From daa39c2689c90453db5ea9799e1cd7b012cdeb72 Mon Sep 17 00:00:00 2001 From: Matt Butcher Date: Fri, 17 Mar 2017 21:34:33 -0600 Subject: [PATCH] feat(helm): add --reuse-values flag to upgrade This makes it possible to re-use the existing values on an upgrade, merging in any new values set by `-f` or `--set`. Closes #1876 --- _proto/hapi/services/tiller.proto | 3 + cmd/helm/upgrade.go | 3 + cmd/helm/upgrade_test.go | 7 ++ pkg/helm/client.go | 1 + pkg/helm/option.go | 9 ++ pkg/proto/hapi/services/tiller.pb.go | 152 ++++++++++++++------------- pkg/tiller/release_server.go | 31 +++++- pkg/tiller/release_server_test.go | 67 +++++++++++- 8 files changed, 194 insertions(+), 79 deletions(-) diff --git a/_proto/hapi/services/tiller.proto b/_proto/hapi/services/tiller.proto index f47a47f14..f16d68238 100644 --- a/_proto/hapi/services/tiller.proto +++ b/_proto/hapi/services/tiller.proto @@ -203,6 +203,9 @@ message UpdateReleaseRequest { // wait, if true, will wait until all Pods, PVCs, and Services are in a ready state // before marking the release as successful. It will wait for as long as timeout bool wait = 9; + // ReuseValues will cause Tiller to reuse the values from the last release. + // This is ignored if reset_values is set. + bool reuse_values = 10; } // UpdateReleaseResponse is the response to an update request. diff --git a/cmd/helm/upgrade.go b/cmd/helm/upgrade.go index 5261efb06..e50ec73d3 100644 --- a/cmd/helm/upgrade.go +++ b/cmd/helm/upgrade.go @@ -72,6 +72,7 @@ type upgradeCmd struct { version string timeout int64 resetValues bool + reuseValues bool wait bool } @@ -114,6 +115,7 @@ func newUpgradeCmd(client helm.Interface, out io.Writer) *cobra.Command { f.StringVar(&upgrade.version, "version", "", "specify the exact chart version to use. If this is not specified, the latest version is used") f.Int64Var(&upgrade.timeout, "timeout", 300, "time in seconds to wait for any individual kubernetes operation (like Jobs for hooks)") f.BoolVar(&upgrade.resetValues, "reset-values", false, "when upgrading, reset the values to the ones built into the chart") + f.BoolVar(&upgrade.reuseValues, "reuse-values", false, "when upgrading, reuse the last release's values, and merge in any new values. If '--reset-values' is specified, this is ignored.") f.BoolVar(&upgrade.wait, "wait", false, "if set, will wait until all Pods, PVCs, and Services are in a ready state before marking the release as successful. It will wait for as long as --timeout") f.MarkDeprecated("disable-hooks", "use --no-hooks instead") @@ -177,6 +179,7 @@ func (u *upgradeCmd) run() error { helm.UpgradeDisableHooks(u.disableHooks), helm.UpgradeTimeout(u.timeout), helm.ResetValues(u.resetValues), + helm.ReuseValues(u.reuseValues), helm.UpgradeWait(u.wait)) if err != nil { return fmt.Errorf("UPGRADE FAILED: %v", prettyError(err)) diff --git a/cmd/helm/upgrade_test.go b/cmd/helm/upgrade_test.go index 2ae4abb25..a913016e2 100644 --- a/cmd/helm/upgrade_test.go +++ b/cmd/helm/upgrade_test.go @@ -109,6 +109,13 @@ func TestUpgradeCmd(t *testing.T) { resp: releaseMock(&releaseOptions{name: "funny-bunny", version: 4, chart: ch2}), expected: "Release \"funny-bunny\" has been upgraded. Happy Helming!\n", }, + { + name: "upgrade a release with --reuse-values", + args: []string{"funny-bunny", chartPath}, + flags: []string{"--reuse-values", "true"}, + resp: releaseMock(&releaseOptions{name: "funny-bunny", version: 5, chart: ch2}), + expected: "Release \"funny-bunny\" has been upgraded. Happy Helming!