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package main
import (
"context"
"os"
"slices"
"strings"
"time"
"github.com/lxc/incus/v6/internal/server/db/operationtype"
"github.com/lxc/incus/v6/internal/server/instance"
"github.com/lxc/incus/v6/internal/server/instance/instancetype"
"github.com/lxc/incus/v6/internal/server/operations"
"github.com/lxc/incus/v6/internal/server/project"
"github.com/lxc/incus/v6/internal/server/state"
"github.com/lxc/incus/v6/internal/server/task"
internalUtil "github.com/lxc/incus/v6/internal/util"
"github.com/lxc/incus/v6/shared/logger"
)
// This task function expires logs when executed. It's started by the Daemon
// and will run once every 24h.
func expireLogsTask(state *state.State) (task.Func, task.Schedule) {
f := func(ctx context.Context) {
opRun := func(op *operations.Operation) error {
return expireLogs(ctx, state)
}
op, err := operations.OperationCreate(state, "", operations.OperationClassTask, operationtype.LogsExpire, nil, nil, opRun, nil, nil, nil)
if err != nil {
logger.Error("Failed creating log files expiry operation", logger.Ctx{"err": err})
return
}
logger.Info("Expiring log files")
err = op.Start()
if err != nil {
logger.Error("Failed starting log files expiry operation", logger.Ctx{"err": err})
return
}
err = op.Wait(ctx)
if err != nil {
logger.Error("Failed expiring log files", logger.Ctx{"err": err})
return
}
logger.Info("Done expiring log files")
}
return f, task.Daily()
}
func expireLogs(ctx context.Context, state *state.State) error {
// List the instances.
instances, err := instance.LoadNodeAll(state, instancetype.Any)
if err != nil {
return err
}
// List the directory.
entries, err := os.ReadDir(state.OS.LogDir)
if err != nil {
return err
}
// Build the expected names.
names := []string{}
for _, inst := range instances {
names = append(names, project.Instance(inst.Project().Name, inst.Name()))
}
newestFile := func(path string, dir os.FileInfo) time.Time {
newest := dir.ModTime()
entries, err := os.ReadDir(path)
if err != nil {
return newest
}
for _, entry := range entries {
info, err := entry.Info()
if err != nil {
continue
}
if info.ModTime().After(newest) {
newest = info.ModTime()
}
}
return newest
}
for _, entry := range entries {
// At each iteration we check if we got cancelled in the meantime.
select {
case <-ctx.Done():
return nil
default:
}
// We only care about instance directories.
if !entry.IsDir() {
continue
}
// Skip if we are unable to read the file info, e.g. the file might
// be deleted.
fi, err := entry.Info()
if err != nil {
continue
}
// Check if the instance still exists.
if slices.Contains(names, fi.Name()) {
instDirEntries, err := os.ReadDir(internalUtil.LogPath(fi.Name()))
if err != nil {
return err
}
for _, instDirEntry := range instDirEntries {
path := internalUtil.LogPath(fi.Name(), instDirEntry.Name())
instInfo, err := instDirEntry.Info()
if err != nil {
continue
}
// Deal with directories (snapshots).
if instInfo.IsDir() {
newest := newestFile(path, instInfo)
if time.Since(newest).Hours() >= 48 {
err := os.RemoveAll(path)
if err != nil {
return err
}
}
continue
}
// Only remove old log files (keep other files, such as conf, pid, monitor etc).
if strings.HasSuffix(instInfo.Name(), ".log") || strings.HasSuffix(instInfo.Name(), ".log.old") {
// Remove any log file which wasn't modified in the past 48 hours.
if time.Since(instInfo.ModTime()).Hours() >= 48 {
err := os.Remove(path)
if err != nil {
return err
}
}
}
}
} else {
// Empty directory if unchanged in the past 24 hours.
path := internalUtil.LogPath(fi.Name())
newest := newestFile(path, fi)
if time.Since(newest).Hours() >= 24 {
err := os.RemoveAll(path)
if err != nil {
return err
}
}
}
}
return nil
}
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