mirror of
https://github.com/offen/docker-volume-backup.git
synced 2024-11-24 22:20:28 +01:00
fix lockfile mechanism
This commit is contained in:
parent
b1c4bee85d
commit
2469597848
@ -18,6 +18,7 @@ import (
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"github.com/docker/docker/api/types/filters"
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"github.com/docker/docker/api/types/swarm"
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"github.com/docker/docker/client"
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"github.com/gofrs/flock"
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"github.com/joho/godotenv"
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"github.com/leekchan/timeutil"
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minio "github.com/minio/minio-go/v7"
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@ -228,7 +229,10 @@ func (s *script) stopContainersAndRun(thunk func() error) error {
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err,
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)
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}
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s.logger.Infof("Restarted %d container(s) and the matching service(s).", len(stoppedContainers))
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s.logger.Infof(
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"Restarted %d container(s) and the matching service(s).",
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len(stoppedContainers),
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)
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return nil
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}()
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@ -356,7 +360,10 @@ func (s *script) pruneOldBackups() error {
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for candidate := range candidates {
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lenCandidates++
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if candidate.Err != nil {
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return fmt.Errorf("pruneOldBackups: error looking up candidates from remote storage: %w", candidate.Err)
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return fmt.Errorf(
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"pruneOldBackups: error looking up candidates from remote storage: %w",
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candidate.Err,
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)
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}
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if candidate.LastModified.Before(deadline) {
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matches = append(matches, candidate)
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@ -393,9 +400,10 @@ func (s *script) pruneOldBackups() error {
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)
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} else if len(matches) != 0 && len(matches) == lenCandidates {
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s.logger.Warnf(
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"The current configuration would delete all %d remote backup copies. Refusing to do so, please check your configuration.",
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"The current configuration would delete all %d remote backup copies.",
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len(matches),
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)
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s.logger.Warn("Refusing to do so, please check your configuration.")
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} else {
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s.logger.Infof("None of %d remote backup(s) were pruned.", lenCandidates)
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}
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@ -448,9 +456,10 @@ func (s *script) pruneOldBackups() error {
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)
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} else if len(matches) != 0 && len(matches) == len(candidates) {
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s.logger.Warnf(
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"The current configuration would delete all %d local backup copies. Refusing to do so, please check your configuration.",
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"The current configuration would delete all %d local backup copies.",
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len(matches),
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)
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s.logger.Warn("Refusing to do so, please check your configuration.")
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} else {
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s.logger.Infof("None of %d local backup(s) were pruned.", len(candidates))
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}
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@ -472,19 +481,15 @@ func (s *script) must(err error) {
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// caller invokes the returned release func. When invoked while the file is
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// still locked the function panics.
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func lock(lockfile string) func() error {
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lf, err := os.OpenFile(lockfile, os.O_CREATE|os.O_RDWR, os.ModeAppend)
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fileLock := flock.New(lockfile)
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acquired, err := fileLock.TryLock()
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if err != nil {
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panic(err)
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}
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return func() error {
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if err := lf.Close(); err != nil {
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return fmt.Errorf("lock: error releasing file lock: %w", err)
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}
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if err := os.Remove(lockfile); err != nil {
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return fmt.Errorf("lock: error removing lock file: %w", err)
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}
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return nil
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if !acquired {
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panic("unable to acquire file lock")
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}
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return fileLock.Unlock
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}
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// copy creates a copy of the file located at `dst` at `src`.
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1
go.mod
1
go.mod
@ -4,6 +4,7 @@ go 1.17
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require (
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github.com/docker/docker v20.10.8+incompatible
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github.com/gofrs/flock v0.8.1
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github.com/joho/godotenv v1.3.0
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github.com/leekchan/timeutil v0.0.0-20150802142658-28917288c48d
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github.com/minio/minio-go/v7 v7.0.12
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5
go.sum
5
go.sum
@ -274,6 +274,8 @@ github.com/godbus/dbus v0.0.0-20180201030542-885f9cc04c9c/go.mod h1:/YcGZj5zSblf
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github.com/godbus/dbus v0.0.0-20190422162347-ade71ed3457e/go.mod h1:bBOAhwG1umN6/6ZUMtDFBMQR8jRg9O75tm9K00oMsK4=
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github.com/godbus/dbus/v5 v5.0.3/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
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github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
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github.com/gofrs/flock v0.8.1 h1:+gYjHKf32LDeiEEFhQaotPbLuUXjY5ZqxKgXy7n59aw=
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github.com/gofrs/flock v0.8.1/go.mod h1:F1TvTiK9OcQqauNUHlbJvyl9Qa1QvF/gOUDKA14jxHU=
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github.com/gogo/googleapis v1.2.0/go.mod h1:Njal3psf3qN6dwBtQfUmBZh2ybovJ0tlu3o/AC7HYjU=
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github.com/gogo/googleapis v1.4.0/go.mod h1:5YRNX2z1oM5gXdAkurHa942MDgEJyk02w4OecKY87+c=
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github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
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@ -397,9 +399,11 @@ github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxv
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github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
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github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
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github.com/kr/pretty v0.2.0/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
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github.com/kr/pretty v0.2.1 h1:Fmg33tUaq4/8ym9TJN1x7sLJnHVwhP33CNkpYV/7rwI=
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github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
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github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
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github.com/kr/pty v1.1.5/go.mod h1:9r2w37qlBe7rQ6e1fg1S/9xpWHSnaqNdHD3WcMdbPDA=
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github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
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github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
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github.com/leekchan/timeutil v0.0.0-20150802142658-28917288c48d h1:2puqoOQwi3Ai1oznMOsFIbifm6kIfJaLLyYzWD4IzTs=
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github.com/leekchan/timeutil v0.0.0-20150802142658-28917288c48d/go.mod h1:hO90vCP2x3exaSH58BIAowSKvV+0OsY21TtzuFGHON4=
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@ -907,6 +911,7 @@ gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLks
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gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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gopkg.in/check.v1 v1.0.0-20141024133853-64131543e789/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
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gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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gopkg.in/cheggaaa/pb.v1 v1.0.25/go.mod h1:V/YB90LKu/1FcN3WVnfiiE5oMCibMjukxqG/qStrOgw=
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gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
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