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archive.go
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archive.go
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package pull
import (
"bytes"
"encoding/base64"
"fmt"
"io/ioutil"
"os"
"path"
"strconv"
"github.com/mholt/archiver"
"github.com/pkg/errors"
"github.com/replicatedhq/kots/pkg/base"
upstreamtypes "github.com/replicatedhq/kots/pkg/upstream/types"
"github.com/replicatedhq/kots/pkg/util"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime/serializer/json"
"k8s.io/client-go/kubernetes/scheme"
)
func writeArchiveAsConfigMap(pullOptions PullOptions, u *upstreamtypes.Upstream, baseDir string) error {
// Package this app into a bundle so that the Admin Console can write it as the first version...
tarGz := archiver.TarGz{
Tar: &archiver.Tar{
ImplicitTopLevelFolder: true,
},
}
paths := []string{
path.Join(pullOptions.RootDir, u.Name, "upstream"),
path.Join(pullOptions.RootDir, u.Name, "base"),
path.Join(pullOptions.RootDir, u.Name, "overlays"),
}
skippedFilesPath := path.Join(pullOptions.RootDir, "skippedFiles")
if _, err := os.Stat(skippedFilesPath); err == nil {
paths = append(paths, skippedFilesPath)
}
tempDir, err := ioutil.TempDir("", "kots")
if err != nil {
return errors.Wrap(err, "failed to create temp dir")
}
defer os.RemoveAll(tempDir)
if err := tarGz.Archive(paths, path.Join(tempDir, "kots-uploadable-archive.tar.gz")); err != nil {
return errors.Wrap(err, "failed to create tar gz")
}
archive, err := ioutil.ReadFile(path.Join(tempDir, "kots-uploadable-archive.tar.gz"))
if err != nil {
return errors.Wrap(err, "failed to read temp file")
}
encoded := base64.StdEncoding.EncodeToString(archive)
// well.
//
// let's write this encoded value to a config map with a known label
// so that kotsadm will upload it and ingest it as an app
// it's really the only way we can get the archive
// but etcd and config maps are limited to 1 mb
// so let's split it across multiple, if it's larger than 1 mb
// 768*1024 was chosen as a number sufficiently below 1m so as to allow
// for padding or other inefficiencies.
encodedParts, err := util.SplitStringOnLen(encoded, 768*1024)
if err != nil {
return errors.Wrap(err, "failed to split encoded")
}
s := json.NewYAMLSerializer(json.DefaultMetaFactory, scheme.Scheme, scheme.Scheme)
for i, encodedPart := range encodedParts {
labels := map[string]string{}
labels["kotsadm"] = "bundle"
labels["kotsadm-bundle-part"] = strconv.Itoa(i)
configMap := &corev1.ConfigMap{
TypeMeta: metav1.TypeMeta{
APIVersion: "v1",
Kind: "ConfigMap",
},
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("kotsadm-bundle-%d", i),
Labels: labels,
},
Data: map[string]string{
"part": encodedPart,
},
}
var b bytes.Buffer
if err := s.Encode(configMap, &b); err != nil {
return errors.Wrap(err, "failed to marshal bundle part config map")
}
if err := base.AddBundlePart(baseDir, fmt.Sprintf("kotsadm-bundle-%d.yaml", i), b.Bytes()); err != nil {
return errors.Wrap(err, "failed to write base")
}
}
return nil
}