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script.go
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script.go
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// Copyright © 2017 The Kubicorn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package script
import (
"encoding/json"
"github.com/kubicorn/kubicorn/apis/cluster"
"github.com/kubicorn/kubicorn/pkg/parser"
)
const (
kubicornDir = "/etc/kubicorn"
bootstrapInitScript = "bootstrap_init.sh"
clusterAsJSONFileName = "cluster.json"
bootstrapInitScriptBase = `#!/usr/bin/env bash
#----------------------------------------------------------
# Used only to set shebang and other environmenty things
# and is added to the beginning of other bootstrap scripts,
# including the generated "write the cluster as json" one
# to create a single user-data script for cloud providers
#----------------------------------------------------------
set -e
cd ~
`
)
func BuildBootstrapScript(bootstrapScripts []string, cluster *cluster.Cluster) ([]byte, error) {
userData := []byte{}
scriptData, err := buildBootstrapSetupScript(cluster, kubicornDir, clusterAsJSONFileName)
if err != nil {
return nil, err
}
userData = append(userData, scriptData...)
for _, bootstrapScript := range bootstrapScripts {
scriptData, err := fileresource.ReadFromResource(bootstrapScript)
if err != nil {
return nil, err
}
userData = append(userData, scriptData...)
}
return userData, nil
}
func buildBootstrapSetupScript(cluster *cluster.Cluster, dir, file string) ([]byte, error) {
userData := []byte(bootstrapInitScriptBase)
script := []byte("mkdir -p " + dir + "\ncat <<\"EOF\" > " + dir + "/" + file + "\n")
clusterJSON, err := json.Marshal(cluster)
if err != nil {
return nil, err
}
userData = append(userData, script...)
userData = append(userData, clusterJSON...)
userData = append(userData, []byte("\nEOF\n")...)
return userData, nil
}