feat: implement scheduler-k3s:initialize

2024-01-12 02:25:22 -05:00
parent d6824c44c7
commit ec538ce1c5
8 changed files with 129 additions and 7 deletions
--- a/docs/deployment/schedulers/k3s.md
+++ b/docs/deployment/schedulers/k3s.md
@@ -1,10 +1,10 @@
 # K3s Scheduler

 ```
-scheduler-k3s:initialize [<--local>|<--remote user:password@host:port>] # initializes a cluster
-scheduler-k3s:add-server [user:password@host:port]                      # adds a server node to a Dokku-managed cluster
-scheduler-k3s:add-client [user:password@host:port]                      # adds a client node to a Dokku-managed cluster
-scheduler-k3s:set [<app>|--global] <key> (<value>)                      # Set or clear a scheduler-k3s property for an app or the scheduler
+scheduler-k3s:initialize                           # initializes a cluster
+scheduler-k3s:add-server [user:password@host:port] # adds a server node to a Dokku-managed cluster
+scheduler-k3s:add-client [user:password@host:port] # adds a client node to a Dokku-managed cluster
+scheduler-k3s:set [<app>|--global] <key> (<value>) # Set or clear a scheduler-k3s property for an app or the scheduler
 ```

 > [!IMPORTANT]
@@ -29,6 +29,7 @@ dokku scheduler:set node-js-app k3s
 Initialize the cluster in single-node mode. This will start k3s on the Dokku node itself.

 ```shell
+# must be run as root
 dokku scheduler-k3s:initialize
 ```

--- a/4
+++ b/4
@@ -89,14 +89,14 @@ fi

 if [[ $(id -un) != "dokku" ]]; then
  unset TMP TMPDIR TEMP TEMPDIR
-  if [[ ! $1 =~ plugin:* ]] && [[ $1 != "ssh-keys:add" ]] && [[ $1 != "ssh-keys:remove" ]]; then
+  if [[ ! $1 =~ plugin:* ]] && [[ $1 != "ssh-keys:add" ]] && [[ $1 != "ssh-keys:remove" ]] && [[ $1 != "scheduler-k3s:initialize" ]]; then
    export SSH_USER=$(id -un)
    sudo -u dokku -E -H "$0" "$@"
    exit $?
  fi
 fi

-if [[ $1 =~ ^plugin:.* && $1 != "plugin:help" && $1 != "plugin:list" ]] || [[ $1 == "ssh-keys:add" ]] || [[ $1 == "ssh-keys:remove" ]]; then
+if [[ $1 =~ ^plugin:.* && $1 != "plugin:help" && $1 != "plugin:list" ]] || [[ $1 == "ssh-keys:add" ]] || [[ $1 == "ssh-keys:remove" ]] || [[ $1 == "scheduler-k3s:initialize" ]]; then
  if [[ $(id -un) != "root" ]]; then
    dokku_log_fail "This command must be run as root"
  else
--- a/plugins/scheduler-k3s/Makefile
+++ b/plugins/scheduler-k3s/Makefile
@@ -1,4 +1,4 @@
-SUBCOMMANDS = subcommands/report subcommands/set
+SUBCOMMANDS = subcommands/initialize subcommands/report subcommands/set
 TRIGGERS = triggers/install triggers/post-app-clone-setup triggers/post-app-rename-setup triggers/post-delete triggers/report
 BUILD = commands subcommands triggers
 PLUGIN_NAME = scheduler-k3s
--- a/plugins/scheduler-k3s/go.mod
+++ b/plugins/scheduler-k3s/go.mod
@@ -4,6 +4,7 @@ go 1.21

 require (
 	github.com/dokku/dokku/plugins/common v0.0.0-00010101000000-000000000000
+	github.com/go-resty/resty/v2 v2.11.0
 	github.com/spf13/pflag v1.0.5
 )

