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461 lines
11 KiB
461 lines
11 KiB
/*
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Copyright 2016 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package helm // import "k8s.io/helm/pkg/helm"
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import (
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"io"
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"time"
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"golang.org/x/net/context"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials"
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"google.golang.org/grpc/keepalive"
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"k8s.io/helm/pkg/chartutil"
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"k8s.io/helm/pkg/proto/hapi/chart"
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rls "k8s.io/helm/pkg/proto/hapi/services"
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)
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// Client manages client side of the Helm-Tiller protocol.
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type Client struct {
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opts options
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}
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// NewClient creates a new client.
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func NewClient(opts ...Option) *Client {
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var c Client
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return c.Option(opts...)
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}
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// Option configures the Helm client with the provided options.
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func (h *Client) Option(opts ...Option) *Client {
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for _, opt := range opts {
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opt(&h.opts)
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}
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return h
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}
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// ListReleases lists the current releases.
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func (h *Client) ListReleases(opts ...ReleaseListOption) (*rls.ListReleasesResponse, error) {
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for _, opt := range opts {
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opt(&h.opts)
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}
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req := &h.opts.listReq
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ctx := NewContext()
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if h.opts.before != nil {
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if err := h.opts.before(ctx, req); err != nil {
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return nil, err
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}
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}
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return h.list(ctx, req)
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}
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// InstallRelease loads a chart from chstr, installs it, and returns the release response.
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func (h *Client) InstallRelease(chstr, ns string, opts ...InstallOption) (*rls.InstallReleaseResponse, error) {
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// load the chart to install
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chart, err := chartutil.Load(chstr)
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if err != nil {
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return nil, err
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}
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return h.InstallReleaseFromChart(chart, ns, opts...)
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}
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// InstallReleaseFromChart installs a new chart and returns the release response.
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func (h *Client) InstallReleaseFromChart(chart *chart.Chart, ns string, opts ...InstallOption) (*rls.InstallReleaseResponse, error) {
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// apply the install options
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for _, opt := range opts {
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opt(&h.opts)
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}
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req := &h.opts.instReq
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req.Chart = chart
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req.Namespace = ns
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req.DryRun = h.opts.dryRun
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req.DisableHooks = h.opts.disableHooks
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req.ReuseName = h.opts.reuseName
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ctx := NewContext()
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if h.opts.before != nil {
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if err := h.opts.before(ctx, req); err != nil {
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return nil, err
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}
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}
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err := chartutil.ProcessRequirementsEnabled(req.Chart, req.Values)
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if err != nil {
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return nil, err
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}
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err = chartutil.ProcessRequirementsImportValues(req.Chart)
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if err != nil {
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return nil, err
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}
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return h.install(ctx, req)
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}
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// DeleteRelease uninstalls a named release and returns the response.
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func (h *Client) DeleteRelease(rlsName string, opts ...DeleteOption) (*rls.UninstallReleaseResponse, error) {
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// apply the uninstall options
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for _, opt := range opts {
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opt(&h.opts)
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}
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if h.opts.dryRun {
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// In the dry run case, just see if the release exists
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r, err := h.ReleaseContent(rlsName)
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if err != nil {
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return &rls.UninstallReleaseResponse{}, err
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}
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return &rls.UninstallReleaseResponse{Release: r.Release}, nil
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}
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req := &h.opts.uninstallReq
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req.Name = rlsName
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req.DisableHooks = h.opts.disableHooks
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ctx := NewContext()
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if h.opts.before != nil {
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if err := h.opts.before(ctx, req); err != nil {
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return nil, err
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}
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}
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return h.delete(ctx, req)
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}
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// UpdateRelease loads a chart from chstr and updates a release to a new/different chart.
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func (h *Client) UpdateRelease(rlsName string, chstr string, opts ...UpdateOption) (*rls.UpdateReleaseResponse, error) {
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// load the chart to update
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chart, err := chartutil.Load(chstr)
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if err != nil {
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return nil, err
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}
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return h.UpdateReleaseFromChart(rlsName, chart, opts...)
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}
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// UpdateReleaseFromChart updates a release to a new/different chart.
