feat: use cron to run backups

Dockerfile

@@ -1,5 +1,12 @@
 FROM kopia/kopia 
 
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update && apt-get install -y cron && rm -rf /var/lib/apt/lists/*
+
+ARG KOPIA_CRON_TIMES="*/30 * * * *"
+ENV KOPIA_CRON_TIMES ${KOPIA_CRON_TIMES}
+
+ADD run-backup.sh  / 
 ADD entrypoint.sh  / 
 
 ENTRYPOINT [ "/entrypoint.sh" ]

entrypoint.sh

@@ -1,10 +1,11 @@
 #!/bin/sh
 
-kopia --version
+CRONTAB=/etc/cron.d/kopia-backup
 
-kopia repository connect filesystem \
+echo "Running cron with schedule ${KOPIA_CRON_TIMES}"
-    --path /repository \
-    --override-hostname ${KOPIA_HOSTNAME} \
-    --override-username ${KOPIA_USERNAME}
 
-sleep infinity
+echo "${KOPIA_CRON_TIMES} /run-backup.sh > /dev/stdout" > ${CRONTAB}
+chmod 0644 ${CRONTAB}
+crontab ${CRONTAB}
+
+cron -f

run-backup.sh

@@ -0,0 +1,10 @@
+#!/bin/sh 
+
+kopia --version
+
+kopia repository connect filesystem \
+    --path /repository \
+    --override-hostname ${KOPIA_HOSTNAME} \
+    --override-username ${KOPIA_USERNAME}
+
+kopia snapshot create /backup