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T2486: DNS, vyos-hostsd fixes
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When the 'powersave' option under 'system console' was defined but no actual
serial console device this cause the following error during migration:
Loading configuration from 'config.boot'
Traceback (most recent call last):
File "/opt/vyatta/etc/config-migrate/migrate/system/16-to-17", line 45, in <module>
for device in config.list_nodes(base + ['device']):
File "/usr/lib/python3/dist-packages/vyos/configtree.py", line 236, in list_nodes
raise ConfigTreeError("Path [{}] doesn't exist".format(path_str))
vyos.configtree.ConfigTreeError: Path [b'system console device'] doesn't exist
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Boolean nodes have been removed b/c a boolean value makes less sense. The same
behavior can be achieved with the presence or absence of a node. Unfortunately
the 'autonomous-flag' node has been a negated one which did not migrate
it to 'no-autonomous-flag' if it was set to false previously.
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StartLimitIntervalSec is part of the [Unit] definition and not the [Service]
definition [1]. This caused the following warning message:
systemd[1]: /lib/systemd/system/dhcp6c@.service:12: Unknown lvalue
'StartLimitIntervalSec' in section 'Service', ignoring
This error has been introduced via commit 992d356 ("dhcpv6-pd: T421: workaround
for non existing interfaces").
[1]: https://www.freedesktop.org/software/systemd/man/systemd.unit.html
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When deleting a peth interface the interface name was not added to the
configuration dict, which lead to referencing non existent keys.
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A user can define a port under the SSH node per device. WHen connecting to that
port and authenticating using regular credentials we will immediately drop to
the serial console. This is the same as executing "connect serial-proxy <name>".
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For more examples on the new get_config_dict() approach migrate this
implementation as it is not yet in production use. Also this serves as proof of
concept code for further migrations.
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radvd[31898]: AdvValidLifeTime must be greater than AdvPreferredLifetime in
radvd.conf, line 19
This happens with the following configuration:
vyos@vyos# show service router-advert
interface eth0.20 {
name-server 2001:4860:4860::8888
prefix ::/64 {
valid-lifetime 7200
}
}
A validator is added to solve this issue and radvd will run again.
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l2tp: T2602: Delete excess characters
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For an unknown reason snmpd not always starts after reboot.
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Only IP prefixes are allowed to be added by the CLI thus we can drop the
same check inside the Python script to validate the prefix.
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Commit 5deb12c509be ("ssh: T2321: add VRF support") restructured the Port
assignment (cleanup from the early days) but it accesses a string with methods
used for a list, resulting in the funny default port 2.
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- vyos-hostsd-client syntax changed
- track changes in changes variable
- call apply only once at the end if any changes were made
- remove 'cli-shell-api existsEffective system disable-dhcp-nameservers'
condition check as the functionality was moved into vyos-hostsd
- remove comparison between old_ and new_ variables as it caused a bug
as the nameservers didn't get updated on renew or system restart,
the dhclient lease file persists across reboots, so on boot the old
variables will contain the values from previous dhclient run so they
will usually be equal to the new variables.
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- remove already existing entry check in /etc/hosts as vyos-hostsd will handle it
- vyos-hostsd-client syntax changed
- change tag "DHCP-$client_ip" to "dhcp-server-$client_ip" to make it more
distinct from dhcp client tag "dhcp-$intf"
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- add new commands as arguments
- change boolean options with extra required string options to a single
string option that supports multiple arguments (makes a list)
- track done operations in an extra ops variable (required for apply option)
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Add new nodes for 'service dns forwarding domain':
'addnta': adds addNTA to lua-config-file
'recursion-desired': sets '+' before the zone in forward-zones-file
The migrator sets both options for all configured domains. This is
usually the desired config.
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The previous implementation only supported disabling DHCP nameservers for
all interfaces, and was implemented improperly so it didn't work anyway.
This migrates it to name-servers-dhcp <interface>, which allows us to enable
just the interfaces we want to use for system DNS, identical in syntax to
'service dns forwarding dhcp <interface>'.
The migrator searches through all interfaces that have address 'dhcp(v6)?'
and adds them to the name-servers-dhcp list if disable-dhcp-nameservers is
not set, else it does nothing.
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It shouldn't be required, if necessary it should be added to
vyos-hostsd apply command.
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Removes and adds all required settings.
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The getter methods will return empty values if config nodes don't exist,
so there's no point in checking if they exist before.
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Init Config once in main() and pass it to both get_config() and verify().
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The previous implementation only supported disabling DHCP nameservers for all
interfaces, and was implemented improperly so it didn't work anyway.
It's safe to remove it completely.
This adds support for a new config node name-servers-dhcp <interface>, which
allows us to enable just the interfaces we want to use for system DNS,
identical in syntax to 'service dns forwarding dhcp <interface>'.
The new option works by adding tags to vyos-hostsd that we want to use to add
nameservers to resolv.conf, same as adding tags for dns forwarding but for a
different destination file.
A config migrator will be added in a separate commit.
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Debian Buster doesn't have the length and character limitations of
/etc/resolv.conf 'search' any more, it is unlimited.
https://sourceware.org/bugzilla/show_bug.cgi?id=19569
(glibc >2.26)
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Change internal representation to the one required by vyos-hostsd.
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