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data.go
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data.go
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package objects
import (
"context"
"encoding/json"
"os"
"strings"
"sync"
"time"
"io"
"github.com/joomcode/errorx"
"github.com/komodorio/helm-dashboard/pkg/dashboard/subproc"
"github.com/pkg/errors"
log "github.com/sirupsen/logrus"
"helm.sh/helm/v3/pkg/action"
"helm.sh/helm/v3/pkg/cli"
"helm.sh/helm/v3/pkg/release"
v1 "k8s.io/apimachinery/pkg/apis/testapigroup/v1"
"k8s.io/apimachinery/pkg/util/yaml"
"k8s.io/client-go/tools/clientcmd"
//"sigs.k8s.io/yaml"
)
type DataLayer struct {
KubeContext string
Scanners []subproc.Scanner
StatusInfo *StatusInfo
Namespaces []string
Cache *Cache
ConfGen HelmConfigGetter
appPerContext map[string]*Application
appPerContextMx *sync.Mutex
devel bool
LocalCharts []string
}
type StatusInfo struct {
CurVer string
LatestVer string
Analytics bool
CacheHitRatio float64
ClusterMode bool
}
func NewDataLayer(ns []string, ver string, cg HelmConfigGetter, devel bool) (*DataLayer, error) {
if cg == nil {
return nil, errors.New("HelmConfigGetter can't be nil")
}
return &DataLayer{
Namespaces: ns,
Cache: NewCache(),
StatusInfo: &StatusInfo{
CurVer: ver,
Analytics: false,
},
ConfGen: cg,
appPerContext: map[string]*Application{},
appPerContextMx: new(sync.Mutex),
devel: devel,
}, nil
}
func (d *DataLayer) ListContexts() ([]KubeContext, error) {
res := []KubeContext{}
if d.StatusInfo.ClusterMode {
return res, nil
}
cfg, err := clientcmd.NewDefaultPathOptions().GetStartingConfig()
if err != nil {
return nil, errorx.Decorate(err, "failed to get kubectl config")
}
for name, ctx := range cfg.Contexts {
res = append(res, KubeContext{
IsCurrent: cfg.CurrentContext == name,
Name: name,
Cluster: ctx.Cluster,
AuthInfo: ctx.AuthInfo,
Namespace: ctx.Namespace,
})
}
return res, nil
}
func (d *DataLayer) GetStatus() *StatusInfo {
sum := float64(d.Cache.HitCount + d.Cache.MissCount)
if sum > 0 {
d.StatusInfo.CacheHitRatio = float64(d.Cache.HitCount) / sum
} else {
d.StatusInfo.CacheHitRatio = 0
}
return d.StatusInfo
}
type SectionFn = func(*release.Release, bool) (string, error)
func ParseManifests(out string) ([]*v1.Carp, error) {
dec := yaml.NewYAMLOrJSONDecoder(strings.NewReader(out), 4096)
res := make([]*v1.Carp, 0)
var tmp interface{}
for {
err := dec.Decode(&tmp)
if err == io.EOF {
break
}
if err != nil {
return res, errorx.Decorate(err, "failed to parse manifest document #%d", len(res)+1)
}
// k8s libs uses only JSON tags defined, say hello to https://github.com/go-yaml/yaml/issues/424
// we can juggle it
jsoned, err := json.Marshal(tmp)
if err != nil {
return res, err
}
var doc v1.Carp
err = json.Unmarshal(jsoned, &doc)
if err != nil {
return res, err
}
if doc.Kind == "" {
log.Warnf("Manifest piece is not k8s resource: %s", jsoned)
continue
}
res = append(res, &doc)
}
return res, nil
}
func (d *DataLayer) SetContext(ctx string) error {
if d.KubeContext != ctx {
err := d.Cache.Clear()
if err != nil {
return errors.Wrap(err, "failed to set context")
}
}
d.KubeContext = ctx
return nil
}
func (d *DataLayer) AppForCtx(ctx string) (*Application, error) {
d.appPerContextMx.Lock()
defer d.appPerContextMx.Unlock()
app, ok := d.appPerContext[ctx]
if !ok {
settings := cli.New()
settings.KubeContext = ctx
settings.SetNamespace(d.nsForCtx(ctx))
cfgGetter := func(ns string) (*action.Configuration, error) {
return d.ConfGen(settings, ns)
}
a, err := NewApplication(settings, cfgGetter, d.Namespaces, d.devel)
if err != nil {
return nil, errorx.Decorate(err, "Failed to create application for context '%s'", ctx)
}
a.Repositories.LocalCharts = d.LocalCharts
app = a
d.appPerContext[ctx] = app
}
return app, nil
}
func (d *DataLayer) nsForCtx(ctx string) string {
lst, err := d.ListContexts()
if err != nil {
log.Debugf("Failed to get contexts for NS lookup: %+v", err)
}
for _, c := range lst {
if c.Name == ctx {
return c.Namespace
}
}
log.Debugf("Strange: no context found for '%s'", ctx)
return ""
}
func (d *DataLayer) PeriodicTasks(ctx context.Context) {
// TODO: separate scanning setup for in-cluster?
if os.Getenv("HD_NO_AUTOUPDATE") == "" {
// auto-update repos
go d.loopUpdateRepos(ctx, 10*time.Minute) // TODO: parameterize interval?
}
// auto-scan
}
func (d *DataLayer) loopUpdateRepos(ctx context.Context, interval time.Duration) {
ticker := time.NewTicker(interval)
for {
app, err := d.AppForCtx("")
if err != nil {
log.Warnf("Failed to get app object while in background repo update: %v", err)
break // no point in retrying
} else {
repos, err := app.Repositories.List()
if err != nil {
log.Warnf("Failed to get list of repos while in background update: %v", err)
}
for _, repo := range repos {
err := repo.Update()
if err != nil {
log.Warnf("Failed to update repo %s: %v", repo.Name(), err)
}
}
}
select {
case <-ctx.Done():
ticker.Stop()
return
case <-ticker.C:
continue
}
}
log.Debugf("Update repo loop done.")
}