Switch to use cron job

Dockerfile:
    * Updating base image

Signed-off-by: Tuan T. Pham <[email protected]>

Dockerfile

@@ -1,13 +1,11 @@
-FROM python:alpine3.18 as builder
+FROM python:3.9.18-alpine3.18 as builder
 LABEL maintainer "tuan t. pham" <[email protected]>
 
 ENV PKGS="py3-virtualenv"
 
 RUN apk update && apk add ${PKGS} \
     && mkdir -p /opt/pp-code-metrics
-
 COPY ./requirements.txt /opt/pp-code-metrics
-
 RUN cd /opt/pp-code-metrics \
     && virtualenv metrics \
     && source /opt/pp-code-metrics/metrics/bin/activate \
@@ -17,9 +15,10 @@ RUN cd /opt/pp-code-metrics \
 
 FROM mikefarah/yq:latest as yq_base
 
-FROM python:alpine3.18 as deploy
+FROM python:3.9.18-alpine3.18 as deploy
 
 ENV PKGS="py3-virtualenv"
+ENV DOCKERIZE_URL="https://github.com/jwilder/dockerize/releases/download/v0.7.0/dockerize-alpine-linux-amd64-v0.7.0.tar.gz"
 
 RUN apk update && apk add ${PKGS} \
     && mkdir -p /opt/pp-code-metrics
@@ -34,4 +33,11 @@ COPY --from=yq_base /usr/bin/yq /usr/bin/yq
 WORKDIR /opt/pp-code-metrics
 ENV VIRT_PYTHON=/opt/pp-code-metrics/metrics/bin/python3
 
-CMD  ["/opt/pp-code-metrics/run_get_metrics.sh", "my_settings.yml"]
+RUN wget -O - ${DOCKERIZE_URL} | tar xzf - -C /usr/local/bin
+
+RUN mkdir -p /etc/cron.d
+COPY crontab/pp-code-metrics.tmpl /etc/cron.d/
+ENTRYPOINT dockerize --template /etc/cron.d/pp-code-metrics.tmpl:/etc/cron.d/pp-code-metrics crontab /etc/cron.d/pp-code-metrics && \
+	/usr/sbin/crond -f -d 0
+
+#CMD  ["/opt/pp-code-metrics/run_get_metrics.sh", "my_settings.yml"]

crontab/pp-code-metrics.tmpl

@@ -0,0 +1,5 @@
+# Run get_metrics.py every 10 minutes
+
+#
+
+*/{{ .Env.INTERVAL }} * * * *   /opt/pp-code-metrics/run_get_metrics.sh my_settings.yml

docker-compose.yml

@@ -7,12 +7,14 @@ services:
     hostname: pp-code-metrics
     image: neofob/pp-code-metrics:latest
     restart: always
+    environment:
+      INTERVAL: 10
     volumes:
       - ./my_settings.yml:/opt/pp-code-metrics/my_settings.yml:ro
     deploy:
       resources:
         limits:
-          memory: 32M
+          memory: 64M
     logging:
       driver: "json-file"
       options:

get_metrics.py

@@ -142,7 +142,7 @@ def getNodeMetrics(node):
             for i in range(3):
                 try:
                     write_api.write(bucket=influxdb_bucket, record=p)
-                except NewConnectionError:
+                except ConnectionError:
                     time.sleep(5)
                     countinue
         if try_again:

run_get_metrics.sh

@@ -1,13 +1,11 @@
 #!/usr/bin/env sh
 set -o nounset                              # Treat unset variables as an error
 
-INTERVAL=$(cat $1 | yq '.General.interval')
-echo "INTERVAL=$INTERVAL"
+#INTERVAL=$(cat $1 | yq '.General.interval')
+#echo "INTERVAL=$INTERVAL"
 #INTERVAL=${INTERVAL:=600}
 
 VIRT_PYTHON=${VIRT_PYTHON:=/home/vagrant/.virtualenvs/metrics/bin/python3}
 
-while true; do
-  ${VIRT_PYTHON} ./get_metrics.py --config $1
-  sleep ${INTERVAL}s
-done
+cd /opt/pp-code-metrics
+${VIRT_PYTHON} ./get_metrics.py --config $1

sample_settings.yml

@@ -1,7 +1,8 @@
 # Default settings
 ---
 General:
-  Interval: 600
+  # It is in minutes for cron job config now
+  Interval: 10
 
 InfluxDB:
 # avoid using 'localhost' when this is deployed to be used by get_metrics.py