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// Copyright 2012, 2013 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package main
import (
"errors"
"fmt"
"launchpad.net/gnuflag"
"launchpad.net/juju-core/charm"
"launchpad.net/juju-core/cmd"
"launchpad.net/juju-core/constraints"
"launchpad.net/juju-core/juju"
"launchpad.net/juju-core/state"
"os"
)
type DeployCommand struct {
EnvCommandBase
CharmName string
ServiceName string
Config cmd.FileVar
Constraints constraints.Value
NumUnits int // defaults to 1
BumpRevision bool
RepoPath string // defaults to JUJU_REPOSITORY
ForceMachineSpec string
}
const deployDoc = `
<charm name> can be a charm URL, or an unambiguously condensed form of it;
assuming a current default series of "precise", the following forms will be
accepted.
For cs:precise/mysql
mysql
precise/mysql
For cs:~user/precise/mysql
cs:~user/mysql
For local:precise/mysql
local:mysql
In all cases, a versioned charm URL will be expanded as expected (for example,
mysql-33 becomes cs:precise/mysql-33).
<service name>, if omitted, will be derived from <charm name>.
`
func (c *DeployCommand) Info() *cmd.Info {
return &cmd.Info{
Name: "deploy",
Args: "<charm name> [<service name>]",
Purpose: "deploy a new service",
Doc: deployDoc,
}
}
func (c *DeployCommand) SetFlags(f *gnuflag.FlagSet) {
c.EnvCommandBase.SetFlags(f)
f.IntVar(&c.NumUnits, "n", 1, "number of service units to deploy for principal charms")
f.IntVar(&c.NumUnits, "num-units", 1, "")
f.StringVar(&c.ForceMachineSpec, "force-machine", "", "machine/container to deploy initial unit, bypasses constraints")
f.BoolVar(&c.BumpRevision, "u", false, "increment local charm directory revision")
f.BoolVar(&c.BumpRevision, "upgrade", false, "")
f.Var(&c.Config, "config", "path to yaml-formatted service config")
f.Var(constraints.ConstraintsValue{&c.Constraints}, "constraints", "set service constraints")
f.StringVar(&c.RepoPath, "repository", os.Getenv("JUJU_REPOSITORY"), "local charm repository")
}
func (c *DeployCommand) Init(args []string) error {
// TODO --constraints
switch len(args) {
case 2:
if !state.IsServiceName(args[1]) {
return fmt.Errorf("invalid service name %q", args[1])
}
c.ServiceName = args[1]
fallthrough
case 1:
if _, err := charm.InferURL(args[0], "fake"); err != nil {
return fmt.Errorf("invalid charm name %q", args[0])
}
c.CharmName = args[0]
case 0:
return errors.New("no charm specified")
default:
return cmd.CheckEmpty(args[2:])
}
if c.NumUnits < 1 {
return errors.New("--num-units must be a positive integer")
}
if c.ForceMachineSpec != "" {
if c.NumUnits > 1 {
return errors.New("cannot use --num-units > 1 with --force-machine")
}
if !state.IsMachineOrNewContainer(c.ForceMachineSpec) {
return fmt.Errorf("invalid --force-machine parameter %q", c.ForceMachineSpec)
}
}
return nil
}
func (c *DeployCommand) Run(ctx *cmd.Context) error {
conn, err := juju.NewConnFromName(c.EnvName)
if err != nil {
return err
}
defer conn.Close()
conf, err := conn.State.EnvironConfig()
if err != nil {
return err
}
curl, err := charm.InferURL(c.CharmName, conf.DefaultSeries())
if err != nil {
return err
}
repo, err := charm.InferRepository(curl, ctx.AbsPath(c.RepoPath))
if err != nil {
return err
}
// TODO(fwereade) it's annoying to roundtrip the bytes through the client
// here, but it's the original behaviour and not convenient to change.
// PutCharm will always be required in some form for local charms; and we
// will need an EnsureStoreCharm method somewhere that gets the state.Charm
// for use in the following checks.
ch, err := conn.PutCharm(curl, repo, c.BumpRevision)
if err != nil {
return err
}
numUnits := c.NumUnits
if ch.Meta().Subordinate {
empty := constraints.Value{}
if c.Constraints != empty {
return errors.New("cannot use --constraints with subordinate service")
}
if numUnits == 1 && c.ForceMachineSpec == "" {
numUnits = 0
} else {
return errors.New("cannot use --num-units or --force-machine with subordinate service")
}
}
serviceName := c.ServiceName
if serviceName == "" {
serviceName = ch.Meta().Name
}
var settings charm.Settings
if c.Config.Path != "" {
configYAML, err := c.Config.Read(ctx)
if err != nil {
return err
}
settings, err = ch.Config().ParseSettingsYAML(configYAML, serviceName)
if err != nil {
return err
}
}
_, err = conn.DeployService(juju.DeployServiceParams{
ServiceName: serviceName,
Charm: ch,
NumUnits: numUnits,
ConfigSettings: settings,
Constraints: c.Constraints,
ForceMachineSpec: c.ForceMachineSpec,
})
return err
}
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