Experimental Physics and Industrial Control System
Hi John,
Do you know which version of the Base libraries you are using, both for
pcasPy and for the soft IOC? I know we made some changes to the network
interface code recently, and you might find that if you can get pcasPy
to use the latest Base-3.15.5 versions of the libraries the behaviour
might be different. I can't promise it will fix it, but it would be
helpful to know.
One thing I did notice in your ifconfig output, the broadcast inet
address for your container has not been set; configuring that might make
a difference (it's worth trying at least).
- Andrew
On 03/30/2017 11:58 AM, Sparger, John E. wrote:
> Hi,
>
>
>
> If I try to run pcaspy in docker, I get the following error in CAS:
>
>
>
> ```
>
> filename="../../../../src/cas/io/bsdSocket/casDGIntfIO.cc" line number=121
>
> server isnt attached to a network - unable to continue
>
> filename="../../../../src/cas/io/bsdSocket/caServerIO.cc" line number=116
>
> Attempt to set server's IP address/port failed unable to attach explicit
> interface
>
> filename="../../../../src/cas/generic/caServerI.cc" line number=59
>
> server isnt attached to a network - CA server internals init unable to
> continue
>
> terminate called after throwing an instance of 'int'
>
> ```
>
>
>
> I understand that this has something to do with CAS's interface
> detection. However, if I run `softIOC` with the following db
>
>
>
> ```
>
> echo "record(ai,"test_pv") {
>
> field(VAL,"3")
>
> }" > test.db
>
>
>
> softIOC -d test.db
>
> ```
>
>
>
> It works fine and I can `caget testpv` from another container without
> issue. This leads me to believe that the plumbing is there but that
> there is some assumption made in how CAS detects broadcast interfaces
> that is not holding true in docker.
>
>
>
> Have you all been able to successfully run pcaspy or cas-based servers
> in docker? Are there some environment variables I can set to help cas along?
>
>
>
> I should note that setting `EPICS_CAS_INTF_ADDR_LIST="localhost"` WILL
> allow pcaspy will run in docker, but then the PVs are not visible
> outside that docker container, so it's not that useful.
>
>
>
> Also for reference, here is what ifconfig returns from inside the container:
>
>
>
> ```
>
> ifconfig
>
> eth0 Link encap:Ethernet HWaddr 02:42:ac:11:00:02
>
> inet addr:172.17.0.2 Bcast:0.0.0.0 Mask:255.255.0.0
>
> inet6 addr: fe80::42:acff:fe11:2/64 Scope:Link
>
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
>
> RX packets:237 errors:0 dropped:0 overruns:0 frame:0
>
> TX packets:186 errors:0 dropped:0 overruns:0 carrier:0
>
> collisions:0 txqueuelen:0
>
> RX bytes:240235 (234.6 KiB) TX bytes:11013 (10.7 KiB)
>
>
>
> lo Link encap:Local Loopback
>
> inet addr:127.0.0.1 Mask:255.0.0.0
>
> inet6 addr: ::1/128 Scope:Host
>
> UP LOOPBACK RUNNING MTU:65536 Metric:1
>
> RX packets:3 errors:0 dropped:0 overruns:0 frame:0
>
> TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
>
> collisions:0 txqueuelen:1
>
> RX bytes:208 (208.0 B) TX bytes:208 (208.0 B)
>
> ```
>
>
>
> Thanks for the help,
>
>
>
> John Sparger
>
--
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different than making the claim, "I don't care about freedom of
speech because I have nothing to say." -- Edward Snowdon
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