dynamically determine network backend
This commit is contained in:
parent
dac1b10c5d
commit
d4a0ef034c
6
Makefile
6
Makefile
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@ -4,10 +4,14 @@ LIBGUESTFS_PATH = guestfs/appliance
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LIBGUESTFS_HV = scripts/qemu.sh
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APPLIANCE_VERSION = 1.46.0
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ifeq ($(shell test -e $(DEPS_DIR)/usr/lib/x86_64-linux-gnu/libvirt.so.0 && echo -n yes),yes)
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CGO_LDFLAGS = -lvirt -lyajl
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endif
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# Export LIBGUESTFS_DEBUG=1 to debug
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all:
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LIBRARY_PATH=$(LIBRARY_PATH) go build
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LIBRARY_PATH=$(LIBRARY_PATH) CGO_LDFLAGS="$(CGO_LDFLAGS)" go build
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run:
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LD_LIBRARY_PATH=$(LIBRARY_PATH) LIBGUESTFS_PATH=$(LIBGUESTFS_PATH) LIBGUESTFS_HV=$(LIBGUESTFS_HV) LIBGUESTFS_BACKEND_SETTINGS=force_tcg ./cloudbuild
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@ -68,8 +68,8 @@ func (mgr *AlmaLinuxTemplateManager) DownloadTemplate(version, codename string)
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return mgr.DownloadTemplateGeneric(filename, url)
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}
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func (mgr *AlmaLinuxTemplateManager) addCloudInitSnippet(handle *guestfs.Guestfs) error {
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path := "/etc/cloud/cloud.cfg.d/99_csclub.cfg"
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func (mgr *AlmaLinuxTemplateManager) addAlmaLinuxCloudInitSnippet(handle *guestfs.Guestfs) error {
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path := "/etc/cloud/cloud.cfg.d/99_csclub_misc.cfg"
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mgr.logger.Debug().Msg("Writing to " + path)
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return handle.Write(path, getResource("fedora-cloud-init"))
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}
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@ -92,13 +92,7 @@ func (mgr *AlmaLinuxTemplateManager) transformAlmaLinuxYumRepoBaseUrl(url string
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}
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func (mgr *AlmaLinuxTemplateManager) PerformDistroSpecificModifications(handle *guestfs.Guestfs) (err error) {
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if err = mgr.setChronyOptions(handle); err != nil {
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return
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}
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if err = mgr.setNetworkManagerOptions(handle); err != nil {
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return
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}
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if err = mgr.addCloudInitSnippet(handle); err != nil {
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if err = mgr.addAlmaLinuxCloudInitSnippet(handle); err != nil {
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return
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}
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if err = mgr.replaceYumMirrorUrls(handle, mgr.transformAlmaLinuxYumRepoBaseUrl); err != nil {
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@ -75,15 +75,6 @@ func (mgr *DebianTemplateManager) CommandToUpdatePackageCache() []string {
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return debianCommandToUpdatePackageCache()
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}
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func (mgr *DebianTemplateManager) PerformDistroSpecificModifications(handle *guestfs.Guestfs) (err error) {
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if err = mgr.setChronyOptions(handle); err != nil {
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return
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}
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if err = mgr.setDhclientOptions(handle); err != nil {
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return
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}
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if err = mgr.replaceDebianMirrorUrls(handle); err != nil {
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return
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}
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return
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func (mgr *DebianTemplateManager) PerformDistroSpecificModifications(handle *guestfs.Guestfs) error {
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return mgr.replaceDebianMirrorUrls(handle)
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}
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@ -113,8 +113,8 @@ func (mgr *FedoraTemplateManager) DownloadTemplate(version, codename string) (pa
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return mgr.DownloadTemplateGeneric(filename, url)
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}
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func (mgr *FedoraTemplateManager) addCloudInitSnippet(handle *guestfs.Guestfs) error {
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path := "/etc/cloud/cloud.cfg.d/99_csclub.cfg"
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func (mgr *FedoraTemplateManager) addFedoraCloudInitSnippet(handle *guestfs.Guestfs) error {
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path := "/etc/cloud/cloud.cfg.d/99_csclub_misc.cfg"
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mgr.logger.Debug().Msg("Writing to " + path)
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return handle.Write(path, getResource("fedora-cloud-init"))
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}
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@ -137,13 +137,7 @@ func (mgr *FedoraTemplateManager) transformFedoraYumRepoBaseUrl(url string) stri
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}
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func (mgr *FedoraTemplateManager) PerformDistroSpecificModifications(handle *guestfs.Guestfs) (err error) {
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if err = mgr.setChronyOptions(handle); err != nil {
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return
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}