\n", + }, { name: "install a release with 'upgrade --install'", args: []string{"zany-bunny", chartPath}, diff --git a/pkg/helm/client.go b/pkg/helm/client.go index 2e773cca7..d66895596 100644 --- a/pkg/helm/client.go +++ b/pkg/helm/client.go @@ -155,6 +155,7 @@ func (h *Client) UpdateReleaseFromChart(rlsName string, chart *chart.Chart, opts req.DisableHooks = h.opts.disableHooks req.Recreate = h.opts.recreate req.ResetValues = h.opts.resetValues + req.ReuseValues = h.opts.reuseValues ctx := NewContext() if h.opts.before != nil { diff --git a/pkg/helm/option.go b/pkg/helm/option.go index 3853133ef..9dadafd11 100644 --- a/pkg/helm/option.go +++ b/pkg/helm/option.go @@ -66,6 +66,8 @@ type options struct { histReq rls.GetHistoryRequest // resetValues instructs Tiller to reset values to their defaults. resetValues bool + // reuseValues instructs Tiller to reuse the values from the last release. + reuseValues bool // release test options are applied directly to the test release history request testReq rls.TestReleaseRequest } @@ -323,6 +325,13 @@ func ResetValues(reset bool) UpdateOption { } } +// ReuseValues will (if true) trigger resetting the values to their original state. +func ReuseValues(reuse bool) UpdateOption { + return func(opts *options) { + opts.reuseValues = reuse + } +} + // UpgradeRecreate will (if true) recreate pods after upgrade. func UpgradeRecreate(recreate bool) UpdateOption { return func(opts *options) { diff --git a/pkg/proto/hapi/services/tiller.pb.go b/pkg/proto/hapi/services/tiller.pb.go index 4e772dd0d..8d2873741 100644 --- a/pkg/proto/hapi/services/tiller.pb.go +++ b/pkg/proto/hapi/services/tiller.pb.go @@ -259,6 +259,9 @@ type UpdateReleaseRequest struct { // wait, if true, will wait until all Pods, PVCs, and Services are in a ready state // before marking the release as successful. It will wait for as long as timeout Wait bool `protobuf:"varint,9,opt,name=wait" json:"wait,omitempty"` + // ReuseValues will cause Tiller to reuse the values from the last release. + // This is ignored if reset_values is set. + ReuseValues bool `protobuf:"varint,10,opt,name=reuse_values,json=reuseValues" json:"reuse_values,omitempty"` } func (m *UpdateReleaseRequest) Reset() { *m = UpdateReleaseRequest{} } @@ -996,78 +999,79 @@ var _ReleaseService_serviceDesc = grpc.ServiceDesc{ func init() { proto.RegisterFile("hapi/services/tiller.proto", fileDescriptor0) } var fileDescriptor0 = []byte{ - // 1162 bytes of a gzipped FileDescriptorProto - 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x9c, 0x57, 0xdd, 0x6e, 0xe3, 0xc4, - 0x17, 0xaf, 0xe3, 0x7c, 0x9e, 0x76, 0xfb, 0x4f, 0xa7, 0x5f, 0xae, 0xf5, 0x07, 0x15, 0x23, 0x68, - 0x76, 0x61, 0x53, 0x08, 0x57, 0x48, 0x08, 0xa9, 0xdb, 0x8d, 0xda, 0x42, 0xe9, 0x4a, 0xce, 0x76, - 0x91, 0x10, 0x22, 0x72, 0x93, 0x49, 0x6b, 0xd6, 0xf1, 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0x00, } diff --git a/pkg/tiller/release_server.go b/pkg/tiller/release_server.go index 873d2335a..a8d5594c3 100644 --- a/pkg/tiller/release_server.go +++ b/pkg/tiller/release_server.go @@ -354,13 +354,33 @@ func (s *ReleaseServer) performUpdate(originalRelease, updatedRelease *release.R // // This is skipped if the req.ResetValues flag is set, in which case the // request values are not altered. -func (s *ReleaseServer) reuseValues(req *services.UpdateReleaseRequest, current *release.Release) { +func (s *ReleaseServer) reuseValues(req *services.UpdateReleaseRequest, current *release.Release) error { if req.ResetValues { // If ResetValues is set, we comletely ignore current.Config. log.Print("Reset values to the chart's original version.") - return + return nil } - // If req.Values is empty, but current. config is not, copy current into the + + // If the ReuseValues flag is set, we always copy the old values over the new config's values. + if req.ReuseValues { + log.Print("Reusing the old release's values") + + // We have to regenerate the old coalesced values: + oldVals, err := chartutil.CoalesceValues(current.Chart, current.Config) + if err != nil { + err := fmt.Errorf("failed to rebuild old values: %s", err) + log.Print(err) + return