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func (h *Client) UpdateReleaseFromChart(rlsName string, chart *chart.Chart, opts ...UpdateOption) (*rls.UpdateReleaseResponse, error) {
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// apply the update options
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for _, opt := range opts {
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opt(&h.opts)
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}
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req := &h.opts.updateReq
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req.Chart = chart
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req.DryRun = h.opts.dryRun
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req.Name = rlsName
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req.DisableHooks = h.opts.disableHooks
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req.Recreate = h.opts.recreate
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req.Force = h.opts.force
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req.ResetValues = h.opts.resetValues
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req.ReuseValues = h.opts.reuseValues
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ctx := NewContext()
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if h.opts.before != nil {
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if err := h.opts.before(ctx, req); err != nil {
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return nil, err
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}
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}
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err := chartutil.ProcessRequirementsEnabled(req.Chart, req.Values)
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if err != nil {
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return nil, err
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}
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err = chartutil.ProcessRequirementsImportValues(req.Chart)
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if err != nil {
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return nil, err
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}
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return h.update(ctx, req)
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}
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// GetVersion returns the server version.
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func (h *Client) GetVersion(opts ...VersionOption) (*rls.GetVersionResponse, error) {
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for _, opt := range opts {
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opt(&h.opts)
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}
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req := &rls.GetVersionRequest{}
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ctx := NewContext()
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if h.opts.before != nil {
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if err := h.opts.before(ctx, req); err != nil {
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return nil, err
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}
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}
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return h.version(ctx, req)
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}
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// RollbackRelease rolls back a release to the previous version.
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func (h *Client) RollbackRelease(rlsName string, opts ...RollbackOption) (*rls.RollbackReleaseResponse, error) {
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for _, opt := range opts {
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opt(&h.opts)
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}
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req := &h.opts.rollbackReq
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req.Recreate = h.opts.recreate
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req.Force = h.opts.force
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req.DisableHooks = h.opts.disableHooks
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req.DryRun = h.opts.dryRun
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req.Name = rlsName
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ctx := NewContext()
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if h.opts.before != nil {
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if err := h.opts.before(ctx, req); err != nil {
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return nil, err
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}
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}
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return h.rollback(ctx, req)
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}
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// ReleaseStatus returns the given release's status.
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func (h *Client) ReleaseStatus(rlsName string, opts ...StatusOption) (*rls.GetReleaseStatusResponse, error) {
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for _, opt := range opts {
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opt(&h.opts)
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}
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req := &h.opts.statusReq
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req.Name = rlsName
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ctx := NewContext()
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if h.opts.before != nil {
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if err := h.opts.before(ctx, req); err != nil {
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return nil, err
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}
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}
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return h.status(ctx, req)
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}
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// ReleaseContent returns the configuration for a given release.
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func (h *Client) ReleaseContent(rlsName string, opts ...ContentOption) (*rls.GetReleaseContentResponse, error) {
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for _, opt := range opts {
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opt(&h.opts)
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}
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req := &h.opts.contentReq
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req.Name = rlsName
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ctx := NewContext()
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if h.opts.before != nil {
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if err := h.opts.before(ctx, req); err != nil {
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return nil, err
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}
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}
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return h.content(ctx, req)
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}
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// ReleaseHistory returns a release's revision history.
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func (h *Client) ReleaseHistory(rlsName string, opts ...HistoryOption) (*rls.GetHistoryResponse, error) {
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for _, opt := range opts {
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opt(&h.opts)
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}
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req := &h.opts.histReq
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req.Name = rlsName
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ctx := NewContext()
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if h.opts.before != nil {
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if err := h.opts.before(ctx, req); err != nil {
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return nil, err
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}
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}
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return h.history(ctx, req)
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}
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// RunReleaseTest executes a pre-defined test on a release.
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func (h *Client) RunReleaseTest(rlsName string, opts ...ReleaseTestOption) (<-chan *rls.TestReleaseResponse, <-chan error) {
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for _, opt := range opts {
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opt(&h.opts)
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}
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req := &h.opts.testReq
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req.Name = rlsName
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ctx := NewContext()
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return h.test(ctx, req)
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}
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// connect returns a gRPC connection to Tiller or error. The gRPC dial options
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// are constructed here.
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func (h *Client) connect(ctx context.Context) (conn *grpc.ClientConn, err error) {
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opts := []grpc.DialOption{
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grpc.WithTimeout(5 * time.Second),
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grpc.WithBlock(),
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grpc.WithKeepaliveParams(keepalive.ClientParameters{
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// Send keepalive every 30 seconds to prevent the connection from
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// getting closed by upstreams
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Time: time.Duration(30) * time.Second,
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}),
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}
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switch {
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case h.opts.useTLS:
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opts = append(opts, grpc.WithTransportCredentials(credentials.NewTLS(h.opts.tlsConfig)))
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default:
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opts = append(opts, grpc.WithInsecure())
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}
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if conn, err = grpc.Dial(h.opts.host, opts...); err != nil {
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return nil, err
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}
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return conn, nil
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}
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// Executes tiller.ListReleases RPC.