@@ -12,6 +13,7 @@ require (
 	github.com/codeskyblue/go-sh v0.0.0-20190412065543-76bd3d59ff27 // indirect
 	github.com/otiai10/copy v1.14.0 // indirect
 	github.com/ryanuber/columnize v2.1.2+incompatible // indirect
+	golang.org/x/net v0.17.0 // indirect
 	golang.org/x/sync v0.6.0 // indirect
 	golang.org/x/sys v0.13.0 // indirect
 )
--- a/plugins/scheduler-k3s/go.sum
+++ b/plugins/scheduler-k3s/go.sum
@@ -2,6 +2,8 @@ github.com/codegangsta/inject v0.0.0-20150114235600-33e0aa1cb7c0 h1:sDMmm+q/3+Bu
 github.com/codegangsta/inject v0.0.0-20150114235600-33e0aa1cb7c0/go.mod h1:4Zcjuz89kmFXt9morQgcfYZAYZ5n8WHjt81YYWIwtTM=
 github.com/codeskyblue/go-sh v0.0.0-20190412065543-76bd3d59ff27 h1:HHUr4P/aKh4quafGxDT9LDasjGdlGkzLbfmmrlng3kA=
 github.com/codeskyblue/go-sh v0.0.0-20190412065543-76bd3d59ff27/go.mod h1:VQx0hjo2oUeQkQUET7wRwradO6f+fN5jzXgB/zROxxE=
+github.com/go-resty/resty/v2 v2.11.0 h1:i7jMfNOJYMp69lq7qozJP+bjgzfAzeOhuGlyDrqxT/8=
+github.com/go-resty/resty/v2 v2.11.0/go.mod h1:iiP/OpA0CkcL3IGt1O0+/SIItFUbkkyw5BGXiVdTu+A=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/onsi/gomega v1.30.0 h1:hvMK7xYz4D3HapigLTeGdId/NcfQx1VHMJc60ew99+8=
@@ -14,13 +16,51 @@ github.com/ryanuber/columnize v2.1.2+incompatible h1:C89EOx/XBWwIXl8wm8OPJBd7kPF
 github.com/ryanuber/columnize v2.1.2+incompatible/go.mod h1:sm1tb6uqfes/u+d4ooFouqFdy9/2g9QGwK3SQygK0Ts=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/crypto v0.14.0/go.mod h1:MVFd36DqK4CsrnJYDkBA3VC4m2GkXAM0PvzMCn4JQf4=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
 golang.org/x/net v0.17.0 h1:pVaXccu2ozPjCXewfr1S7xza/zcXTity9cCdXQYSjIM=
 golang.org/x/net v0.17.0/go.mod h1:NxSsAGuq816PNPmqtQdLE42eU2Fs7NoRIZrHJAlaCOE=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.6.0 h1:5BMeUDZ7vkXGfEr1x9B4bRcTH4lpkTkpdh0T/J+qjbQ=
 golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.13.0 h1:Af8nKPmuFypiUBjVoU9V20FiaFXOcuZI21p0ycVYYGE=
 golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
+golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
+golang.org/x/term v0.13.0/go.mod h1:LTmsnFJwVN6bCy1rVCoS+qHT1HhALEFxKncY3WNNh4U=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
 golang.org/x/text v0.13.0 h1:ablQoSUd0tRdKxZewP80B+BaqeKJuVhuRxj/dkrun3k=
 golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
+golang.org/x/time v0.3.0 h1:rg5rLMjNzMS1RkNLzCG38eapWhnYLFYXDXj2gOlr8j4=
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+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
--- a/plugins/scheduler-k3s/src/commands/commands.go
+++ b/plugins/scheduler-k3s/src/commands/commands.go
@@ -18,6 +18,7 @@ Manage scheduler-k3s settings for an app
 Additional commands:`

 	helpContent = `
+    scheduler-k3s:initialize, Initializes a cluster
    scheduler-k3s:report [<app>] [<flag>], Displays a scheduler-k3s report for one or more apps
    scheduler-k3s:set <app> <property> (<value>), Set or clear a scheduler-k3s property for an app
 `
--- a/plugins/scheduler-k3s/src/subcommands/subcommands.go
+++ b/plugins/scheduler-k3s/src/subcommands/subcommands.go
@@ -18,6 +18,10 @@ func main() {

 	var err error
 	switch subcommand {
+	case "initialize":
+		args := flag.NewFlagSet("scheduler-k3s:initialize", flag.ExitOnError)
+		args.Parse(os.Args[2:])
+		err = scheduler_k3s.CommandInitialize()
 	case "report":
 		args := flag.NewFlagSet("scheduler-k3s:report", flag.ExitOnError)
 		format := args.String("format", "stdout", "format: [ stdout | json ]")
--- a/plugins/scheduler-k3s/subcommands.go
+++ b/plugins/scheduler-k3s/subcommands.go
@@ -1,9 +1,83 @@
 package scheduler_k3s

 import (
+	"fmt"
+	"os"
+	"strings"
+	"time"
+
 	"github.com/dokku/dokku/plugins/common"
+	resty "github.com/go-resty/resty/v2"
 )

+// CommandInitialize initializes a k3s cluster on the local server
+func CommandInitialize() error {
+	client := resty.New()
+	resp, err := client.R().
+		Get("https://get.k3s.io")
+	if err != nil {
+		return fmt.Errorf("Unable to download k3s installer: %w", err)
+	}
+	if resp == nil {
+		return fmt.Errorf("Missing response from k3s installer download: %w", err)
+	}
+
+	if resp.StatusCode() != 200 {
+		return fmt.Errorf("Invalid status code for k3s installer script: %d", resp.StatusCode())
+	}
+
+	f, err := os.CreateTemp("", "sample")
+	if err != nil {
+		return fmt.Errorf("Unable to create temporary file for k3s installer: %w", err)
+	}
+	defer os.Remove(f.Name())
+
+	err = common.WriteSliceToFile(common.WriteSliceToFileInput{
+		Filename: f.Name(),
+		Lines:    strings.Split(resp.String(), "\n"),
+		Mode:     os.FileMode(755),
+	})
+	if err != nil {
+		return fmt.Errorf("Unable to write k3s installer to file: %w", err)
+	}
+
+	if err := f.Close(); err != nil {
+		return fmt.Errorf("Unable to close k3s installer file: %w", err)
+	}
+
+	fi, err := os.Stat(f.Name())
+	if err != nil {
+		return fmt.Errorf("Unable to get k3s installer file size: %w", err)
+	}
+
+	if fi.Size() == 0 {
+		return fmt.Errorf("Invalid k3s installer filesize")
+	}
+
+	time.Sleep(1 * time.Second)
+
+	// todo: allow this to be passed as an option or environment variable
+	token := "password"
+	if err := CommandSet("--global", "token", token); err != nil {
+		return fmt.Errorf("Unable to set k3s token: %w", err)
+	}
+
+	installerCmd := common.NewShellCmd(strings.Join([]string{
+		f.Name(),
+		// initialize the cluster
+		"--cluster-init",
+		// allow access for the dokku user
+		"--write-kubeconfig-mode", "0644",
+		// specify a token
+		"--token", token,
+	}, " "))
+	if !installerCmd.Execute() {
+		return fmt.Errorf("Error installing k3s: %w", installerCmd.ExitError)
+	}
+
+	return nil
+}
+
 // CommandReport displays a scheduler-k3s report for one or more apps
 func CommandReport(appName string, format string, infoFlag string) error {
 	if len(appName) == 0 {