err + } + nv, err := oldVals.YAML() + if err != nil { + return err + } + req.Chart.Values = &chart.Config{Raw: nv} + return nil + } + + // If req.Values is empty, but current.Config is not, copy current into the // request. if (req.Values == nil || req.Values.Raw == "" || req.Values.Raw == "{}\n") && current.Config != nil && @@ -369,6 +389,7 @@ func (s *ReleaseServer) reuseValues(req *services.UpdateReleaseRequest, current log.Printf("Copying values from %s (v%d) to new release.", current.Name, current.Version) req.Values = current.Config } + return nil } // prepareUpdate builds an updated release for an update operation. @@ -388,7 +409,9 @@ func (s *ReleaseServer) prepareUpdate(req *services.UpdateReleaseRequest) (*rele } // If new values were not supplied in the upgrade, re-use the existing values. - s.reuseValues(req, currentRelease) + if err := s.reuseValues(req, currentRelease); err != nil { + return nil, nil, err + } // Increment revision count. This is passed to templates, and also stored on // the release object. diff --git a/pkg/tiller/release_server_test.go b/pkg/tiller/release_server_test.go index 185ef05e7..d4e47a07f 100644 --- a/pkg/tiller/release_server_test.go +++ b/pkg/tiller/release_server_test.go @@ -717,7 +717,7 @@ func TestUpdateRelease(t *testing.T) { t.Errorf("Expected description %q, got %q", edesc, got) } } -func TestUpdateReleaseResetValues(t *testing.T) { +func TestUpdateRelease_ResetValues(t *testing.T) { c := helm.NewContext() rs := rsFixture() rel := releaseStub() @@ -744,6 +744,71 @@ func TestUpdateReleaseResetValues(t *testing.T) { } } +func TestUpdateRelease_ReuseValues(t *testing.T) { + c := helm.NewContext() + rs := rsFixture() + rel := releaseStub() + rs.env.Releases.Create(rel) + + req := &services.UpdateReleaseRequest{ + Name: rel.Name, + Chart: &chart.Chart{ + Metadata: &chart.Metadata{Name: "hello"}, + Templates: []*chart.Template{ + {Name: "templates/hello", Data: []byte("hello: world")}, + {Name: "templates/hooks", Data: []byte(manifestWithUpgradeHooks)}, + }, + // Since reuseValues is set, this should get ignored. + Values: &chart.Config{Raw: "foo: bar\n"}, + }, + Values: &chart.Config{Raw: "name2: val2"}, + ReuseValues: true, + } + res, err := rs.UpdateRelease(c, req) + if err != nil { + t.Fatalf("Failed updated: %s", err) + } + // This should have been overwritten with the old value. + expect := "name: value\n" + if res.Release.Chart.Values != nil && res.Release.Chart.Values.Raw != expect { + t.Errorf("Expected chart values to be %q, got %q", expect, res.Release.Chart.Values.Raw) + } + // This should have the newly-passed overrides. + expect = "name2: val2" + if res.Release.Config != nil && res.Release.Config.Raw != expect { + t.Errorf("Expected request config to be %q, got %q", expect, res.Release.Config.Raw) + } +} + +func TestUpdateRelease_ResetReuseValues(t *testing.T) { + // This verifies that when both reset and reuse are set, reset wins. + c := helm.NewContext() + rs := rsFixture() + rel := releaseStub() + rs.env.Releases.Create(rel) + + req := &services.UpdateReleaseRequest{ + Name: rel.Name, + Chart: &chart.Chart{ + Metadata: &chart.Metadata{Name: "hello"}, + Templates: []*chart.Template{ + {Name: "templates/hello", Data: []byte("hello: world")}, + {Name: "templates/hooks", Data: []byte(manifestWithUpgradeHooks)}, + }, + }, + ResetValues: true, + ReuseValues: true, + } + res, err := rs.UpdateRelease(c, req) + if err != nil { + t.Fatalf("Failed updated: %s", err) + } + // This should have been unset. Config: &chart.Config{Raw: `name: value`}, + if res.Release.Config != nil && res.Release.Config.Raw != "" { + t.Errorf("Expected chart config to be empty, got %q", res.Release.Config.Raw) + } +} + func TestUpdateReleaseFailure(t *testing.T) { c := helm.NewContext() rs := rsFixture()