501 lines
13 KiB
Go
501 lines
13 KiB
Go
package main
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import (
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"fmt"
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"io"
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"log"
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"os"
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"os/signal"
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"strings"
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"syscall"
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"github.com/roboll/helmfile/helmexec"
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"github.com/roboll/helmfile/state"
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"github.com/urfave/cli"
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"path/filepath"
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"sort"
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)
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const (
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DefaultHelmfile = "helmfile.yaml"
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DeprecatedHelmfile = "charts.yaml"
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DefaultHelmfileDirectory = "helmfile.d"
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)
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var Version string
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func main() {
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app := cli.NewApp()
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app.Name = "helmfile"
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app.Usage = ""
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app.Version = Version
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app.Flags = []cli.Flag{
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cli.StringFlag{
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Name: "helm-binary, b",
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Usage: "path to helm binary",
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},
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cli.StringFlag{
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Name: "file, f",
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Usage: "load config from file or directory. defaults to `helmfile.yaml` or `helmfile.d`(means `helmfile.d/*.yaml`) in this preference",
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},
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cli.BoolFlag{
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Name: "quiet, q",
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Usage: "silence output",
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},
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cli.StringFlag{
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Name: "kube-context",
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Usage: "Set kubectl context. Uses current context by default",
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},
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cli.StringFlag{
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Name: "namespace, n",
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Usage: "Set namespace. Uses the namespace set in the context by default",
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},
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cli.StringSliceFlag{
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Name: "selector, l",
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Usage: `Only run using the releases that match labels. Labels can take the form of foo=bar or foo!=bar.
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A release must match all labels in a group in order to be used. Multiple groups can be specified at once.
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--selector tier=frontend,tier!=proxy --selector tier=backend. Will match all frontend, non-proxy releases AND all backend releases.
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The name of a release can be used as a label. --selector name=myrelease`,
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},
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}
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app.Commands = []cli.Command{
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{
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Name: "repos",
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Usage: "sync repositories from state file (helm repo add && helm repo update)",
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Flags: []cli.Flag{
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cli.StringFlag{
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Name: "args",
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Value: "",
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Usage: "pass args to helm exec",
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},
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},
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Action: func(c *cli.Context) error {
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return eachDesiredStateDo(c, func(state *state.HelmState, helm helmexec.Interface) []error {
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args := getArgs(c, state)
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if len(args) > 0 {
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helm.SetExtraArgs(args...)
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}
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if c.GlobalString("helm-binary") != "" {
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helm.SetHelmBinary(c.GlobalString("helm-binary"))
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}
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return state.SyncRepos(helm)
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})
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},
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},
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{
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Name: "charts",
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Usage: "sync charts from state file (helm upgrade --install)",
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Flags: []cli.Flag{
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cli.StringFlag{
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Name: "args",
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Value: "",
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Usage: "pass args to helm exec",
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},
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cli.StringSliceFlag{
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Name: "values",
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Usage: "additional value files to be merged into the command",
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},
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cli.IntFlag{
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Name: "concurrency",
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Value: 0,
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Usage: "maximum number of concurrent helm processes to run, 0 is unlimited",
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},
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},
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Action: func(c *cli.Context) error {
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return eachDesiredStateDo(c, func(state *state.HelmState, helm helmexec.Interface) []error {
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args := getArgs(c, state)
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if len(args) > 0 {
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helm.SetExtraArgs(args...)
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}
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if c.GlobalString("helm-binary") != "" {
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helm.SetHelmBinary(c.GlobalString("helm-binary"))
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}
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values := c.StringSlice("values")
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workers := c.Int("concurrency")
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return state.SyncReleases(helm, values, workers)
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})
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},
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},
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{
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Name: "diff",
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Usage: "diff charts from state file against env (helm diff)",
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Flags: []cli.Flag{
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cli.StringFlag{
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Name: "args",
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Value: "",
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Usage: "pass args to helm exec",
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},
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cli.StringSliceFlag{
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Name: "values",
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Usage: "additional value files to be merged into the command",
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},
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cli.BoolFlag{
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Name: "sync-repos",
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Usage: "enable a repo sync prior to diffing",
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},
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cli.IntFlag{
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Name: "concurrency",
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Value: 0,
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Usage: "maximum number of concurrent helm processes to run, 0 is unlimited",
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},
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},
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Action: func(c *cli.Context) error {
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return eachDesiredStateDo(c, func(state *state.HelmState, helm helmexec.Interface) []error {
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args := getArgs(c, state)
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if len(args) > 0 {
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helm.SetExtraArgs(args...)