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if err = mgr.setNetworkManagerOptions(handle); err != nil {
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return
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}
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if err = mgr.addCloudInitSnippet(handle); err != nil {
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if err = mgr.addFedoraCloudInitSnippet(handle); err != nil {
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return
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}
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if err = mgr.replaceYumMirrorUrls(handle, mgr.transformFedoraYumRepoBaseUrl); err != nil {
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@ -97,9 +97,6 @@ func (mgr *OpensuseTumbleweedTemplateManager) CommandToUpdatePackageCache() []st
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}
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func (mgr *OpensuseTumbleweedTemplateManager) PerformDistroSpecificModifications(handle *guestfs.Guestfs) (err error) {
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if err = mgr.setChronyOptions(handle); err != nil {
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return
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}
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if err = mgr.maskSystemdUnit(handle, "wickedd-dhcp6.service"); err != nil {
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return
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}
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@ -0,0 +1,8 @@
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network:
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version: 2
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ethernets:
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id0:
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match:
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name: e*
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dhcp4: true
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accept-ra: false
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@ -1,11 +1,2 @@
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network:
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version: 2
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ethernets:
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id0:
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match:
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name: e*
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dhcp4: true
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accept-ra: false
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apt_preserve_sources_list: true
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manage_etc_hosts: true
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@ -106,12 +106,18 @@ func fedoraCommandToUpdatePackageCache() []string {
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}
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func (mgr *TemplateManager) performDistroAgnosticModifications(handle *guestfs.Guestfs) (err error) {
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if err = mgr.setupCommonNetworkConfigs(handle); err != nil {
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return
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}
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if err = mgr.setupIpv6Scripts(handle); err != nil {
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return
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}
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if err = mgr.setResolvConf(handle); err != nil {
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return
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}
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if err = mgr.setupCommonNTPConfigs(handle); err != nil {
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return
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}
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if err = mgr.setMotd(handle); err != nil {
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return
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}
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@ -242,6 +248,33 @@ func (mgr *TemplateManager) maskSystemdUnit(handle *guestfs.Guestfs, unit string
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return handle.Ln_sf("/dev/null", "/etc/systemd/system/"+unit)
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}
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func systemdServiceIsEnabled(handle *guestfs.Guestfs, unit string) (bool, error) {
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linkName := ""
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for _, dirPrefix := range []string{"/etc", "/lib"} {
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linkName = dirPrefix + "/systemd/system/multi-user.target.wants/" + unit
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isSymlink, err := handle.Is_symlink(linkName)
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if err != nil {
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return false, fmt.Errorf("could not determine if %s is a symlink: %w", linkName, err)
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}
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if isSymlink {
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break
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}
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}
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if linkName == "" {
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return false, nil
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}
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target, err := handle.Readlink(linkName)
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if err != nil {
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return false, fmt.Errorf("could not read link at %s: %w", linkName, err)
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}
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for _, dirPrefix := range []string{"/etc", "/lib"} {
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if target == dirPrefix+"/systemd/system/"+unit {
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return true, nil
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}
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}
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return false, nil
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}
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// setChronyOptions sets custom NTP server URLs in a chrony config file.
