ZFS Networker

Backup of ZFS snapshots on Solaris Cluster with Legato/EMC Networker

First of all: 1. Install Solaris client package LGTOclnt 2. Register new resource type in cluster. One one node do:

# clrt register -f /usr/sbin/LGTO.clnt.rtr LGTO.clnt

Now you have a new resource type LGTO.clnt in your cluster.

The structure of my RGs is always:

RG:                <name>-rg
ZFS-HASP:          <name>-hasp-zfs-res
Logical Host:      <name>-lh-res
Logical Host Name: <name>-lh

So I use scripts like this:

# RGname=sample-rg
# clrs create \
  -t LGTO.clnt \
  -g ${RGname} \
  -p Resource_dependencies=$(basename ${RGname} -rg)-hasp-zfs-res \
  -p clientname=$(basename ${RGname} -rg)-lh \
  -p Network_resource=$(basename ${RGname} -rg)-lh-res \
  -p owned_paths=/local/${RGname} \
  $(basename ${RGname} -rg)-nsr-res

This expands to:

# clrs create \
  -t LGTO.clnt \
  -g sample-rg \
  -p Resource_dependencies=sample-hasp-zfs-res \
  -p clientname=sample-lh \
  -p Network_resource=sample-lh-res \
  -p owned_paths=/local/sample-rg \
  sample-nsr-res

Now we have a client name to which we can connect: sample-lh

What we need now is a resource definition in our Networker directory like this:

# cat /nsr/res/sample.res
type: savepnpc;
precmd: "/local/sample-rg/nsr/networker_precmd.sh >/local/sample-rg/nsr/networker_precmd.log 2>&1";
pstcmd: "/local/sample-rg/nsr/networker_pstcmd.sh >/local/sample-rg/nsr/networker_pstcmd.log 2>&1";
timeout: "12:00pm";
abort precmd with group: Yes;

Of course our sample.res is just a link:

# ls -al /nsr/res/sample.res 
lrwxrwxrwx   1 root     root          40 Sep  5  2014 /nsr/res/sample.res -> /local/sample-rg/nsr/res/sample.res

So we have no need to copy it to every node. But we need the link on every node!