Title: Re: How can I get a PV from an external server from inside
a docker container?
Hey,
just for completeness, if you know the IP addresses of all your
IOCs you can also use the default docker network and set the
Environment variables
EPICS_CA_AUTO_ADDR_LIST no
EPICS_CA_ADDR_LIST <list of all CA server IP addresses>
In this case, the udp broadcast part of CA seems to be omitted
and CA checks the list of IPs directly.
At least this worked in my very first tests with containerization
of our clients (Archiver, Alarm system, .....)
But of course this approach is rather error prone and you need to
change your config every time an IP address changes/is being
added.
On the other hand, this is the only way I know of if running
docker in rootless mode.
Cheers,
Florian
Am 26.03.2024 um 09:59 schrieb Carsten
Winkler via Tech-talk:
Hello
Dale, hello Florian,
many
thanks for your helpful advises. Now I could solve the issue
simply by adding "network_mode: host" to the service
"epicsbase".
Now
my working docker-compose.yml looks like:
services:
epicsbase:
image: softioc
container_name: epicsbase
volumes:
- ./epicsbase/db:/usr/local/db
working_dir: /usr/local/epics
command:
- /bin/sh
- -c
- |
echo start first Soft IOC
screen -d -m
/usr/local/epics/epics-base/bin/linux-x86_64/softIoc -D
/usr/local/epics/epics-base/dbd/softIoc.dbd -d
/usr/local/db/test.db
tail -f /dev/null # keep alive
network_mode: host
Best
regards
Carsten
--------------------Ursprüngliche
Nachricht--------------------
Von: Carsten
Winkler <carsten.winkler at helmholtz-berlin.de>
Gesendet: Montag 25. März 2024 14:55
An: tech-talk at aps.anl.gov
Betreff: How can I get a PV from an
external server from inside a docker container?
Hello,
I have 3 SoftIOCs.
1.) local host = 193.100.100.100 with PV: "local_pv"
2.) external host = 192.200.200.200 with PV:
"external_pv"
3.) docker container on local host with PV:
"docker_pv"
From local host I can read all PVs
(caget local_pv external_pv docker_pv). 👍
From inside the docker container I can read the local_pv and
the docker_pv
but not the external_pv. 🤔
Here is my docker compose configuration:
services:
epicsbase:
image: softioc
container_name: epicsbase
volumes:
- ./epicsbase/db:/usr/local/db
working_dir: /usr/local/epics
command:
- /bin/sh
- -c
- |
echo start first Soft IOC
screen -d -m
/usr/local/epics/epics-base/bin/linux-x86_64/softIoc -D
/usr/local/epics/epics-base/dbd/softIoc.dbd -d
/usr/local/db/test.db
tail -f /dev/null # keep alive
networks:
- ioc-net
networks:
ioc-net:
From inside the docker
container I have also already tried EPICS_CA_AUTO_ADDR_LIST /
EPICS_CA_ADDR_LIST. Unfortunately without success.
With and without these environment variables I only get the
local_pv and the docker_pv.
How can I also read the external_pv from
inside the docker container?
Best regards
Carsten
--
Ruhr-Universität Bochum
AG der Experimentalphysik I
Dr. Florian Feldbauer
NB 2/131 / Fach 125
Universitätsstr. 150
D-44801 Bochum
Office: NB 2/134
Phone: (+49)234 / 32-23563
Fax: (+49)234 / 32-14170
https://paluma.ruhr-uni-bochum.de
- Replies:
- Re: How can I get a PV from an external server from inside a docker container? Johnson, Andrew N. via Tech-talk
- Re: How can I get a PV from an external server from inside a docker container? Érico Nogueira Rolim via Tech-talk
- References:
- How can I get a PV from an external server from inside a docker container? Carsten Winkler via Tech-talk
- Re: How can I get a PV from an external server from inside a docker container? Carsten Winkler via Tech-talk
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