek