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swarm.go
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swarm.go
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package swarm
import (
mach "github.com/poddworks/machine/lib/machine"
"github.com/urfave/cli"
"fmt"
)
func NewCreateCommand() cli.Command {
return cli.Command{
Name: "swarm",
Usage: "Join Docker Engines into Swarm",
Flags: []cli.Flag{
cli.StringSliceFlag{Name: "manager", Usage: "Join Swarm as Manager"},
cli.StringSliceFlag{Name: "worker", Usage: "Join Swarm as Worker"},
},
Action: func(c *cli.Context) error {
var (
managers = c.StringSlice("manager")
workers = c.StringSlice("worker")
)
if len(managers) == 0 {
return cli.NewExitError("You must specify at least one Manager Node", 1)
}
firstName := managers[0]
firstManager, ok := mach.InstList[firstName]
if !ok {
return cli.NewExitError("Manager node not found", 1)
}
// Step 1: Connect to one manager and enable swarm mode
advertiseAddr, err := firstManager.SwarmInit()
if err != nil {
return cli.NewExitError(fmt.Sprintf("%s - %s", firstName, err), 1)
}
// Step 2: Request a join token (manager and worker token)
managerToken, workerToken, err := firstManager.SwarmToken()
if err != nil {
return cli.NewExitError("error/failed-to-create-swarm-token", 1)
}
// Step 3: Join manager nodes
for _, name := range managers[1:] {
node, ok := mach.InstList[name]
if !ok {
return cli.NewExitError("Manager node not found", 1)
} else {
node.NewDockerClient()
}
if err := node.SwarmJoin(managerToken, advertiseAddr); err != nil {
return cli.NewExitError(fmt.Sprintf("%s - %s", name, err), 1)
}
}
// Step 4: Join worker nodes
for _, name := range workers {
node, ok := mach.InstList[name]
if !ok {
return cli.NewExitError("error/manager-node-not-found", 1)
}
if err := node.SwarmJoin(workerToken, advertiseAddr); err != nil {
return cli.NewExitError("error/failed-to-join-node", 1)
}
}
return nil
},
}
}
func NewCommand() cli.Command {
return cli.Command{
Name: "swarm",
Usage: "Manage Docker Engine Swarm",
Subcommands: []cli.Command{
joinToCluster(),
},
BashComplete: func(c *cli.Context) {
for _, cmd := range c.App.Commands {
fmt.Fprint(c.App.Writer, " ", cmd.Name)
}
},
}
}
func joinToCluster() cli.Command {
return cli.Command{
Name: "join",
Usage: "Join to a Swarm mode cluster",
Flags: []cli.Flag{
cli.BoolFlag{Name: "as-manager", Usage: "Join as manager"},
cli.StringFlag{Name: "manager", Usage: "Manager of this cluster"},
},
Action: func(c *cli.Context) error {
var (
managerName = c.String("manager")
newNodes = c.Args()
asManager = c.Bool("as-manager")
joinToken string
)
manager, ok := mach.InstList[managerName]
if !ok {
return cli.NewExitError("Manager node not found", 1)
} else {
manager.NewDockerClient()
}
// Step 1: Retrieve advertiseAddr from manager
advertiseAddr := manager.AltHost[0]
// Step 2: Request a join token (manager and worker token)
managerToken, workerToken, err := manager.SwarmToken()
if err != nil {
return cli.NewExitError("error/failed-to-create-swarm-token", 1)
}
if asManager {
joinToken = managerToken
} else {
joinToken = workerToken
}
for _, name := range newNodes {
node, ok := mach.InstList[name]
if !ok {
return cli.NewExitError("Swarm node not found", 1)
} else {
node.NewDockerClient()
}
if err := node.SwarmJoin(joinToken, advertiseAddr); err != nil {
return cli.NewExitError(fmt.Sprintf("%s - %s", name, err), 1)
}
}
return nil
},
BashComplete: func(c *cli.Context) {
for name, _ := range mach.InstList {
fmt.Fprint(c.App.Writer, name, " ")
}
},
}
}