diff options
| author | zsdc <taras@vyos.io> | 2021-12-30 00:41:31 +0200 |
|---|---|---|
| committer | zsdc <taras@vyos.io> | 2021-12-30 00:41:31 +0200 |
| commit | ce77935eeeabcbb8d3510d09d12e0d79e74ad045 (patch) | |
| tree | 4be24440155d97a62a5ae1177c677728f2f64d98 /src/etc/dhcp/dhclient-enter-hooks.d | |
| parent | 6414138a9c5bc55c5a0037ffa523a14b76e814af (diff) | |
| download | vyos-1x-ce77935eeeabcbb8d3510d09d12e0d79e74ad045.tar.gz vyos-1x-ce77935eeeabcbb8d3510d09d12e0d79e74ad045.zip | |
dhclient: T4121: Fixed resolv.conf generation at early boot stage
In case if a CLI configuration is not available, dhclient cannot add
nameservers to a `resolv.conf` file, because `vyos-hostsd` requires that
an interface be listed in the `set system name-server` option.
This commit introduces two changes:
* `vyos-hostsd` service will not be started before Cloud-Init fetch all
remote data. This is required because all meta-data should be available
for Cloud-Init before any of VyOS-related services start since it is
used for configuration generation.
* the `vyos-hostsd-client` in the `dhclient-script` will be used only if
the `vyos-hostsd` is running. In other words - if VyOS services already
started, dhclient changes `resolv.conf` using `vyos-hostsd`; in other
cases - does this directly.
These changes should protect us from problems with DHCP during system
boot if DHCP is required by third-party utils.
Diffstat (limited to 'src/etc/dhcp/dhclient-enter-hooks.d')
| -rw-r--r-- | src/etc/dhcp/dhclient-enter-hooks.d/04-vyos-resolvconf | 82 |
1 files changed, 43 insertions, 39 deletions
diff --git a/src/etc/dhcp/dhclient-enter-hooks.d/04-vyos-resolvconf b/src/etc/dhcp/dhclient-enter-hooks.d/04-vyos-resolvconf index 24090e2a8..b1902b585 100644 --- a/src/etc/dhcp/dhclient-enter-hooks.d/04-vyos-resolvconf +++ b/src/etc/dhcp/dhclient-enter-hooks.d/04-vyos-resolvconf @@ -1,44 +1,48 @@ -# modified make_resolv_conf () for VyOS -make_resolv_conf() { - hostsd_client="/usr/bin/vyos-hostsd-client" - hostsd_changes= +# modified make_resolv_conf() for VyOS +# should be used only if vyos-hostsd is running - if [ -n "$new_domain_name" ]; then - logmsg info "Deleting search domains with tag \"dhcp-$interface\" via vyos-hostsd-client" - $hostsd_client --delete-search-domains --tag "dhcp-$interface" - logmsg info "Adding domain name \"$new_domain_name\" as search domain with tag \"dhcp-$interface\" via vyos-hostsd-client" - $hostsd_client --add-search-domains "$new_domain_name" --tag "dhcp-$interface" - hostsd_changes=y - fi +if /usr/bin/systemctl -q is-active vyos-hostsd; then + make_resolv_conf() { + hostsd_client="/usr/bin/vyos-hostsd-client" + hostsd_changes= - if [ -n "$new_dhcp6_domain_search" ]; then - logmsg info "Deleting search domains with tag \"dhcpv6-$interface\" via vyos-hostsd-client" - $hostsd_client --delete-search-domains --tag "dhcpv6-$interface" - logmsg info "Adding search domain \"$new_dhcp6_domain_search\" with tag \"dhcpv6-$interface\" via vyos-hostsd-client" - $hostsd_client --add-search-domains "$new_dhcp6_domain_search" --tag "dhcpv6-$interface" - hostsd_changes=y - fi + if [ -n "$new_domain_name" ]; then + logmsg info "Deleting search domains with tag \"dhcp-$interface\" via vyos-hostsd-client" + $hostsd_client --delete-search-domains --tag "dhcp-$interface" + logmsg info "Adding domain name \"$new_domain_name\" as search domain with tag \"dhcp-$interface\" via vyos-hostsd-client" + $hostsd_client --add-search-domains "$new_domain_name" --tag "dhcp-$interface" + hostsd_changes=y + fi - if [ -n "$new_domain_name_servers" ]; then - logmsg info "Deleting nameservers with tag \"dhcp-$interface\" via vyos-hostsd-client" - $hostsd_client --delete-name-servers --tag "dhcp-$interface" - logmsg info "Adding nameservers \"$new_domain_name_servers\" with tag \"dhcp-$interface\" via vyos-hostsd-client" - $hostsd_client --add-name-servers $new_domain_name_servers --tag "dhcp-$interface" - hostsd_changes=y - fi + if [ -n "$new_dhcp6_domain_search" ]; then + logmsg info "Deleting search domains with tag \"dhcpv6-$interface\" via vyos-hostsd-client" + $hostsd_client --delete-search-domains --tag "dhcpv6-$interface" + logmsg info "Adding search domain \"$new_dhcp6_domain_search\" with tag \"dhcpv6-$interface\" via vyos-hostsd-client" + $hostsd_client --add-search-domains "$new_dhcp6_domain_search" --tag "dhcpv6-$interface" + hostsd_changes=y + fi - if [ -n "$new_dhcp6_name_servers" ]; then - logmsg info "Deleting nameservers with tag \"dhcpv6-$interface\" via vyos-hostsd-client" - $hostsd_client --delete-name-servers --tag "dhcpv6-$interface" - logmsg info "Adding nameservers \"$new_dhcpv6_name_servers\" with tag \"dhcpv6-$interface\" via vyos-hostsd-client" - $hostsd_client --add-name-servers $new_dhcpv6_name_servers --tag "dhcpv6-$interface" - hostsd_changes=y - fi + if [ -n "$new_domain_name_servers" ]; then + logmsg info "Deleting nameservers with tag \"dhcp-$interface\" via vyos-hostsd-client" + $hostsd_client --delete-name-servers --tag "dhcp-$interface" + logmsg info "Adding nameservers \"$new_domain_name_servers\" with tag \"dhcp-$interface\" via vyos-hostsd-client" + $hostsd_client --add-name-servers $new_domain_name_servers --tag "dhcp-$interface" + hostsd_changes=y + fi - if [ $hostsd_changes ]; then - logmsg info "Applying changes via vyos-hostsd-client" - $hostsd_client --apply - else - logmsg info "No changes to apply via vyos-hostsd-client" - fi -} + if [ -n "$new_dhcp6_name_servers" ]; then + logmsg info "Deleting nameservers with tag \"dhcpv6-$interface\" via vyos-hostsd-client" + $hostsd_client --delete-name-servers --tag "dhcpv6-$interface" + logmsg info "Adding nameservers \"$new_dhcpv6_name_servers\" with tag \"dhcpv6-$interface\" via vyos-hostsd-client" + $hostsd_client --add-name-servers $new_dhcpv6_name_servers --tag "dhcpv6-$interface" + hostsd_changes=y + fi + + if [ $hostsd_changes ]; then + logmsg info "Applying changes via vyos-hostsd-client" + $hostsd_client --apply + else + logmsg info "No changes to apply via vyos-hostsd-client" + fi + } +fi |