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}
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if c.GlobalString("helm-binary") != "" {
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helm.SetHelmBinary(c.GlobalString("helm-binary"))
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}
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if c.Bool("sync-repos") {
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if errs := state.SyncRepos(helm); errs != nil && len(errs) > 0 {
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return errs
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}
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}
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values := c.StringSlice("values")
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workers := c.Int("concurrency")
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return state.DiffReleases(helm, values, workers)
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})
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},
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},
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{
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Name: "lint",
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Usage: "lint charts from state file (helm lint)",
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Flags: []cli.Flag{
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cli.StringFlag{
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Name: "args",
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Value: "",
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Usage: "pass args to helm exec",
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},
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cli.StringSliceFlag{
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Name: "values",
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Usage: "additional value files to be merged into the command",
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},
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cli.IntFlag{
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Name: "concurrency",
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Value: 0,
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Usage: "maximum number of concurrent helm processes to run, 0 is unlimited",
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},
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},
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Action: func(c *cli.Context) error {
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return eachDesiredStateDo(c, func(state *state.HelmState, helm helmexec.Interface) []error {
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args := c.String("args")
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if len(args) > 0 {
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helm.SetExtraArgs(strings.Split(args, " ")...)
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}
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if c.GlobalString("helm-binary") != "" {
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helm.SetHelmBinary(c.GlobalString("helm-binary"))
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}
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values := c.StringSlice("values")
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workers := c.Int("concurrency")
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return state.LintReleases(helm, values, workers)
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})
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},
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},
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{
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Name: "sync",
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Usage: "sync all resources from state file (repos, charts and local chart deps)",
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Flags: []cli.Flag{
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cli.StringSliceFlag{
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Name: "values",
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Usage: "additional value files to be merged into the command",
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},
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cli.IntFlag{
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Name: "concurrency",
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Value: 0,
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Usage: "maximum number of concurrent helm processes to run, 0 is unlimited",
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},
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cli.StringFlag{
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Name: "args",
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Value: "",
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Usage: "pass args to helm exec",
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},
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},
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Action: func(c *cli.Context) error {
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return eachDesiredStateDo(c, func(state *state.HelmState, helm helmexec.Interface) []error {
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if errs := state.SyncRepos(helm); errs != nil && len(errs) > 0 {
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return errs
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}
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if errs := state.UpdateDeps(helm); errs != nil && len(errs) > 0 {
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return errs
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}
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args := getArgs(c, state)
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if len(args) > 0 {
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helm.SetExtraArgs(args...)
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}
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if c.GlobalString("helm-binary") != "" {
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helm.SetHelmBinary(c.GlobalString("helm-binary"))
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}
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values := c.StringSlice("values")
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workers := c.Int("concurrency")
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return state.SyncReleases(helm, values, workers)
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})
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},
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},
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{
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Name: "status",
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Usage: "retrieve status of releases in state file",
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Flags: []cli.Flag{
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cli.IntFlag{
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Name: "concurrency",
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Value: 0,
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Usage: "maximum number of concurrent helm processes to run, 0 is unlimited",
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},
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cli.StringFlag{
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Name: "args",
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Value: "",
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Usage: "pass args to helm exec",
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},
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},
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Action: func(c *cli.Context) error {
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return eachDesiredStateDo(c, func(state *state.HelmState, helm helmexec.Interface) []error {
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workers := c.Int("concurrency")
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args := getArgs(c, state)
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if len(args) > 0 {
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helm.SetExtraArgs(args...)
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}
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if c.GlobalString("helm-binary") != "" {
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helm.SetHelmBinary(c.GlobalString("helm-binary"))
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}
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return state.ReleaseStatuses(helm, workers)
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})
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},
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},
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{
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Name: "delete",
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Usage: "delete releases from state file (helm delete)",
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Flags: []cli.Flag{
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cli.BoolFlag{
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Name: "purge",
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Usage: "purge releases i.e. free release names and histories",
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},
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},
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Action: func(c *cli.Context) error {
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return eachDesiredStateDo(c, func(state *state.HelmState, helm helmexec.Interface) []error {
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purge := c.Bool("purge")
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if c.GlobalString("helm-binary") != "" {
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helm.SetHelmBinary(c.GlobalString("helm-binary"))
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}
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return state.DeleteReleases(helm, purge)
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})
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},
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},
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{
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Name: "test",
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Usage: "test releases from state file (helm test)",
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Flags: []cli.Flag{
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cli.BoolFlag{
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Name: "cleanup",
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Usage: "delete test pods upon completion",
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},
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cli.StringFlag{
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Name: "args",
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Value: "",
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Usage: "pass additional args to helm exec",
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},
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cli.IntFlag{
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Name: "timeout",
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Value: 300,
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Usage: "maximum time for tests to run before being considered failed",
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},
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},
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Action: func(c *cli.Context) error {
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return eachDesiredStateDo(c, func(state *state.HelmState, helm helmexec.Interface) []error {
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cleanup := c.Bool("cleanup")
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timeout := c.Int("timeout")
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args := getArgs(c, state)
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if len(args) > 0 {
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helm.SetExtraArgs(args...)
