HP Serviceguard Toolkit for NFS manual Server-to-Server Cross Mounting, Nfs Nfs

Page 17

Overview of Serviceguard NFS

Supported Conﬁgurations

Server-to-Server Cross Mounting

Two NFS server nodes may NFS-mount each other’s ﬁle systems and still act as adoptive nodes for each other’s NFS server packages. Figure 1-5 illustrates this conﬁguration.

Figure 1-5		Server-to-Server Cross Mounting
	Before Failover:

	Node_A						Node_B
	/Pkg_2/NFS/mountpoint						/Pkg_1/NFS/mountpoint
	/Pkg_1/NFS/mountpoint			NFS	NFS		/Pkg_2/NFS/mountpoint
			NFS	mount	mount NFS
			mount		mount

/Pkg_1/local/mountpoint

/Pkg_2/local/mountpoint

Pkg_1 disks

Pkg_2 disks

After Failover:

Node_A

/Pkg_2/NFS/mountpoint

/Pkg_1/NFS/mountpoint

/Pkg_1/local/mountpoint

NFS NFS

mount mount

Pkg_1 disks

Node_B

/Pkg_1/NFS/mountpoint /Pkg_2/NFS/mountpoint

/Pkg_2/local/mountpoint

/Pkg_1/local/mountpoint

Pkg_2 disks

Chapter 1

17

Image 17

Contents Edition Serviceguard NFS Toolkit A.11.11.04 Administrator’s GuideLegal Notices Contents Index Figures Figures Overview of Serviceguard NFS Overview of Serviceguard NFS Limitations of Serviceguard NFS Overview of the NFS File Lock Migration Feature Overview of the NFS File Lock Migration Feature Supported Conﬁgurations Pkg1 disks Simple Failover to an Idle NFS ServerPkg2 Disks Failover from One Active NFS Server to AnotherPackages Host Conﬁgured as Adoptive Node for MultipleCascading Failover with Three Adoptive Nodes NFS NFS Server-to-Server Cross MountingSupported Conﬁgurations Starting File Lock Migration Starting the NFS ServicesHow the Control and Monitor Scripts Work Halting the NFS Services Monitoring the NFS Services On the Client Side Installing and Conﬁguring Installing and Conﬁguring Serviceguard NFS Readme Installing Serviceguard NFSCmmakepkg -p /opt/cmcluster/nfs/nfs.conf Serviceguard NFS Toolkit Monitoring NFS/TCP Services withMonitoring NFS/TCP Services with Serviceguard NFS Toolkit Before Creating a Serviceguard NFS Package NUMNFSD=10 Before Creating a Serviceguard NFS Package Mount -o nointr relocatableip/usr/src /usr/src Conﬁguring a Serviceguard NFS Package Copying the Template Files Editing the Control Script nfs.cntl IP0=15.13.114.243 SUBNET0=15.13.112.0 Lower Etc/hosts ﬁle Conﬁguring a Serviceguard NFS Package Editing the NFS Control Script hanfs.sh Netswitchingenabled Editing the File Lock Migration Script nfs.ﬂm Conﬁguring a Serviceguard NFS Package Editing the NFS Monitor Script nfs.mon Conﬁguring a Serviceguard NFS Package Editing the Package Conﬁguration File nfs.conf Conﬁguring a Serviceguard NFS Package Conﬁguring Server-to-Server Cross-Mounts Optional SNFS0=nfs1/hanfs/nfsu011CNFS0=/nfs/nfsu011 Conﬁguring a Serviceguard NFS Package Run the cluster using the following command cmruncl -v-f Conﬁguring a Serviceguard NFS Package Chapter Sample Conﬁgurations Sample Conﬁgurations Basil Sage Example One Three-Server Mutual TakeoverThree-Server Mutual Takeover after One Server Fails Cluster Conﬁguration File for Three-Server Mutual Takeover Package Conﬁguration File for pkg01 Nfs.cntl Control Script NFS Control Scripts for pkg01Package Conﬁguration File for pkg02 NFS Control Scripts for pkg02 Package Conﬁguration File for pkg03 NFS Control Scripts for pkg03 Packages with File Lock Migration Example Two One Adoptive Node for TwoSage Basil Pkg02 VOLUMEGROUP/dev/nfsu01 VOLUMEGROUP/dev/nfsu02 Package Conﬁguration File for pkg01 NFS Control Scripts for pkg01 Hanfs.sh Control Script Nfs.ﬂm Script NFS File Lock Migration and Monitor Scripts for pkg01Package Conﬁguration File for pkg02 NFS Control Scripts for pkg02 NFSFLMSCRIPT=$0%/*/nfs2.flm NFS File Lock Migration and Monitor Scripts for pkg02 Failover Example Three Three-Server CascadingCascading Failover with Three Servers after One Server Fails VOLUMEGROUP/dev/nfsu01 VOLUMEGROUP/dev/nfsu02 Package Conﬁguration File for pkg01 NFS Control Scripts for pkg01 NODENAMEthyme NODENAMEsage NODENAMEbasil IP0=15.13.114.244 SUBNET0=15.13.112.0 Example Four Two Servers with NFS Cross-Mounts Thyme Basil Cluster Conﬁguration File for Two-Server NFS Cross-Mount NODENAMEthyme NODENAMEbasil NFS Control Scripts for pkg01 SNFS0=nfs1/hanfs/nfsu011 CNFS0=/nfs/nfsu011 NODENAMEbasil NODENAMEthyme NFS Control Scripts for pkg02 SNFS0=nfs2/hanfs/nfsu021 CNFS0=/nfs/nfsu021 Index Index Default values

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