Massive refactoring to use local JSONRPC interface.

.gitignore

@@ -0,0 +1,2 @@
+build/
+__pycache__/

Makefile

@@ -0,0 +1,36 @@
+PYTHON_SRCS= \
+	miner_exporter.py \
+	miner_jsonrpc.py
+
+PYTHON?= python3
+
+DESTROOT?= /home/helium/validator_exporter
+
+BUILT_SERVICE= build/validator_exporter.service
+STARTUP= build/run
+
+all: $(BUILT_SERVICE) $(STARTUP)
+
+install: $(DESTROOT)/pyenv $(STARTUP)
+	for pysrc in $(PYTHON_SRCS); do \
+		install -D $$pysrc $(DESTROOT); \
+	done
+	install $(STARTUP) $(DESTROOT)
+
+install-service: $(BUILT_SERVICE)
+	install $(BUILT_SERVICE) /etc/systemd/system
+
+$(DESTROOT)/pyenv:
+	$(PYTHON) -m venv $@ && . $(DESTROOT)/pyenv/bin/activate && pip install -r requirements.txt
+
+$(BUILT_SERVICE): validator_exporter.service.in
+	mkdir -p build
+	sed -e s,@@DESTROOT@@,$(DESTROOT),g < $< > $@
+
+$(STARTUP): run.sh.in
+	mkdir -p build
+	sed -e s,@@DESTROOT@@,$(DESTROOT),g < $< > $@
+
+clean:
+	rm -f $(BUILT_SERVICE)
+

README.md

@@ -35,15 +35,32 @@ services:
 ## Running locally
 On the miner machine:
 
-install python3
+install python3, python3-venv
+
 ```
-pip install prometheus_client psutil docker
+pip install prometheus_client
 ```
 Details on the libraries:
 * [client\_python](https://github.com/prometheus/client_python)
-* [psutil](https://github.com/giampaolo/psutil)
-* [docker](https://pypi.org/project/docker/)
 
+Then install the service in a home directory:
+
+```
+sudo make install
+```
+
+Then install the systemd unit file:
+
+```
+sudo make install-service
+```
+
+Then enable and start the service:
+
+```
+sudo systemctl enable validator_exporter
+sudo systemctl start validator_exporter
+```
 
 ## Configuration