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Streamline configuration and operation of dns forwarding service in
following ways:
- Remove `dns_forwarding_reset.py` as its functionality is now covered
by `dns.py`
- Adjust function names in `dns.py` to disambiguate between DNS
forwarding and dynamic DNS
- Remove `dns_forwarding_restart.sh` as its functionality is inlined in
`dns-forwarding.xml`
- Templatize systemd override for `pdns-recursor.service` and move the
generated override files in /run. This ensures that the override files
are always generated afresh after boot
- Simplify the systemd override file by removing the redundant overrides
- Relocate configuration path for pdns-recursor to `/run/pdns-recursor`
and utilize the `RuntimeDirectory` default that pdns-recursor expects
- We do not need to use custom `--socket-dir` path anymore, the default
path (viz., `/run/pdns-recursor` is fine)
(cherry picked from commit 1c1fb5fb4bd7c0d205b28caf90357ad56423464f)
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* T5195: move run, cmd, call, rc_cmd helper to vyos.utils.process
* T5195: use read_file and write_file implementation from vyos.utils.file
Changed code automatically using:
find . -type f -not -path '*/\.*' -exec sed -i 's/^from vyos.util import read_file$/from vyos.utils.file import read_file/g' {} +
find . -type f -not -path '*/\.*' -exec sed -i 's/^from vyos.util import write_file$/from vyos.utils.file import write_file/g' {} +
* T5195: move chmod* helpers to vyos.utils.permission
* T5195: use colon_separated_to_dict from vyos.utils.dict
* T5195: move is_systemd_service_* to vyos.utils.process
* T5195: fix boot issues with missing imports
* T5195: move dict_search_* helpers to vyos.utils.dict
* T5195: move network helpers to vyos.utils.network
* T5195: move commit_* helpers to vyos.utils.commit
* T5195: move user I/O helpers to vyos.utils.io
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This would allow using custom ports in name server operating on non-
default port for forwarding zones.
This is a follow-up to T5113 for sake of completeness and having
consistent treatment of all name servers configured in PowerDNS recursor.
Additionally, migrate `service dns forwarding domain example.com server`
to `service dns forwarding domain foo3.com name-server` for consistency
and reusability.
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This reverts commit 44df1cea1ebc3296844c5c35cf053a92cda4b944.
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This reverts commit ff09d4f47e5f54fad8258cd27fb0adfaa4c552b3.
Process name is actually:
<bound method Process.name of psutil.Process(pid=5031, name='pdns-r/worker', status='sleeping', started='08:51:51')>
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PowerDNS version 4.7 and above has changed the main process name from
'pdns-r/worker' to 'pdns_recursor'. This commit updates the process
name check to use the new name.
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This prevented VyOS to actually boot as the configuration could not be
loaded, as "system host-name" was unable to commit.
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T562: Config syntax for defining DNS forward authoritative zones
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- update copyright date
- validate incoming JSON data against a schema with voluptuous
- add usage help describing internal messages syntax at top of vyos-hostsd
- move socket and state file to directory /run/vyos-hostsd
- replace jinja2 rendering with vyos.template
- move all templates out of the executable into dedicated data/templates dirs
- move recursor.conf forward-zones-recurse to forward-zones-file
- generate lua-config-file for pdns-recursor with addNTA
- support adding custom forward zones for pdns-recursor with optional added NTA and/or recursion-desired
- move search_domains from set_host_name to separate add/delete/get commands
- unify functions to support abstracting them in the future
- track number of internal changes in "changes" variable saved in state file (informational in apply function)
- do not apply changes immediately, add apply function that applies all changes (to not reload pdns-recursor excessively for a large set of changes, users must call the apply function once at the end)
- add pdns_rec_control function that supports sending arbitrary commands to rec_control (fix pdns-recursor process name that caused the old function to think pdns-recursor was never running)
- create /run/powerdns if it doesn't exist (on boot vyos-hostsd starts before pdns-recursor but we need to put our generated conf files there)
- abstract specific command functions (add_*/del_*) into general functions to manipulate various types of data in the state variable
- add command types:
- forward_zones (generate custom forward zones for pdns-recursor)
- search_domains (move from set_host_name as dhcp client needs to change them too)
- name_server_tags_recursor (to set tags whose nameservers are added to pdns-recursor)
- name_server_tags_system (to set tags whose nameservers and search domains are added to /etc/resolv.conf)
- change hosts data format to make more sense (move tag from within each host dict to the key for a list of host dicts)
- do not remove state file when shut down cleanly, to not lose state when restarting vyos-hostsd service that's then impossible to restore without restarting the whole router - a reboot will remove the state file as it lives in a tmpfs (/run)
- remove too verbose info log on every received message
- set mode of socket to 770 to secure it against processes not in hostsd group
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The DHCP server is unable to apply entries to the hosts file because the permissions on the socket are getting created wrong.
```
$ ls -al /run/vyos-hostsd.sock
srwxrwxrwx 1 root vyattacfg 0 May 20 01:38 /run/vyos-hostsd.sock
```
This gives it the correct permissions so that the nobody/nobody user/group can change it.
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Please refer to https://phabricator.vyos.net/T2311
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In case if stdout PIPE were lost (for example, after systemd-journald restart), using print() will raise the exception.
This patch replaces print() to logging function, which is not sensitive to this problem. This makes vyos-hostd resistant to stdout disconnection, but of course, all logs after stdout disconnection will be lost.
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