isle/go/cmd/entrypoint/garage.go

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package main
import (
"errors"
"fmt"
"os"
"path/filepath"
"syscall"
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"isle/daemon"
)
// minio-client keeps a configuration directory which contains various pieces of
// information which may or may not be useful. Unfortunately when it initializes
// this directory it likes to print some annoying logs, so we pre-initialize in
// order to prevent it from doing so.
func initMCConfigDir() (string, error) {
var (
path = filepath.Join(daemonEnvVars.StateDirPath, "mc")
sharePath = filepath.Join(path, "share")
configJSONPath = filepath.Join(path, "config.json")
)
if err := os.MkdirAll(sharePath, 0700); err != nil {
return "", fmt.Errorf("creating %q: %w", sharePath, err)
}
if err := os.WriteFile(configJSONPath, []byte(`{}`), 0600); err != nil {
return "", fmt.Errorf("writing %q: %w", configJSONPath, err)
}
return path, nil
}
var subCmdGarageMC = subCmd{
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name: "mc",
descr: "Runs the mc (minio-client) binary. The isle garage can be accessed under the `garage` alias",
do: func(subCmdCtx subCmdCtx) error {
flags := subCmdCtx.flagSet(true)
keyID := flags.StringP(
"key-id", "i", "",
"Optional key ID to use, defaults to that of the shared global key",
)
keySecret := flags.StringP(
"key-secret", "s", "",
"Optional key secret to use, defaults to that of the shared global key",
)
if err := flags.Parse(subCmdCtx.args); err != nil {
return fmt.Errorf("parsing flags: %w", err)
}
var clientParams daemon.GarageClientParams
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err := subCmdCtx.daemonRCPClient.Call(
subCmdCtx.ctx, &clientParams, "GetGarageClientParams", nil,
)
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if err != nil {
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return fmt.Errorf("calling GetGarageClientParams: %w", err)
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}
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s3APIAddr := clientParams.Peer.S3APIAddr()
if *keyID == "" {
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*keyID = clientParams.GlobalBucketS3APICredentials.ID
}
if *keySecret == "" {
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*keySecret = clientParams.GlobalBucketS3APICredentials.Secret
}
args := flags.Args()
if i := flags.ArgsLenAtDash(); i >= 0 {
args = args[i:]
}
configDir, err := initMCConfigDir()
if err != nil {
return fmt.Errorf("initializing minio-client config directory: %w", err)
}
args = append([]string{
binPath("mc"),
"--config-dir", configDir,
}, args...)
var (
mcHostVar = fmt.Sprintf(
"MC_HOST_garage=http://%s:%s@%s",
*keyID, *keySecret, s3APIAddr,
)
binPath = filepath.Join(envAppDirPath, "bin/mc")
cliEnv = append(
os.Environ(),
mcHostVar,
// The garage docs say this is necessary, though nothing bad
// seems to happen if we leave it out *shrug*
"MC_REGION=garage",
)
)
if err := syscall.Exec(binPath, args, cliEnv); err != nil {
return fmt.Errorf(
"calling exec(%q, %#v, %#v): %w",
binPath, args, cliEnv, err,
)
}
return nil
},
}
var subCmdGarageCLI = subCmd{
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name: "cli",
descr: "Runs the garage binary, automatically configured to point to the garage sub-process of a running isle daemon",
do: func(subCmdCtx subCmdCtx) error {
var clientParams daemon.GarageClientParams
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err := subCmdCtx.daemonRCPClient.Call(
subCmdCtx.ctx, &clientParams, "GetGarageClientParams", nil,
)
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if err != nil {
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return fmt.Errorf("calling GetGarageClientParams: %w", err)
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}
if clientParams.RPCSecret == "" {
return errors.New("this host does not have the garage RPC secret")
}
var (
binPath = binPath("garage")
args = append([]string{"garage"}, subCmdCtx.args...)
cliEnv = append(
os.Environ(),
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"GARAGE_RPC_HOST="+clientParams.Peer.RPCPeerAddr(),
"GARAGE_RPC_SECRET="+clientParams.RPCSecret,
)
)
if err := syscall.Exec(binPath, args, cliEnv); err != nil {
return fmt.Errorf(
"calling exec(%q, %#v, %#v): %w",
binPath, args, cliEnv, err,
)
}
return nil
},
}
var subCmdGarage = subCmd{
name: "garage",
descr: "Runs the garage binary, automatically configured to point to the garage sub-process of a running isle daemon",
do: func(subCmdCtx subCmdCtx) error {
return subCmdCtx.doSubCmd(
subCmdGarageCLI,
subCmdGarageMC,
)
},
}