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remove bootstrap pods from cluster, and render in hosts' context

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This commit is contained in:
Mikaël Cluseau 2023-01-16 18:17:11 +01:00
parent 76e02c6f31
commit 4ff85eaeb3
4 changed files with 88 additions and 113 deletions
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1
cmd/dkl-dir2config/main.go
View File

@ -45,7 +45,6 @@ func main() {
dst.Clusters = append(dst.Clusters, &localconfig.Cluster{
Name: cluster.Name,
Addons: renderAddons(cluster),
BootstrapPods: renderBootstrapPodsDS(cluster),
})
}

106
cmd/dkl-dir2config/render-cluster.go
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@ -3,12 +3,9 @@ package main
import (
"bytes"
"fmt"
"io"
"log"
"path"
yaml "gopkg.in/yaml.v2"
"novit.tech/direktil/local-server/pkg/clustersconfig"
)
@ -117,106 +114,3 @@ type namePod struct {
Name string
Pod map[string]interface{}
}
func renderBootstrapPods(cluster *clustersconfig.Cluster) (pods []namePod) {
if cluster.BootstrapPods == "" {
return nil
}
bootstrapPods := src.BootstrapPods[cluster.BootstrapPods]
if bootstrapPods == nil {
log.Fatalf("no bootstrap pods template named %q", cluster.BootstrapPods)
}
// render bootstrap pods
parts := bytes.Split(renderClusterTemplates(cluster, "bootstrap-pods", bootstrapPods), []byte("\n---\n"))
for _, part := range parts {
buf := bytes.NewBuffer(part)
dec := yaml.NewDecoder(buf)
for n := 0; ; n++ {
str := buf.String()
podMap := map[string]interface{}{}
err := dec.Decode(podMap)
if err == io.EOF {
break
} else if err != nil {
log.Fatalf("bootstrap pod %d: failed to parse: %v\n%s", n, err, str)
}
if len(podMap) == 0 {
continue
}
if podMap["metadata"] == nil {
log.Fatalf("bootstrap pod %d: no metadata\n%s", n, buf.String())
}
md := podMap["metadata"].(map[interface{}]interface{})
namespace := md["namespace"].(string)
name := md["name"].(string)
pods = append(pods, namePod{namespace, name, podMap})
}
}
return
}
func renderBootstrapPodsDS(cluster *clustersconfig.Cluster) string {
buf := &bytes.Buffer{}
enc := yaml.NewEncoder(buf)
for _, namePod := range renderBootstrapPods(cluster) {
pod := namePod.Pod
md := pod["metadata"].(map[interface{}]interface{})
labels := md["labels"]
if labels == nil {
labels = map[string]interface{}{
"app": namePod.Name,
}
md["labels"] = labels
}
ann := md["annotations"]
annotations := map[interface{}]interface{}{}
if ann != nil {
annotations = ann.(map[interface{}]interface{})
}
annotations["node.kubernetes.io/bootstrap-checkpoint"] = "true"
md["annotations"] = annotations
delete(md, "name")
delete(md, "namespace")
err := enc.Encode(map[string]interface{}{
"apiVersion": "apps/v1",
"kind": "DaemonSet",
"metadata": map[string]interface{}{
"namespace": namePod.Namespace,
"name": namePod.Name,
"labels": labels,
},
"spec": map[string]interface{}{
"minReadySeconds": 60,
"selector": map[string]interface{}{
"matchLabels": labels,
},
"template": map[string]interface{}{
"metadata": pod["metadata"],
"spec": pod["spec"],
},
},
})
if err != nil {
panic(err)
}
}
return buf.String()
}

13
cmd/dkl-dir2config/render-context.go
View File

@ -5,9 +5,11 @@ import (
"crypto/sha1"
"encoding/hex"
"fmt"
"io"
"log"
"path"
"reflect"
"strings"
yaml "gopkg.in/yaml.v2"
@ -154,6 +156,12 @@ func (ctx *renderContext) Config() string {
}
func (ctx *renderContext) renderConfig(configTemplate *clustersconfig.Template) string {
buf := new(strings.Builder)
ctx.renderConfigTo(buf, configTemplate)
return buf.String()
}
func (ctx *renderContext) renderConfigTo(buf io.Writer, configTemplate *clustersconfig.Template) {
ctxName := ctx.Name()
ctxMap := ctx.asMap()
@ -189,7 +197,7 @@ func (ctx *renderContext) renderConfig(configTemplate *clustersconfig.Template)
}
extraFuncs["bootstrap_pods_files"] = func(dir string) (string, error) {
namePods := renderBootstrapPods(ctx.Cluster)
namePods := ctx.renderBootstrapPods()
defs := make([]config.FileDef, 0)
@ -217,12 +225,9 @@ func (ctx *renderContext) renderConfig(configTemplate *clustersconfig.Template)
return hex.EncodeToString(ba[:])
}
buf := bytes.NewBuffer(make([]byte, 0, 4096))
if err := configTemplate.Execute(ctxName, "config", buf, ctxMap, extraFuncs); err != nil {
log.Fatalf("failed to render config %q for host %q: %v", ctx.Group.Config, ctx.Host.Name, err)
}
return buf.String()
}
func (ctx *renderContext) StaticPods() (ba []byte, err error) {

77
cmd/dkl-dir2config/render-host.go Normal file
View File

@ -0,0 +1,77 @@
package main
import (
"bytes"
"fmt"
"io"
"log"
yaml "gopkg.in/yaml.v2"
"novit.tech/direktil/local-server/pkg/clustersconfig"
)
func (ctx *renderContext) renderBootstrapPods() (pods []namePod) {
if ctx.Cluster.BootstrapPods == "" {
return
}
bootstrapPods, ok := src.BootstrapPods[ctx.Cluster.BootstrapPods]
if !ok {
log.Fatalf("no bootstrap pods template named %q", ctx.Cluster.BootstrapPods)
}
// render bootstrap pods
parts := bytes.Split(ctx.renderHostTemplates("bootstrap-pods", bootstrapPods), []byte("\n---\n"))
for _, part := range parts {
buf := bytes.NewBuffer(part)
dec := yaml.NewDecoder(buf)
for n := 0; ; n++ {
str := buf.String()
podMap := map[string]interface{}{}
err := dec.Decode(podMap)
if err == io.EOF {
break
} else if err != nil {
log.Fatalf("bootstrap pod %d: failed to parse: %v\n%s", n, err, str)
}
if len(podMap) == 0 {
continue
}
if podMap["metadata"] == nil {
log.Fatalf("bootstrap pod %d: no metadata\n%s", n, buf.String())
}
md := podMap["metadata"].(map[interface{}]interface{})
namespace := md["namespace"].(string)
name := md["name"].(string)
pods = append(pods, namePod{namespace, name, podMap})
}
}
return
}
func (ctx *renderContext) renderHostTemplates(setName string,
templates []*clustersconfig.Template) []byte {
log.Print("rendering host templates in ", setName)
buf := &bytes.Buffer{}
for _, t := range templates {
log.Print("- template: ", setName, ": ", t.Name)
fmt.Fprintf(buf, "---\n# %s: %s\n", setName, t.Name)
ctx.renderConfigTo(buf, t)
fmt.Fprintln(buf)
}
return buf.Bytes()
}