use environment for CA/PVA ports

template/.devcontainer/.env

@@ -0,0 +1,3 @@
+EPICS_CA_SERVER_PORT=5064
+EPICS_CA_REPEATER_PORT=5065
+EPICS_PVA_SERVER_PORT=5075

template/.devcontainer/devcontainer.json

@@ -47,17 +47,18 @@
         "--security-opt=label=disable"
     ],
     "appPort": [
-        // Expose Channel Access on the hosts loopback interface
-        // NOTE: change the first port number to run more than one devcontainer
-        // on the same host.
+        // Expose Channel Access ports on the host's loopback interface
+        // Note: update the environment variables in .devcontainer/.env to
+        // change the ports when running multiple devcontainers simultaneously,
+        // then use e.g. EPICS_CA_ADDR_LIST="127.0.0.1:5064 127.0.0.1:6064"
+        // for clients to connect to multiple devcontainers' PVs.
         //
-        // To access two devcontainers from the host for example:
-        // EPICS_CA_ADDR_LIST="127.0.0.1:5064 127.0.0.1:6064"
-        "127.0.0.1:5064:5064/udp",
-        "127.0.0.1:5064-5065:5064-5065",
-        // "127.0.0.1:5076:5076/udp", PVA UDP does not work into container network
-        // expose pva name server access via TCP
-        "5075-5076:5075-5076"
+        "127.0.0.1:${remoteEnv:EPICS_CA_SERVER_PORT}:${remoteEnv:EPICS_CA_SERVER_PORT}/udp",
+        "127.0.0.1:${remoteEnv:EPICS_CA_SERVER_PORT}:${remoteEnv:EPICS_CA_SERVER_PORT}",
+        "127.0.0.1:${remoteEnv:EPICS_CA_REPEATER_PORT}:${remoteEnv:EPICS_CA_REPEATER_PORT}",
+        //
+        // Expose the PVA name server port on all host interfaces
+        "${remoteEnv:EPICS_PVA_SERVER_PORT}:${remoteEnv:EPICS_PVA_SERVER_PORT}"
     ],
     // Mount the parent of the project folder so we can access peer projects
     "workspaceMount": "source=${localWorkspaceFolder}/..,target=/workspaces,type=bind",

template/opi/phoebus-launch.sh

@@ -5,9 +5,17 @@
 thisdir=$(realpath $(dirname $0))
 workspace=$(realpath ${thisdir}/..)
 
+# update settings.ini with CA and PVA ports
+source ${workspace}/.devcontainer/.env
+cat ${workspace}/opi/settings.ini |
+    sed -r \
+    -e "s|5064|${EPICS_CA_SERVER_PORT}|" \
+    -e "s|5075|${EPICS_PVA_SERVER_PORT}|" \
+    -e "s|5065|${EPICS_CA_REPEATER_PORT}|" > /tmp/settings.ini
+
 settings="
 -resource ${workspace}/opi/auto-generated/index.bob
--settings ${workspace}/opi/settings.ini
+-settings /tmp/settings.ini
 "
 
 if which phoebus.sh &>/dev/null ; then
@@ -40,8 +48,8 @@ else
     image="ghcr.io/epics-containers/ec-phoebus:latest"
 
     settings="
-    -settings /workspace/opi/settings.ini
     -resource /workspace/opi/auto-generated/index.bob
+    -settings /tmp/settings.ini
     "
 
     set -x

template/opi/settings.ini

@@ -1,3 +1,11 @@
+# NOTE: port numbers are defaults only
+# this script to be processed with sed to replace port numbers
+# see phoebus-launch.sh
+
 # point at local host for channel access
 org.phoebus.pv.ca/addr_list=127.0.0.1
+org.phoebus.pv.ca/server_port=5064
+org.phoebus.pv.ca/repeater_port=5065
+# point at local host for pvAccess name server
 org.phoebus.pv.pva/epics_pva_name_servers=127.0.0.1
+org.phoebus.pv.pva/server_port=5075