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func (mgr *TemplateManager) setChronyOptions(handle *guestfs.Guestfs) (err error) {
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possiblePaths := []string{"/etc/chrony.conf", "/etc/chrony/chrony.conf"}
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@ -315,8 +348,7 @@ func (mgr *TemplateManager) setChronyOptions(handle *guestfs.Guestfs) (err error
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// Otherwise, assume we need to modify chrony.conf directly
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// e.g. Fedora
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if newLines == nil {
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mgr.logger.Warn().Msg("could not find chrony.conf, skipping")
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return
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return errors.New("could not find chrony.conf")
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}
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serverDirectiveExists := false
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for _, line := range newLines {
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@ -334,6 +366,45 @@ func (mgr *TemplateManager) setChronyOptions(handle *guestfs.Guestfs) (err error
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return handle.Write(path, []byte(newContent))
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}
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func (mgr *TemplateManager) setTimesyncdConf(handle *guestfs.Guestfs) (err error) {
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mgr.logger.Debug().Msg("Writing custom timesyncd.conf")
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if err = handle.Mkdir_p("/etc/systemd/timesyncd.conf.d"); err != nil {
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return
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}
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return handle.Write("/etc/systemd/timesyncd.conf.d/csclub.conf", getResource("timesyncd.conf"))
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}
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func usesChrony(handle *guestfs.Guestfs) (bool, error) {
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// The systemd service for chrony is called on chrony.service on e.g. Debian,
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// but is called chronyd.service on e.g. Fedora
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chronyIsEnabled, err := systemdServiceIsEnabled(handle, "chrony.service")
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if err != nil {
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return false, err
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}
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if chronyIsEnabled {
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return true, nil
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}
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return systemdServiceIsEnabled(handle, "chronyd.service")
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}
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func (mgr *TemplateManager) setupCommonNTPConfigs(handle *guestfs.Guestfs) error {
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usesChrony, err := usesChrony(handle)
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if err != nil {
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return err
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}
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if usesChrony {
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return mgr.setChronyOptions(handle)
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}
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usesSystemdTimesyncd, err := systemdServiceIsEnabled(handle, "systemd-timesyncd.service")
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if err != nil {
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return err
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}
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if usesSystemdTimesyncd {
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return mgr.setTimesyncdConf(handle)
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}
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return errors.New("could not determine NTP backend")
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}
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func (mgr *TemplateManager) setNetworkManagerOptions(handle *guestfs.Guestfs) (err error) {
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if err = handle.Mkdir_p("/etc/NetworkManager/conf.d"); err != nil {
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return
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@ -344,7 +415,54 @@ func (mgr *TemplateManager) setNetworkManagerOptions(handle *guestfs.Guestfs) (e
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}
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func usesNetworkManager(handle *guestfs.Guestfs) (bool, error) {
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return handle.Is_file("/usr/sbin/NetworkManager", nil)
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return systemdServiceIsEnabled(handle, "NetworkManager.service")
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}
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func usesEtcNetworkInterfaces(handle *guestfs.Guestfs) (bool, error) {
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configPath := "/etc/network/interfaces"
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configExists, err := handle.Is_file(configPath, nil)
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if err != nil {
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return false, fmt.Errorf("Could not determine if "+configPath+" is a file: %w", err)
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}
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if !configExists {
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return false, nil
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}
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return systemdServiceIsEnabled(handle, "networking.service")
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}
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func (mgr *TemplateManager) addSystemdNetworkdCloudInitSnippet(handle *guestfs.Guestfs) error {
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// Use 98 so that each distro can use 99 for extra customization
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path := "/etc/cloud/cloud.cfg.d/98_csclub_network.cfg"
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mgr.logger.Debug().Msg("Writing to " + path)
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return handle.Write(path, getResource("systemd-networkd-cloud-init"))
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}
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func (mgr *TemplateManager) setupCommonNetworkConfigs(handle *guestfs.Guestfs) error {
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usesNetworkManager, err := usesNetworkManager(handle)
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if err != nil {
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return err
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}
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if usesNetworkManager {
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return mgr.setNetworkManagerOptions(handle)
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}
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usesSystemdNetworkd, err := systemdServiceIsEnabled(handle, "systemd-networkd.service")
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if err != nil {
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return err
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}
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if usesSystemdNetworkd {
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return mgr.addSystemdNetworkdCloudInitSnippet(handle)
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}
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usesEtcNetworkInterfaces, err := usesEtcNetworkInterfaces(handle)
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if err != nil {
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return err
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}
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if usesEtcNetworkInterfaces {
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return mgr.setDhclientOptions(handle)
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}
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// The only other network backend used by one of our supported distros is
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// Sysconfig, which is currently only used by OpenSUSE Tumbleweed.
