In order to help users check that they have implemented the newly-added
Multus host configuration prerequisites, add a check to the validation
tool to verify connectivity.
Because users who are already running clusters with Multus enabled, add
a flag that allows users to only check for host configuration
prerequisites. This mode will not start the large number of clients that
would normally be started because those clients could disrupt a running
Rook cluster negatively.
Host checking pods require host network access. Many Kubernetes
distributions have pod security features enabled. In order to allow
non-Vanilla distros to run this tool, allow specifying a service account
that pods will run as, which can be configured by the admin to allow
test pods.
Signed-off-by: Blaine Gardner <blaine.gardner@ibm.com>
Use Quay as the source for the nginx-unprivileged image used for the
Multus validation tool because Quay does not rate limit image pulls,
which are a common complaint for users of the tool.
Signed-off-by: Blaine Gardner <blaine.gardner@ibm.com>
Add the ability to specify node profiles in the multus validation test.
This addresses a few points of early feedback on the validation tool.
Statements below critique the tool's behavior before this patch.
1. The tool assumes all daemons are on public and cluster network, which
means users who have a significantly smaller cluster net (a
design choice) cannot run a single test to determine if Rook is
likely to install correctly.
2. The tool does not have placement options to select only a subset of
Kubernetes nodes to run validation on.
3. Users of multus seem to have a dedicated pool of storage nodes more
often than the average Rook install. This makes sense for security-
and perforance-minded users. The tool cannot run a single test to
verify storage-only and general-workload nodes at one time.
These points are addressed by allowing users to specify configurations
for different "NodeTypes."
Each NodeType config has options for selecting the number of OSDs as
well as the number of other (non-OSD) Ceph daemons. This limits the
unnecessary exhaustion of cluster network addresses from critique 1.
Each NodeType config has its own placement (critique 2).
Users can define as many NodeTypes as needed to test the network for
their planned CephCluster. Specifically, this allows the tool to test
storage-only nodes and generalized-workload nodes at the same time. An
arbitrary number of NodeTypes are allowed to support even more highly
specialized cluster setups, such as multiple tiers of storage nodes
where some storage-only nodes may run more OSDs than others.
Signed-off-by: Blaine Gardner <blaine.gardner@ibm.com>
Allow the validation tool to read test config from a yaml file. To help
users, also allow outputting a config file with default values and
comments instructing how to use the config file.
This work is in anticipation of adding more advanced configuration
options that would be too cumbersome to set using cli flags.
Signed-off-by: Blaine Gardner <blaine.gardner@redhat.com>
Joshua Hoblitt
Blaine Gardner
Sheetal Pamecha
Blaine Gardner