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}
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if c.GlobalString("helm-binary") != "" {
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helm.SetHelmBinary(c.GlobalString("helm-binary"))
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}
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return state.TestReleases(helm, cleanup, timeout)
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})
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},
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},
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}
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err := app.Run(os.Args)
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if err != nil {
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log.Printf("err: %s", err.Error())
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os.Exit(1)
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}
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}
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func eachDesiredStateDo(c *cli.Context, converge func(*state.HelmState, helmexec.Interface) []error) error {
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fileOrDirPath := c.GlobalString("file")
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desiredStateFiles, err := findDesiredStateFiles(fileOrDirPath)
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if err != nil {
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return err
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}
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for _, f := range desiredStateFiles {
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state, helm, err := loadDesiredStateFromFile(c, f)
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if err != nil {
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return err
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}
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errs := converge(state, helm)
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if err := clean(state, errs); err != nil {
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return err
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}
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}
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return nil
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}
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func findDesiredStateFiles(specifiedPath string) ([]string, error) {
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var helmfileDir string
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if specifiedPath != "" {
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if fileExistsAt(specifiedPath) {
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return []string{specifiedPath}, nil
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} else if directoryExistsAt(specifiedPath) {
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helmfileDir = specifiedPath
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} else {
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return []string{}, fmt.Errorf("specified state file %s is not found", specifiedPath)
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}
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} else {
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var defaultFile string
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if fileExistsAt(DefaultHelmfile) {
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defaultFile = DefaultHelmfile
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} else if fileExistsAt(DeprecatedHelmfile) {
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log.Printf(
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"warn: %s is being loaded: %s is deprecated in favor of %s. See https://github.com/roboll/helmfile/issues/25 for more information",
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DeprecatedHelmfile,
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DeprecatedHelmfile,
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DefaultHelmfile,
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)
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defaultFile = DeprecatedHelmfile
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}
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if directoryExistsAt(DefaultHelmfileDirectory) {
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if defaultFile != "" {
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return []string{}, fmt.Errorf("configuration conlict error: you can have either %s or %s, but not both", defaultFile, DefaultHelmfileDirectory)
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}
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helmfileDir = DefaultHelmfileDirectory
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} else if defaultFile != "" {
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return []string{defaultFile}, nil
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} else {
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return []string{}, fmt.Errorf("no state file found. It must be named %s/*.yaml, %s, or %s, or otherwise specified with the --file flag", DefaultHelmfileDirectory, DefaultHelmfile, DeprecatedHelmfile)
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}
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}
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files, err := filepath.Glob(filepath.Join(helmfileDir, "*.yaml"))
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if err != nil {
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return []string{}, err
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}
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sort.Slice(files, func(i, j int) bool {
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return files[i] < files[j]
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})
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return files, nil
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}
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func fileExistsAt(path string) bool {
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fileInfo, err := os.Stat(path)
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return err == nil && fileInfo.Mode().IsRegular()
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}
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func directoryExistsAt(path string) bool {
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fileInfo, err := os.Stat(path)
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return err == nil && fileInfo.Mode().IsDir()
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}
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func loadDesiredStateFromFile(c *cli.Context, file string) (*state.HelmState, helmexec.Interface, error) {
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quiet := c.GlobalBool("quiet")
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kubeContext := c.GlobalString("kube-context")
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namespace := c.GlobalString("namespace")
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labels := c.GlobalStringSlice("selector")
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st, err := state.ReadFromFile(file)
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if err != nil {
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return nil, nil, fmt.Errorf("failed to read %s: %v", file, err)
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}
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if st.Context != "" {
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if kubeContext != "" {
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log.Printf("err: Cannot use option --kube-context and set attribute context.")
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os.Exit(1)
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}
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kubeContext = st.Context
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}
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if namespace != "" {
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if st.Namespace != "" {
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log.Printf("err: Cannot use option --namespace and set attribute namespace.")
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os.Exit(1)
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}
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st.Namespace = namespace
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}
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if len(labels) > 0 {
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err = st.FilterReleases(labels)
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if err != nil {
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log.Print(err)
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os.Exit(1)
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}
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}
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var writer io.Writer
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if !quiet {
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writer = os.Stdout
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}
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sigs := make(chan os.Signal, 1)
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signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
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go func() {
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sig := <-sigs
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errs := []error{fmt.Errorf("Received [%s] to shutdown ", sig)}
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clean(st, errs)
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}()
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return st, helmexec.New(writer, kubeContext), nil
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}
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func clean(state *state.HelmState, errs []error) error {
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if errs == nil {
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errs = []error{}
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}
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cleanErrs := state.Clean()
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if cleanErrs != nil {
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errs = append(errs, cleanErrs...)
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}
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if errs != nil && len(errs) > 0 {
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for _, err := range errs {
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fmt.Printf("err: %s\n", err.Error())
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}
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os.Exit(1)
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}
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return nil
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}
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func getArgs(c *cli.Context, state *state.HelmState) []string {
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args := c.String("args")
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if len(args) > 0 {
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state.HelmDefaults.Args = strings.Split(args, " ")
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}
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return state.HelmDefaults.Args
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}
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