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// That case is handled separately in opensuse_tumbleweed.go.
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return nil
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}
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func (mgr *TemplateManager) setupIpv6Scripts(handle *guestfs.Guestfs) (err error) {
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@ -703,14 +821,6 @@ func (mgr *TemplateManager) updateSshdConfig(handle *guestfs.Guestfs) error {
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return handle.Aug_set("/files/etc/ssh/sshd_config/PrintLastLog", "no")
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}
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func (mgr *TemplateManager) setTimesyncdConf(handle *guestfs.Guestfs) (err error) {
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mgr.logger.Debug().Msg("Writing custom timesyncd.conf")
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if err = handle.Mkdir_p("/etc/systemd/timesyncd.conf.d"); err != nil {
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return
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}
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return handle.Write("/etc/systemd/timesyncd.conf.d/csclub.conf", getResource("timesyncd.conf"))
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}
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func (mgr *TemplateManager) setJournaldConf(handle *guestfs.Guestfs) (err error) {
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mgr.logger.Debug().Msg("Writing custom journald.conf")
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if err = handle.Mkdir_p("/etc/systemd/journald.conf.d"); err != nil {
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@ -79,8 +79,8 @@ func (mgr *UbuntuTemplateManager) DownloadTemplate(version, codename string) (pa
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return mgr.DownloadTemplateGeneric(filename, url)
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}
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func (mgr *UbuntuTemplateManager) addCloudInitSnippet(handle *guestfs.Guestfs) error {
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path := "/etc/cloud/cloud.cfg.d/99_csclub.cfg"
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func (mgr *UbuntuTemplateManager) addUbuntuCloudInitSnippet(handle *guestfs.Guestfs) error {
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path := "/etc/cloud/cloud.cfg.d/99_csclub_misc.cfg"
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mgr.logger.Debug().Msg("Writing to " + path)
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return handle.Write(path, getResource("ubuntu-cloud-init"))
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}
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@ -109,16 +109,10 @@ func (mgr *UbuntuTemplateManager) CommandToUpdatePackageCache() []string {
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}
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func (mgr *UbuntuTemplateManager) PerformDistroSpecificModifications(handle *guestfs.Guestfs) (err error) {
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if err = mgr.setTimesyncdConf(handle); err != nil {
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return
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}
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if err = mgr.setDhclientOptions(handle); err != nil {
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return
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}
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if err = mgr.replaceDebianMirrorUrls(handle); err != nil {
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return
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}
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if err = mgr.addCloudInitSnippet(handle); err != nil {
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if err = mgr.addUbuntuCloudInitSnippet(handle); err != nil {
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return
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}
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mgr.disableNoisyMotdMessages(handle)
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@ -27,6 +27,7 @@ libvirt_dependencies=(
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libvdeplug2
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libvirglrenderer1
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libvirt0
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libvirt-dev
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libxencall1
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libxendevicemodel1
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libxenevtchn1
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@ -37,6 +38,7 @@ libvirt_dependencies=(
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libxentoolcore1
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libxentoollog1
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libyajl2
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libyajl-dev
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qemu-system-x86
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seabios
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)
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Reference in New Issue