nfsexports.py

#!/usr/bin/env python3

# python script to generate commands to create nfs mounts 
# on a new cluster from a source cluster
# where isi nfs exports list --format=json > nfsexports.json
# is used as the input

# current features tracked are:  
# clients, root clients, export description, read-only clients, read-write-clients

import json

with open('depot_nfs_exports.json') as nfsexports:
    nfs_export_data = json.load(nfsexports)


for i in nfs_export_data:

    # comma separated client list
    clients = ""
    if (len(i['clients']) == 0):
        # no clients listed
        pass
    else:
        for client in i['clients']:
            clients += client + ","
    # remove trailing comma
    if(clients):
        clients = " --clients " + clients[0:len(clients)-1]
    else: 
        clients = ""

    # comma separated root client list
    rootclients = ""
    if (len(i['root_clients']) == 0):
        # no clients
        pass
    else:
        for rootclient in i['root_clients']:
            rootclients += rootclient + ","
    # remove trailing comma
    if(rootclients): 
        rootclients = " --root-clients " + rootclients[0:len(rootclients)-1]
    else:
        rootclients = ""
    
    # comma separated read-write client list
    rwclients = ""
    if (len(i['read_write_clients']) == 0):
        # no read-write clients
        pass
    else:
        for rwclient in i['read_write_clients']:
            rwclients += rwclient + ","
    # remove trailing comma
    if(rwclients): 
        rwclients = " --read-write-clients " + rwclients[0:len(rwclients)-1]
    else:
        rwclients = ""

    # comma separated read-only client list
    roclients = ""
    if (len(i['read_only_clients']) == 0):
        # no read-only clients
        pass
    else:
        for roclient in i['read_only_clients']:
            roclients += roclient + ","
    # remove trailing comma
    if(roclients): 
        roclients = " --read-only-clients " + roclients[0:len(roclients)-1]
    else:
        roclients = ""

    # read only mount
    readonly = ""
    if (i['read_only'] == False):
        pass
    else:
        readonly = "--read-only yes"

    # export description
    description = ""
    if str(i['description']) == "":
        # no description data
        pass
    else:
        description = " --description \""+ str(i['description']) + "\""

    alldirs = ""
    if (i['all_dirs'] == True):
        alldirs = " --all-dirs true"
    else:
        alldirs = " --all-dirs false"

    maproot = ""
    if (i['map_root']['enabled'] == True):
        maprootusergroup = i['map_root']['user']+":"+i['map_root']['primary_group']+","+i['map_root']['secondary_groups']
        maproot = " --map-root-enabled true --map-root="+maprootusergroup
    else:
        maproot = " --map-root-enabled false"

    mapnonroot = ""
    if (i['map_non_root']['enabled'] == True):
        mapnonrootusergroup = i['map_root']['user']+":"+i['map_root']['primary_group']+","+i['map_root']['secondary_groups']
        mapnonroot = " --map-non-root-enabled true --map-non-root="+mapnonrootusergroup
    else:
        mapnonroot = " --map-non-root-enabled false"

    # put together the command per nfs export
    command = "isi nfs exports create "
    path = str(i['paths'][0])
    
    print(command + path + clients + rootclients + roclients + rwclients +
            description + readonly + alldirs + maproot + mapnonroot + "\n")