DFM proxy create volume python

[#1]

Hi Guys,

I am currently trying to write a script to create volume via DFM as proxy.

I tried the API via direct filer, it works. Only via DFM proxy it doesn't work.

I keep getting the following errors if using dfm-proxy:

[root@vmwebtest Python]# python test aa zzz 10
11.7
Error: Missing required argument 'volume'

Code snipet:

import sys
sys.path.append("/var/lib/NetApp/Python/")
from NaServer import *

def print_usage():
   print ("Usage: nfs-bis.py <volname> <aggrname> <volsize> \n")
   print ("<volname> -- Volume name to be created\n")
   print ("<aggrname> -- Aggregate name\n")
   print ("<volsize> -- Request ordered size\n")
   sys.exit (1)


args = len(sys.argv) - 1
if(args < 3):
    print_usage()

volname = sys.argv[1]
aggrname = sys.argv[2]
volsize = int(sys.argv[3]) * 1.17

s = NaServer("192.168.59.12", 1 , 0)
s.set_server_type("DFM")
s.set_transport_type("HTTPS")
s.set_port(8488)
#s.set_style("LOGIN")
s.set_admin_user("root", "start123")

# Connects to DFM-Proxy
proxyElem = NaElement("api-proxy")
proxyElem.child_add_string("target", "192.168.59.20")
proxyElem.child_add(requestElem)

# ONTAPI API arg set here
requestElem = NaElement("request")
requestElem.child_add_string("name", "volume-create")
requestElem.child_add_string("containing-aggr-name","aggr1")
requestElem.child_add_string("language-code","en_US")
requestElem.child_add_string("size","50m")
requestElem.child_add_string("space-reserve","none")
requestElem.child_add_string("volume","testPython1")
out = s.invoke_elem(proxyElem)

if (out.results_status() == 'failed'):
    print(out.results_reason())
    print ("Error : " + out.results_reason() + "\n")
    sys.exit (1)

dfmResponse = out.child_get('response')

if (dfmResponse.child_get_string('status') == 'failed'):
    print ("Error: " + dfmResponse.child_get_string("reason") + "\n")
    sys.exit (1)

ontapiResponse = dfmResponse.child_get('results')

if (ontapiResponse.results_status() == 'failed'):
    print (ontapiResponse.results_reason() + "\n")
    sys.exit (1)

print(ontapiResponse.sprintf())

[#2 · Accepted solution]

Hi Daniel

In order to make your code doing what you wish, you need to create a new element called "args" where you add the arguments of volume-create zapi call. 

In case you face a problem with SSL certificate verification, add 2 additional lines (3-4).

So, the working code should look like:

import sys
# disable certificate verification in case of SSL certificate verification problem, comment out otherwise
import ssl
ssl._create_default_https_context = ssl._create_unverified_context

sys.path.append("/var/lib/NetApp/Python/")
from NaServer import *

def print_usage():
   print ("Usage: nfs-bis.py <volname> <aggrname> <volsize> \n")
   print ("<volname> -- Volume name to be created\n")
   print ("<aggrname> -- Aggregate name\n")
   print ("<volsize> -- Request ordered size\n")
   sys.exit (1)


args = len(sys.argv) - 1
if(args < 3):
    print_usage()

volname = sys.argv[1]
aggrname = sys.argv[2]
volsize = int(sys.argv[3]) * 1.17

s = NaServer("192.168.59.12", 1 , 0)
s.set_server_type("DFM")
s.set_transport_type("HTTPS")
s.set_port(8488)
#s.set_style("LOGIN")
s.set_admin_user("root", "start123")

# Connects to DFM-Proxy
proxyElem = NaElement("api-proxy")
proxyElem.child_add_string("target", "192.168.59.20")
proxyElem.child_add(requestElem)

# create element with volume-create arguments
volcreateArgs = NaElement("args")
volcreateArgs.child_add_string("volume","testPython1")
volcreateArgs.child_add_string("containing-aggr-name","aggr1")
volcreateArgs.child_add_string("language-code","en_US")
volcreateArgs.child_add_string("size","50m")
volcreateArgs.child_add_string("space-reserve","none")

# ONTAPI API arg set here
requestElem = NaElement("request")
requestElem.child_add_string("name", "volume-create")

# add arguments to volume-create zapi call
requestElem.child_add(volcreateArgs)
out = s.invoke_elem(proxyElem)

if (out.results_status() == 'failed'):
    print(out.results_reason())
    print ("Error : " + out.results_reason() + "\n")
    sys.exit (1)

dfmResponse = out.child_get('response')

if (dfmResponse.child_get_string('status') == 'failed'):
    print ("Error: " + dfmResponse.child_get_string("reason") + "\n")
    sys.exit (1)

ontapiResponse = dfmResponse.child_get('results')

if (ontapiResponse.results_status() == 'failed'):
    print (ontapiResponse.results_reason() + "\n")
    sys.exit (1)

print(ontapiResponse.sprintf())

Here's the result...

## C4XXYYZZAA> vol status testPython1
##          Volume State           Status                Options
##     testPython1 online          raid_dp, flex         create_ucode=on, convert_ucode=on,
##                                 64-bit                guarantee=none, fractional_reserve=0
##                          Volume UUID: 4eccc808-9b0c-4cea-8d40-d7b5865a9e81
## 		Containing aggregate: 'aggr1'

Hope it helps .

Pavol

[#3]

awesome. thanks alot. I figure out it was something missing becoz the filer logs shown that no argument was pass on.