The underlying [c-code] vpp client API library supports one client connection. It’s not conceptually difficult to support multiple connections, but it would take a lot of typing and testing.
You can raise it as a feature request, but I wouldn’t plan on seeing it any time soon. D. From: Peter Mikus -X (pmikus - PANTHEON TECHNOLOGIES at Cisco) Sent: Friday, May 11, 2018 6:44 AM To: Justin Iurman <[email protected]> Cc: Dave Barach (dbarach) <[email protected]>; Damjan Marion <[email protected]>; vpp-dev <[email protected]> Subject: RE: [vpp-dev] vpp_api_test via socket file Hello, Thank you for the pointers. Seems to be working although with few notes: 1. It is not possible to keep both connection open: vpp1 = VPP(jsonfiles) r1 = vpp1.connect('vpp1', chroot_prefix='vpp1') print('VPP1 version', vpp1.api.show_version().version.decode().rstrip('\0x00')) vpp2 = VPP(jsonfiles) r2 = vpp2.connect('vpp2', chroot_prefix='vpp2') print('VPP2 version', vpp2.api.show_version().version.decode().rstrip('\0x00')) vpp1.disconnect() vpp2.disconnect() >> DEBUG:vpp_papi:No such message type or failed CRC checksum: >> cdp_enable_disable_4eec6097 >> DEBUG:vpp_papi:No such message type or failed CRC checksum: >> cdp_enable_disable_reply_e8d4e804 >> ('VPP1 version', u'18.04-release') >> WARNING:vpp_papi:VPP API client:: vac_connect:285: vl_client_api map rv -1 >> >> WARNING:vpp_papi:VPP API client:: vac_connect:285: vl_client_api map rv -1 >> >> Traceback (most recent call last): >> File "pythonAPI.py", line 18, in <module> >> r2 = vpp2.connect('vpp2', chroot_prefix='vpp') >> File "/usr/lib/python2.7/dist-packages/vpp_papi.py", line 690, in connect >> async) >> File "/usr/lib/python2.7/dist-packages/vpp_papi.py", line 661, in >> connect_internal >> raise IOError(2, 'Connect failed') >> IOError: [Errno 2] Connect failed >> DEBUG:vpp_papi:Cleaning up VPP on exit On the other side this is possible: vpp1 = VPP(jsonfiles) r1 = vpp1.connect('vpp1', chroot_prefix='vpp1') print('VPP1 version', vpp1.api.show_version().version.decode().rstrip('\0x00')) vpp1.disconnect() vpp2 = VPP(jsonfiles) r2 = vpp2.connect('vpp2', chroot_prefix='vpp2') print('VPP2 version', vpp2.api.show_version().version.decode().rstrip('\0x00')) vpp2.disconnect() >> DEBUG:vpp_papi:No such message type or failed CRC checksum: >> cdp_enable_disable_4eec6097 >> DEBUG:vpp_papi:No such message type or failed CRC checksum: >> cdp_enable_disable_reply_e8d4e804 >> ('VPP1 version', u'18.04-release') >> DEBUG:vpp_papi:No such message type or failed CRC checksum: >> cdp_enable_disable_4eec6097 >> DEBUG:vpp_papi:No such message type or failed CRC checksum: >> cdp_enable_disable_reply_e8d4e804 >> ('VPP2 version', u'18.04-release') 1. print('VPP1', intf.interface_name.decode().rstrip('\0x00')) broke the output of interface 7/0/0 >> ('VPP1', u'TenGigabitEthernet7/0/') 1. DEBUG:vpp_papi:No such message type or failed CRC checksum: cdp_enable_disable_4eec6097 DEBUG:vpp_papi:No such message type or failed CRC checksum: cdp_enable_disable_reply_e8d4e804 Looks like some API’s need update 1. Connect() requires sudo, that means script needs to be running as root. Peter Mikus Engineer – Software Cisco Systems Limited From: Justin Iurman [mailto:[email protected]] Sent: Friday, May 11, 2018 9:59 AM To: Peter Mikus -X (pmikus - PANTHEON TECHNOLOGIES at Cisco) <[email protected]<mailto:[email protected]>> Cc: Dave Barach (dbarach) <[email protected]<mailto:[email protected]>>; Damjan Marion <[email protected]<mailto:[email protected]>>; vpp-dev <[email protected]<mailto:[email protected]>> Subject: Re: [vpp-dev] vpp_api_test via socket file Peter, …however, are there any other options to full control 2+ instances of VPP via API (not vppctl)? PythonAPI for example [1]. Ole’s answer to the same question: r = vpp.connect('vpp1', chroot_prefix='name of shared address segment') Cheers, Justin
