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Allow forcing a desired model version.
At the State level, allow a force flag that ignores the agent-version check. Expose this with a direct client that can trigger an upgrade to any version you want.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "os" | ||
| "path/filepath" | ||
|
|
||
| "github.com/juju/errors" | ||
| "github.com/juju/gnuflag" | ||
| "github.com/juju/loggo" | ||
| "github.com/juju/utils/clock" | ||
| "github.com/juju/version" | ||
| "gopkg.in/juju/names.v2" | ||
|
|
||
| "github.com/juju/juju/agent" | ||
| "github.com/juju/juju/mongo" | ||
| "github.com/juju/juju/state" | ||
| jversion "github.com/juju/juju/version" | ||
| ) | ||
|
|
||
| var logger = loggo.GetLogger("forceagentversion") | ||
|
|
||
| func checkErr(label string, err error) { | ||
| if err != nil { | ||
| logger.Errorf("%s: %s", label, err) | ||
| os.Exit(1) | ||
| } | ||
| } | ||
|
|
||
| const dataDir = "/var/lib/juju" | ||
|
|
||
| func getState() (*state.State, error) { | ||
| tag, err := getCurrentMachineTag(dataDir) | ||
| if err != nil { | ||
| return nil, errors.Annotate(err, "finding machine tag") | ||
| } | ||
|
|
||
| logger.Infof("current machine tag: %s", tag) | ||
|
|
||
| config, err := getConfig(tag) | ||
| if err != nil { | ||
| return nil, errors.Annotate(err, "loading agent config") | ||
| } | ||
|
|
||
| mongoInfo, available := config.MongoInfo() | ||
| if !available { | ||
| return nil, errors.New("mongo info not available from agent config") | ||
| } | ||
| st, err := state.Open(state.OpenParams{ | ||
| Clock: clock.WallClock, | ||
| ControllerTag: config.Controller(), | ||
| ControllerModelTag: config.Model(), | ||
| MongoInfo: mongoInfo, | ||
| MongoDialOpts: mongo.DefaultDialOpts(), | ||
| }) | ||
| if err != nil { | ||
| return nil, errors.Annotate(err, "opening state connection") | ||
| } | ||
| return st, nil | ||
| } | ||
|
|
||
| func getCurrentMachineTag(datadir string) (names.MachineTag, error) { | ||
| var empty names.MachineTag | ||
| values, err := filepath.Glob(filepath.Join(datadir, "agents", "machine-*")) | ||
| if err != nil { | ||
| return empty, errors.Annotate(err, "problem globbing") | ||
| } | ||
| switch len(values) { | ||
| case 0: | ||
| return empty, errors.Errorf("no machines found") | ||
| case 1: | ||
| return names.ParseMachineTag(filepath.Base(values[0])) | ||
| default: | ||
| return empty, errors.Errorf("too many options: %v", values) | ||
| } | ||
| } | ||
|
|
||
| func getConfig(tag names.MachineTag) (agent.ConfigSetterWriter, error) { | ||
| path := agent.ConfigPath("/var/lib/juju", tag) | ||
| return agent.ReadConfig(path) | ||
| } | ||
|
|
||
| func main() { | ||
| loggo.GetLogger("").SetLogLevel(loggo.TRACE) | ||
| gnuflag.Usage = func() { | ||
| fmt.Printf("Usage: %s <model-uuid> <version>\n", os.Args[0]) | ||
| os.Exit(1) | ||
| } | ||
|
|
||
| gnuflag.Parse(true) | ||
|
|
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| args := gnuflag.Args() | ||
| if len(args) < 2 { | ||
| gnuflag.Usage() | ||
| } | ||
|
|
||
| modelUUID := args[0] | ||
| agentVersion := version.MustParse(args[1]) | ||
| if agentVersion.Compare(jversion.Current) < 0 { | ||
| // Force the client to think it is at least as new as the desired version | ||
| jversion.Current = agentVersion | ||
| } | ||
|
|
||
| st, err := getState() | ||
| checkErr("getting state connection", err) | ||
| defer st.Close() | ||
|
|
||
| modelSt, err := st.ForModel(names.NewModelTag(modelUUID)) | ||
| checkErr("open model", err) | ||
| checkErr("set model agent version", modelSt.SetModelAgentVersion(agentVersion, true)) | ||
| } |
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