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deploy.go
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deploy.go
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// Mgmt
// Copyright (C) 2013-2022+ James Shubin and the project contributors
// Written by James Shubin <[email protected]> and the project contributors
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package lib
import (
"context"
"fmt"
"log"
"os"
"github.com/purpleidea/mgmt/etcd/client"
"github.com/purpleidea/mgmt/etcd/deployer"
etcdfs "github.com/purpleidea/mgmt/etcd/fs"
"github.com/purpleidea/mgmt/gapi"
"github.com/purpleidea/mgmt/util/errwrap"
"github.com/pborman/uuid"
"github.com/urfave/cli/v2"
git "gopkg.in/src-d/go-git.v4"
)
const (
// MetadataPrefix is the etcd prefix where all our fs superblocks live.
MetadataPrefix = "/fs"
// StoragePrefix is the etcd prefix where all our fs data lives.
StoragePrefix = "/storage"
)
// deploy is the cli target to manage deploys to our cluster.
// TODO: add a timeout and/or cancel signal to replace context.TODO()
func deploy(c *cli.Context, name string, gapiObj gapi.GAPI) error {
cliContext := c.Lineage()[1]
if cliContext == nil {
return fmt.Errorf("could not get cli context")
}
program, version := safeProgram(c.App.Name), c.App.Version
var flags Flags
var debug bool
if val, exists := c.App.Metadata["flags"]; exists {
if f, ok := val.(Flags); ok {
flags = f
debug = flags.Debug
}
}
Logf := func(format string, v ...interface{}) {
log.Printf("deploy: "+format, v...)
}
hello(program, version, flags) // say hello!
defer Logf("goodbye!")
var hash, pHash string
if !cliContext.Bool("no-git") {
wd, err := os.Getwd()
if err != nil {
return errwrap.Wrapf(err, "could not get current working directory")
}
repo, err := git.PlainOpen(wd)
if err != nil {
return errwrap.Wrapf(err, "could not open git repo")
}
head, err := repo.Head()
if err != nil {
return errwrap.Wrapf(err, "could not read git HEAD")
}
hash = head.Hash().String() // current commit id
Logf("hash: %s", hash)
lo := &git.LogOptions{
From: head.Hash(),
}
commits, err := repo.Log(lo)
if err != nil {
return errwrap.Wrapf(err, "could not read git log")
}
if _, err := commits.Next(); err != nil { // skip over HEAD
return errwrap.Wrapf(err, "could not read HEAD in git log") // weird!
}
commit, err := commits.Next()
if err == nil { // errors are okay, we might be empty
pHash = commit.Hash.String() // previous commit id
}
Logf("previous deploy hash: %s", pHash)
if cliContext.Bool("force") {
pHash = "" // don't check this :(
}
if hash == "" {
return errwrap.Wrapf(err, "could not get git deploy hash")
}
}
uniqueid := uuid.New() // panic's if it can't generate one :P
etcdClient := client.NewClientFromSeedsNamespace(
cliContext.StringSlice("seeds"), // endpoints
NS,
)
if err := etcdClient.Init(); err != nil {
return errwrap.Wrapf(err, "client Init failed")
}
defer func() {
err := errwrap.Wrapf(etcdClient.Close(), "client Close failed")
if err != nil {
// TODO: cause the final exit code to be non-zero
Logf("client cleanup error: %+v", err)
}
}()
simpleDeploy := &deployer.SimpleDeploy{
Client: etcdClient,
Debug: debug,
Logf: func(format string, v ...interface{}) {
Logf("deploy: "+format, v...)
},
}
if err := simpleDeploy.Init(); err != nil {
return errwrap.Wrapf(err, "deploy Init failed")
}
defer func() {
err := errwrap.Wrapf(simpleDeploy.Close(), "deploy Close failed")
if err != nil {
// TODO: cause the final exit code to be non-zero
Logf("deploy cleanup error: %+v", err)
}
}()
// get max id (from all the previous deploys)
max, err := simpleDeploy.GetMaxDeployID(context.TODO())
if err != nil {
return errwrap.Wrapf(err, "error getting max deploy id")
}
// find the latest id
var id = max + 1 // next id
Logf("previous max deploy id: %d", max)
etcdFs := &etcdfs.Fs{
Client: etcdClient,
// TODO: using a uuid is meant as a temporary measure, i hate them
Metadata: MetadataPrefix + fmt.Sprintf("/deploy/%d-%s", id, uniqueid),
DataPrefix: StoragePrefix,
Debug: debug,
Logf: func(format string, v ...interface{}) {
Logf("fs: "+format, v...)
},
}
cliInfo := &gapi.CliInfo{
CliContext: c, // don't pass in the parent context
Fs: etcdFs,
Debug: debug,
Logf: func(format string, v ...interface{}) {
// TODO: is this a sane prefix to use here?
log.Printf("cli: "+format, v...)
},
}
deploy, err := gapiObj.Cli(cliInfo)
if err != nil {
return errwrap.Wrapf(err, "cli parse error")
}
if deploy == nil { // not used
return fmt.Errorf("not enough information specified")
}
// redundant
deploy.Noop = cliContext.Bool("noop")
deploy.Sema = cliContext.Int("sema")
str, err := deploy.ToB64()
if err != nil {
return errwrap.Wrapf(err, "encoding error")
}
// this nominally checks the previous git hash matches our expectation
if err := simpleDeploy.AddDeploy(context.TODO(), id, hash, pHash, &str); err != nil {
return errwrap.Wrapf(err, "could not create deploy id `%d`", id)
}
Logf("success, id: %d", id)
return nil
}