Enable configuring default exclude namespaces when installing velero server.

[jhuisss]

Describe the problem/challenge you have When we have installed velero server from helm chart or simply velero install CLI command, where is no way to pre-configure the exclude namespaces.

Why I raise this issue is due to that, when I run cmd "velero backup create ***", I always need to exclude certain namespaces. And either I can not update the velero helm chart to pre-define the exclude-namespace.

Describe the solution you'd like [A clear and concise description of what you want to happen.] It is expected that I can pre-define exclude-namespaces when I install velero server.

Anything else you would like to add: N/A

Environment:

• Velero version (use velero version): v1.8.1

• Kubernetes version (use kubectl version):

kubectl version

Client Version: version.Info{Major:"1", Minor:"21", GitVersion:"v1.21.2", GitCommit:"092fbfbf53427de67cac1e9fa54aaa09a28371d7", GitTreeState:"clean", BuildDate:"2021-06-16T12:59:11Z", GoVersion:"go1.16.5", Compiler:"gc", Platform:"linux/amd64"} Server Version: version.Info{Major:"1", Minor:"23", GitVersion:"v1.23.8+vmware.2", GitCommit:"d625665700d901401d7504761cf473dd8adfc7b3", GitTreeState:"clean", BuildDate:"2022-07-18T23:04:08Z", GoVersion:"go1.17.11", Compiler:"gc", Platform:"linux/amd64"}

• OS (e.g. from /etc/os-release): $ cat /etc/os-release NAME="VMware Photon OS" VERSION="3.0" ID=photon VERSION_ID=3.0 PRETTY_NAME="VMware Photon OS/Linux" ANSI_COLOR="1;34" HOME_URL="https://vmware.github.io/photon/" BUG_REPORT_URL="https://github.com/vmware/photon/issues"

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[reasonerjt]

Personally, I find this requirement way too opinionated. You can write a script to add the param --exclude-namespaces to the CLI or write a program to trigger your backup via the CRD. I'll put this in "Icebox" until we see this is a very common requirement.