Cleanup conversion webhooks when an operator is uninstalled #2832
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Problem: When uninstalling a CSV, OLM has always avoided deleting the associated CRD as all CRs on cluster are subsequently deleted, possibly resulting in user dataloss. OLM supports defining conversion webhooks within the CSV. On cluster, conversion webhooks are defined with a CRD and point to a service that handles conversion. If the service is unable to fulfill the request, all requests against the CRs associated with the CRD will fail. When uninstalling a CSV, OLM does not remove the conversion webhook from the CRD, meaning that all requests against the CRs associated with the CRD will fail, resulting in at least two concerns: 1. OLM is unable to subsequently reinstall the operator. When installing a CSV, if the CRD already exists and instances of CRs exist as well, OLM performs a series of checks which ensure that none of the CRs are invalidated against the new schema. The existing CRD's conversion webhooks points to a non-existant service, causing the check to fail and preventing installs. 2. Broken conversion webhooks causes kubernete's garbage collection to fail. Solution: When a CSV is deleted, if no CSV exists that is replacing it, set the CRD's conversion strategy to None. Signed-off-by: Alexander Greene <greene.al1991@gmail.com>
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Addresses #2830
Problem: When uninstalling a CSV, OLM has always avoided deleting the
associated CRD as all CRs on cluster are subsequently deleted, possibly
resulting in user dataloss.
OLM supports defining conversion webhooks within the CSV. On cluster,
conversion webhooks are defined within a CRD and point to a service that
handles conversion. If the service is unable to fulfill the request,
all requests against the CRs associated with the CRD will fail.
When uninstalling a CSV, OLM does not remove the conversion webhook from
the CRD, meaning that all requests against the CRs associated with the
CRD will fail, resulting in at least two concerns:
a CSV, if the CRD already exists and instances of CRs exist as well,
OLM performs a series of checks which ensure that none of the CRs are
invalidated against the new schema. The existing CRD's conversion
webhooks points to a non-existant service, causing the check to fail
and preventing installs.
fail.
Solution: When a CSV is deleted, if no CSV exists that is replacing it,
set the CRD's conversion strategy to None.