Add stdio-expose and epics module loading

Author: gilesknap

Charts/dev-c7/templates/statefulset.yaml

@@ -68,9 +68,9 @@ spec:
             {{- toYaml . | nindent 12 }}
           {{- end }}
           env:
-          # make sure that the $HOME path is writeable
+          # psuedo home sets up epics module etc.
           - name: HOME
-            value: /tmp
+            value: /epics_home
           imagePullPolicy: {{ .Values.image.pullPolicy }}
           {{- with .Values.livenessProbe }}
           livenessProbe:

Charts/dev-c7/values.yaml

@@ -35,8 +35,8 @@ image:
 # @schema description: container entry point command
 command:
   - bash
-  - -c
-  - ./bin/linux-x86_64/st*.sh
+  - -lc
+  - stdio-expose ./bin/linux-x86_64/st*.sh
 
 # @schema description: enable host networking for the pod
 hostNetwork: false

Dockerfile

@@ -74,3 +74,20 @@ RUN yum remove -y git git-core && \
 # change the nobody account and group IDs to match RedHat
 RUN sed -i 's/99:99/65534:65534/' /etc/passwd && \
     sed -i 's/:99:/:65534:/' /etc/group
+
+# Install uv using the official image
+# See https://docs.astral.sh/uv/guides/integration/docker/#installing-uv
+COPY --from=ghcr.io/astral-sh/uv:0.8 /uv /uvx /bin/
+WORKDIR /opt
+
+ENV UV_PYTHON_INSTALL_DIR=/python
+ENV PATH="${PATH}:/opt/.venv/bin"
+
+# Add in stdio socket for sharing the epics console
+RUN uv venv --managed-python --python 3.12 && \
+    uv pip install stdio-socket && \
+    chmod -R a+rwX /opt/.venv
+
+# Make a psuedo home directory for running in cluster
+COPY epics_home /epics_home
+RUN chmod a+rws /epics_home

epics_home/.bashrc

@@ -0,0 +1,15 @@
+#! /bin/bash
+
+# Source global definitions
+if [ -f /etc/bashrc ]; then
+    . /etc/bashrc
+fi
+
+# Source global definitions
+if [ -f ~/bashrc_local ]; then
+    . ~/.bashrc_local
+fi
+
+module load epics/3.14.12.7
+
+alias console=/opt/.venv/bin/console

epics_home/README.md

@@ -0,0 +1,5 @@
+# epics_home
+
+This is a psuedo home directory for launching EPICS IOCs in-cluster using dev-c7.
+
+It allows us to have a writeable home directory and also to set up the module system with .bashrc. This in turn lets us load the epics module and gives access to caRepeater amoungst other things.