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func (h *Client) list(ctx context.Context, req *rls.ListReleasesRequest) (*rls.ListReleasesResponse, error) {
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c, err := h.connect(ctx)
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if err != nil {
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return nil, err
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}
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defer c.Close()
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rlc := rls.NewReleaseServiceClient(c)
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s, err := rlc.ListReleases(ctx, req)
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if err != nil {
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return nil, err
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}
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return s.Recv()
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}
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// Executes tiller.InstallRelease RPC.
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func (h *Client) install(ctx context.Context, req *rls.InstallReleaseRequest) (*rls.InstallReleaseResponse, error) {
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c, err := h.connect(ctx)
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if err != nil {
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return nil, err
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}
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defer c.Close()
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rlc := rls.NewReleaseServiceClient(c)
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return rlc.InstallRelease(ctx, req)
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}
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// Executes tiller.UninstallRelease RPC.
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func (h *Client) delete(ctx context.Context, req *rls.UninstallReleaseRequest) (*rls.UninstallReleaseResponse, error) {
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c, err := h.connect(ctx)
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if err != nil {
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return nil, err
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}
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defer c.Close()
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rlc := rls.NewReleaseServiceClient(c)
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return rlc.UninstallRelease(ctx, req)
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}
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// Executes tiller.UpdateRelease RPC.
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func (h *Client) update(ctx context.Context, req *rls.UpdateReleaseRequest) (*rls.UpdateReleaseResponse, error) {
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c, err := h.connect(ctx)
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if err != nil {
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return nil, err
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}
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defer c.Close()
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rlc := rls.NewReleaseServiceClient(c)
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return rlc.UpdateRelease(ctx, req)
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}
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// Executes tiller.RollbackRelease RPC.
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func (h *Client) rollback(ctx context.Context, req *rls.RollbackReleaseRequest) (*rls.RollbackReleaseResponse, error) {
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c, err := h.connect(ctx)
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if err != nil {
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return nil, err
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}
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defer c.Close()
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rlc := rls.NewReleaseServiceClient(c)
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return rlc.RollbackRelease(ctx, req)
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}
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// Executes tiller.GetReleaseStatus RPC.
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func (h *Client) status(ctx context.Context, req *rls.GetReleaseStatusRequest) (*rls.GetReleaseStatusResponse, error) {
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c, err := h.connect(ctx)
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if err != nil {
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return nil, err
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}
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defer c.Close()
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rlc := rls.NewReleaseServiceClient(c)
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return rlc.GetReleaseStatus(ctx, req)
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}
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// Executes tiller.GetReleaseContent RPC.
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func (h *Client) content(ctx context.Context, req *rls.GetReleaseContentRequest) (*rls.GetReleaseContentResponse, error) {
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c, err := h.connect(ctx)
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if err != nil {
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return nil, err
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}
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defer c.Close()
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rlc := rls.NewReleaseServiceClient(c)
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return rlc.GetReleaseContent(ctx, req)
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}
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// Executes tiller.GetVersion RPC.
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func (h *Client) version(ctx context.Context, req *rls.GetVersionRequest) (*rls.GetVersionResponse, error) {
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c, err := h.connect(ctx)
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if err != nil {
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return nil, err
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}
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defer c.Close()
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rlc := rls.NewReleaseServiceClient(c)
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return rlc.GetVersion(ctx, req)
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}
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// Executes tiller.GetHistory RPC.
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func (h *Client) history(ctx context.Context, req *rls.GetHistoryRequest) (*rls.GetHistoryResponse, error) {
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c, err := h.connect(ctx)
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if err != nil {
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return nil, err
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}
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defer c.Close()
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rlc := rls.NewReleaseServiceClient(c)
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return rlc.GetHistory(ctx, req)
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}
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// Executes tiller.TestRelease RPC.
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func (h *Client) test(ctx context.Context, req *rls.TestReleaseRequest) (<-chan *rls.TestReleaseResponse, <-chan error) {
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errc := make(chan error, 1)
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c, err := h.connect(ctx)
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if err != nil {
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errc <- err
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return nil, errc
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}
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ch := make(chan *rls.TestReleaseResponse, 1)
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go func() {
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defer close(errc)
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defer close(ch)
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defer c.Close()
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rlc := rls.NewReleaseServiceClient(c)
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s, err := rlc.RunReleaseTest(ctx, req)
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if err != nil {
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errc <- err
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return
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}
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for {
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msg, err := s.Recv()
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if err == io.EOF {
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return
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}
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if err != nil {
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errc <- err
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return
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}
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ch <- msg
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}
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}()
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return ch, errc
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}
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