Dev: bootstrap: add gfs2 stage functionality (Technical Preview)

[liangxin1300]

Usage

# Setup the cluster on the current node, with SBD+GFS2
crm cluster init -s <share disk1> -g <share disk2> -y

# Setup the cluster on the current node, with SBD+GFS2+Cluster LVM
crm cluster init -s <share disk1> -g <share disk2> -g <share disk3> -C -y

# Add GFS2+Cluster LVM on a running cluster
crm cluster init gfs2 -g <share disk1> -g <share disk2> -C -y

BTW, -o option is still available to bootstrapping OCFS2, if applicable

Test packages: https://build.opensuse.org/projects/home:XinLiang:branches:network:ha-clustering:Factory/packages/crmsh/repositories/openSUSE_Tumbleweed/binaries

still need to resolve the failure of the bootstrap oneliner to setup clusterfs with sbd

[codecov]

Codecov Report

Attention: Patch coverage is 83.91813% with 55 lines in your changes missing coverage. Please review.

Project coverage is 69.75%. Comparing base (562ce84) to head (28fe540).
Report is 9 commits behind head on master.

Files with missing lines	Patch %	Lines
crmsh/cluster_fs.py	80.89%	47 Missing ⚠️
crmsh/bootstrap.py	80.00%	5 Missing ⚠️
crmsh/report/collect.py	95.31%	3 Missing ⚠️

Additional details and impacted files

Flag	Coverage Δ
integration	53.57% <32.16%> (-0.28%)	⬇️
unit	53.11% <79.82%> (+0.34%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
crmsh/report/constants.py	100.00% <100.00%> (ø)
crmsh/ui_cluster.py	75.14% <100.00%> (+0.19%)	⬆️
crmsh/report/collect.py	96.68% <95.31%> (-0.33%)	⬇️
crmsh/bootstrap.py	88.34% <80.00%> (+0.04%)	⬆️
crmsh/cluster_fs.py	80.89% <80.89%> (ø)

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[liangxin1300]

Issue: should detect if required rpm packages are available on each node, when using gfs2/ocfs2 stage

[zzhou1]

LGFM about the use cases