[Kea-users] Hook Libraries logging not Initialized

[Joe Wilner]

Hi --

I'm attempting to build a docker container of Kea 1.4.0 and hitting an
issue around logging initialization when attempting to load hook libraries.

The relevant bits of the Dockerfile:
```
FROM ubuntu:18.04

RUN apt-get update && apt-get install -y --no-install-recommends libtool
autoconf g++ libssl-dev liblog4cplus-dev libboost-system-dev

WORKDIR /build/

RUN wget https://www.isc.org/downloads/file/kea-1-4-0-p1/?version=tar-gz -O
kea.tar.gz \
  && mkdir kea && tar -C kea --strip-components=1 -xzf kea.tar.gz \
  && cd kea && ./configure --enable-shell --enable-static-link \
  && make -j $(getconf _NPROCESSORS_ONLN) -l $(getconf _NPROCESSORS_ONLN)
&& make install \
  && cd /build/ \
  && rm -r kea*
  && ldconfig
```

When I run `kea-dhcp4` with the following config:
```
{
    "Dhcp4": {
            "hooks-libraries": [{
                "library": "/usr/local/lib/hooks/libdhcp_lease_cmds.so"
            }],
            "control-socket": {
                "socket-type": "unix",
                "socket-name": "/tmp/kea-dhcp4-ctrl.sock"
            },
            "lease-database": {
                ...
            },
            "expired-leases-processing": {
                ...
            },
            ...
    },
    "Logging": {
            "loggers": [
            {
                "name": "kea-dhcp4",
                "output_options": [
                { "output": "stdout" }
                ],
                "severity": "INFO",
                "debuglevel": 0
            }
            ]
        }
}
```

I get an error as follows:
```
2019-01-22 20:44:22.375 ERROR [kea-dhcp4.hooks/142]
HOOKS_LOAD_FRAMEWORK_EXCEPTION 'load' function in hook library
/usr/local/lib/hooks/libdhcp_lease_cmds.so threw an exception: reason
attempt to access logging function before logging has been initialized
2019-01-22 20:44:22.375 ERROR [kea-dhcp4.hooks/142]
HOOKS_UNLOAD_FRAMEWORK_EXCEPTION 'unload' function in hook library
/usr/local/lib/hooks/libdhcp_lease_cmds.so threw an exception, reason
attempt to access logging function before logging has been initialized
2019-01-22 20:44:22.375 ERROR [kea-dhcp4.dhcp4/142]
DHCP4_PARSER_COMMIT_FAIL parser failed to commit changes: One or more hook
libraries failed to load
2019-01-22 20:44:22.376 ERROR [kea-dhcp4.dhcp4/142] DHCP4_CONFIG_LOAD_FAIL
configuration error using file: /usr/local/etc/kea/kea-dhcp4.conf, reason:
One or more hook libraries failed to load
2019-01-22 20:44:22.376 ERROR [kea-dhcp4.dhcp4/142] DHCP4_INIT_FAIL failed
to initialize Kea server: configuration error using file
'/usr/local/etc/kea/kea-dhcp4.conf': One or more hook libraries failed to
load
```

My instinct is that this is an issue with the linking but `ldconfig -p`
looks as I would expect.

Any advice or help would be appreciated.

Thanks,
Joe
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