initial version

Dockerfile

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+FROM alpine:3.8
+
+RUN apk add --no-cache postgresql
+ADD loop.sh /
+
+ENV POSTGRES_USER=postgres
+ENV POSTGRES_DATABASE=postgres
+ENV POSTGRES_PORT=5432
+ENV INTERVAL=3600
+
+ENTRYPOINT ["/loop.sh"]
+
+

README.md

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+# POSTGRES_REFRESH
+
+Periodically refresh materialized postgresql views
+
+## Usage
+
+This docker image can be configured using the following environment variables.
+
+| Variable           | Default  | Comment                                  |
+| ------------------ | -------- | ---------------------------------------- |
+| $POSTGRES_HOST     | -        | database host                            |
+| $POSTGRES_PORT     | 5432     | database port                            |
+| $POSTGRES_USER     | postgres | database user                            |
+| $POSTGRES_PASSWORD | -        | database password                        |
+| $POSTGRES_DATABASE | postgres | database name containing the views       |
+| $VIEWS             | -        | space separated list of views to refresh |
+| $INTERVAL          | 3600     | Time between refreshes in seconds        |

loop.sh

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+#!/usr/bin/env sh
+
+while [ : ]; do
+    for view in $VIEWS; do
+        echo "refreshing $view"
+        env PGPASSWORD=$POSTGRES_PASSWORD psql -p $POSTGRES_PORT -U $POSTGRES_USER -h $POSTGRES_HOST $POSTGRES_DATABASE -c "REFRESH MATERIALIZED VIEW $view"
+    done
+
+    sleep $INTERVAL
+done