filer: add default log purging to master maintenance scripts (#8359)

* filer: add default log purging to master maintenance scripts

* filer: fix default maintenance scripts to include full set of tasks

* filer: refactor maintenance scripts to avoid duplication

weed/cluster/maintenance/maintenance_config.go

@@ -0,0 +1,14 @@
+package maintenance
+
+const DefaultMasterMaintenanceScripts = `
+  lock
+  ec.encode -fullPercent=95 -quietFor=1h
+  ec.rebuild -apply
+  ec.balance -apply
+  fs.log.purge -daysAgo=7
+  volume.deleteEmpty -quietFor=24h -apply
+  volume.balance -apply
+  volume.fix.replication -apply
+  s3.clean.uploads -timeAgo=24h
+  unlock
+`

weed/command/scaffold/example.go

@@ -1,6 +1,15 @@
 package scaffold
 
-import _ "embed"
+import (
+	_ "embed"
+	"strings"
+
+	"github.com/seaweedfs/seaweedfs/weed/cluster/maintenance"
+)
+
+func init() {
+	Master = strings.ReplaceAll(masterTemplate, "{{DEFAULT_MAINTENANCE_SCRIPTS}}", maintenance.DefaultMasterMaintenanceScripts)
+}
 
 //go:embed filer.toml
 var Filer string
@@ -15,6 +24,7 @@ var Replication string
 var Security string
 
 //go:embed master.toml
+var masterTemplate string
 var Master string
 
 //go:embed shell.toml

weed/command/scaffold/master.toml

@@ -6,17 +6,7 @@
 
 [master.maintenance]
 # periodically run these scripts are the same as running them from 'weed shell'
-scripts = """
-  lock
-  ec.encode -fullPercent=95 -quietFor=1h
-  ec.rebuild -apply
-  ec.balance -apply
-  volume.deleteEmpty -quietFor=24h -apply
-  volume.balance -apply
-  volume.fix.replication -apply
-  s3.clean.uploads -timeAgo=24h
-  unlock
-"""
+scripts = """{{DEFAULT_MAINTENANCE_SCRIPTS}}"""
 sleep_minutes = 17          # sleep minutes between each script execution
 
 

weed/server/master_server.go

@@ -13,6 +13,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/seaweedfs/seaweedfs/weed/cluster/maintenance"
 	"github.com/seaweedfs/seaweedfs/weed/stats"
 	"github.com/seaweedfs/seaweedfs/weed/telemetry"
 
@@ -312,6 +313,7 @@ func (ms *MasterServer) proxyToLeader(f http.HandlerFunc) http.HandlerFunc {
 
 func (ms *MasterServer) startAdminScripts() {
 	v := util.GetViper()
+	v.SetDefault("master.maintenance.scripts", maintenance.DefaultMasterMaintenanceScripts)
 	adminScripts := v.GetString("master.maintenance.scripts")
 	if adminScripts == "" {
 		return