Dev: bootstrap: add gfs2 stage functionality (Technical Preview) (#1628)

## 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

Author: liangxin1300

crmsh/bootstrap.py

@@ -36,6 +36,7 @@
 from . import userdir
 from .constants import QDEVICE_HELP_INFO, STONITH_TIMEOUT_DEFAULT,\
         REJOIN_COUNT, REJOIN_INTERVAL, PCMK_DELAY_MAX, CSYNC2_SERVICE, WAIT_TIMEOUT_MS_DEFAULT
+from . import cluster_fs
 from . import qdevice
 from . import parallax
 from . import log
@@ -70,7 +71,7 @@
         "/etc/samba/smb.conf", SYSCONFIG_NFS, SYSCONFIG_PCMK, SBDManager.SYSCONFIG_SBD, PCMK_REMOTE_AUTH, watchdog.Watchdog.WATCHDOG_CFG,
         PROFILES_FILE, CRM_CFG, SBDManager.SBD_SYSTEMD_DELAY_START_DIR)
 
-INIT_STAGES_EXTERNAL = ("ssh", "csync2", "corosync", "sbd", "cluster", "admin", "qdevice")
+INIT_STAGES_EXTERNAL = ("ssh", "csync2", "corosync", "sbd", "cluster", "ocfs2", "gfs2", "admin", "qdevice")
 INIT_STAGES_INTERNAL = ("csync2_remote", "qnetd_remote")
 INIT_STAGES_ALL = INIT_STAGES_EXTERNAL + INIT_STAGES_INTERNAL
 JOIN_STAGES_EXTERNAL = ("ssh", "csync2", "ssh_merge", "cluster")
@@ -111,6 +112,10 @@ def __init__(self):
         self.qdevice_heuristics = None
         self.qdevice_heuristics_mode = None
         self.qdevice_rm_flag = None
+        self.ocfs2_devices = []
+        self.gfs2_devices = []
+        self.use_cluster_lvm2 = None
+        self.mount_point = None
         self.cluster_node = None
         self.force = None
         self.arbitrator = None
@@ -269,7 +274,7 @@ def _validate_stage(self):
         if self.type == "init":
             if self.stage not in INIT_STAGES_ALL:
                 utils.fatal(f"Invalid stage: {self.stage}(available stages: {', '.join(INIT_STAGES_EXTERNAL)})")
-            if self.stage in ("admin", "qdevice") and not self.cluster_is_running:
+            if self.stage in ("admin", "qdevice", "ocfs2") and not self.cluster_is_running:
                 utils.fatal(f"Cluster is inactive, can't run '{self.stage}' stage")
             if self.stage in ("corosync", "cluster") and self.cluster_is_running:
                 utils.fatal(f"Cluster is active, can't run '{self.stage}' stage")
@@ -288,6 +293,8 @@ def validate_option(self):
         """
         if self.qdevice_inst:
             self.qdevice_inst.valid_qdevice_options()
+        if self.ocfs2_devices or self.gfs2_devices or self.stage in ("ocfs2", "gfs2"):
+            cluster_fs.ClusterFSManager.pre_verify(self)
         if not self.skip_csync2 and self.type == "init":
             self.skip_csync2 = utils.get_boolean(os.getenv("SKIP_CSYNC2_SYNC"))
         if self.skip_csync2 and self.stage:
@@ -1402,6 +1409,26 @@ def init_sbd():
     _context.sbd_manager.init_and_deploy_sbd()
 
 
+def init_ocfs2():
+    """
+    OCFS2 configure process
+    """
+    if not _context.ocfs2_devices:
+        return
+    ocfs2_manager = cluster_fs.ClusterFSManager(_context)
+    ocfs2_manager.init()
+
+
+def init_gfs2():
+    """
+    GFS2 configure process
+    """
+    if not _context.gfs2_devices:
+        return
+    gfs2_manager = cluster_fs.ClusterFSManager(_context)
+    gfs2_manager.init()
+
+
 def init_cluster():
     """
     Initial cluster configuration.
@@ -2187,6 +2214,8 @@ def bootstrap_init(context):
                 init_cluster()
                 init_admin()
                 init_qdevice()
+                init_ocfs2()
+                init_gfs2()
         except lock.ClaimLockError as err:
             utils.fatal(err)
 
@@ -2284,6 +2313,7 @@ def bootstrap_join(context):
                     join_csync2(cluster_node, remote_user)
                 join_ssh_merge(cluster_node, remote_user)
                 probe_partitions()
+                join_cluster_fs(cluster_node, remote_user)
                 join_cluster(cluster_node, remote_user)
         except (lock.SSHError, lock.ClaimLockError) as err:
             utils.fatal(err)
@@ -2295,6 +2325,14 @@ def bootstrap_finished():
     logger.info("Done (log saved to %s on %s)", log.CRMSH_LOG_FILE, utils.this_node())
 
 
+def join_cluster_fs(peer_host, peer_user):
+    """
+    If init node configured OCFS2/GFS2 device, verify that device on join node
+    """
+    inst = cluster_fs.ClusterFSManager(_context)
+    inst.join(peer_host)
+
+
 def remove_qdevice() -> None:
     """
     Remove qdevice service and configuration from cluster