make backups

Dockerfile

@@ -0,0 +1,16 @@
+
+FROM golang:1.13-alpine as certs
+RUN apk update && apk add --no-cache ca-certificates
+
+FROM busybox:glibc
+RUN mkdir -p /var/log
+WORKDIR /main
+COPY --from=certs /etc/ssl/certs /etc/ssl/certs
+
+COPY . .
+
+ENV GOPATH=""
+ENV MNT="/mnt/"
+ENTRYPOINT ["/main/exec-rssmon3"]
+CMD []
+

main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"local/lastn/lastn"
 	"local/rssmon3/config"
 	"local/rssmon3/handlers"
 	"local/rssmon3/monitor"
@@ -8,6 +9,7 @@ import (
 	"log"
 	"os"
 	"os/signal"
+	"path/filepath"
 	"syscall"
 	"time"
 )
@@ -37,6 +39,8 @@ func main() {
 	h := handlers.New(m.Outgoing)
 	go InterruptAfter(h.Run, sigc)
 
+	go EnqueueBackups()
+
 	signal.Notify(sigc,
 		syscall.SIGHUP,
 		syscall.SIGINT,
@@ -54,3 +58,38 @@ func InterruptAfter(foo func() error, c chan os.Signal) {
 	}
 	c <- syscall.SIGINT
 }
+
+func EnqueueBackups() {
+	realpath, err := filepath.Abs(config.Values().Addr)
+	if err != nil {
+		log.Println("dir", config.Values().Addr, "not found, so no backups")
+		return
+	}
+	conf := lastn.Config{
+		N:      3,
+		Rclone: realpath + "-backups",
+		Root:   realpath,
+		Ns:     "backups",
+		Store:  "rclone",
+		Conf:   "/dev/null",
+	}
+	log.Printf("backups conf: %+v", conf)
+	lastn, err := lastn.New(conf)
+	if err != nil {
+		log.Println("backups disabled:", realpath, ":", err)
+		return
+	}
+	ticker := time.NewTicker(time.Hour * 24)
+	if err := lastn.Push(); err != nil {
+		log.Println("backup failed:", err)
+	}
+	for _ = range ticker.C {
+		log.Println("backing up...")
+		if err := lastn.Push(); err != nil {
+			log.Println("backup push failed:", err)
+		}
+		if err := lastn.Clean(); err != nil {
+			log.Println("backup clean failed:", err)
+		}
+	}
+}