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update.go
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update.go
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package processmoduleconfig
import (
"io"
"os"
"path/filepath"
dtclient "github.com/Dynatrace/dynatrace-operator/pkg/clients/dynatrace"
"github.com/pkg/errors"
"github.com/spf13/afero"
)
var (
RuxitAgentProcPath = filepath.Join("agent", "conf", "ruxitagentproc.conf")
sourceRuxitAgentProcPath = filepath.Join("agent", "conf", "_ruxitagentproc.conf")
)
func UpdateProcessModuleConfigInPlace(fs afero.Fs, targetDir string, processModuleConfig *dtclient.ProcessModuleConfig) error {
if processModuleConfig != nil {
log.Info("updating ruxitagentproc.conf", "targetDir", targetDir)
usedProcessModuleConfigPath := filepath.Join(targetDir, RuxitAgentProcPath)
sourceProcessModuleConfigPath := filepath.Join(targetDir, sourceRuxitAgentProcPath)
if err := checkProcessModuleConfigCopy(fs, sourceProcessModuleConfigPath, usedProcessModuleConfigPath); err != nil {
return err
}
return Update(fs, sourceProcessModuleConfigPath, usedProcessModuleConfigPath, processModuleConfig.ToMap())
}
log.Info("no changes to ruxitagentproc.conf, skipping update")
return nil
}
func CreateAgentConfigDir(fs afero.Fs, targetDir, sourceDir string, processModuleConfig *dtclient.ProcessModuleConfig) error {
if processModuleConfig != nil {
log.Info("updating ruxitagentproc.conf", "targetDir", targetDir, "sourceDir", sourceDir)
sourceProcessModuleConfigPath := filepath.Join(sourceDir, RuxitAgentProcPath)
destinationProcessModuleConfigPath := filepath.Join(targetDir, RuxitAgentProcPath)
err := fs.MkdirAll(filepath.Dir(destinationProcessModuleConfigPath), 0755)
if err != nil {
log.Info("failed to create directory for destination process module config", "path", filepath.Dir(destinationProcessModuleConfigPath))
return errors.WithStack(err)
}
return Update(fs, sourceProcessModuleConfigPath, destinationProcessModuleConfigPath, processModuleConfig.ToMap())
}
log.Info("no changes to ruxitagentproc.conf, skipping update")
return nil
}
// checkProcessModuleConfigCopy checks if we already made a copy of the original ruxitagentproc.conf file.
// After the initial installation of a version we copy the ruxitagentproc.conf to _ruxitagentproc.conf, and we use the _ruxitagentproc.conf + the api response to re-create the ruxitagentproc.conf
// so it`s easier to update
func checkProcessModuleConfigCopy(fs afero.Fs, sourcePath, destPath string) error {
if _, err := fs.Open(sourcePath); !os.IsNotExist(err) {
return nil
}
log.Info("saving original ruxitagentproc.conf to _ruxitagentproc.conf")
fileInfo, err := fs.Stat(destPath)
if err != nil {
return err
}
sourceProcessModuleConfigFile, err := fs.OpenFile(sourcePath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, fileInfo.Mode())
if err != nil {
return err
}
usedProcessModuleConfigFile, err := fs.Open(destPath)
if err != nil {
return err
}
_, err = io.Copy(sourceProcessModuleConfigFile, usedProcessModuleConfigFile)
if err != nil {
if err := sourceProcessModuleConfigFile.Close(); err != nil {
log.Error(err, "failed to close sourceProcessModuleConfigFile")
}
if err := usedProcessModuleConfigFile.Close(); err != nil {
log.Error(err, "failed to close usedProcessModuleConfigFile")
}
return err
}
if err = sourceProcessModuleConfigFile.Close(); err != nil {
return err
}
return usedProcessModuleConfigFile.Close()
}