log: switch to slog

[pulsejet]

Looking to take a simpler approach here similar to what Android does.

Each log message has a

1. tag (fixed string or stringable interface)
2. message (fixed string)
3. args (variable)

Example usage:

// Log is *log.Logger
// y can be nil or a string, or String() interface
core.Log.Info(y, "Created multicast UDP face", "uri", uri)

Output (level=INFO)

time=2025-01-13T21:06:18.161Z level=INFO msg="Starting NDN forwarder" tag=YaNFD
time=2025-01-13T21:06:18.162Z level=INFO msg="Created unicast UDP listener" tag=YaNFD uri=udp://0.0.0.0:6363
time=2025-01-13T21:06:18.162Z level=INFO msg="Created unicast UDP listener" tag=YaNFD uri=udp://[::]:6363
time=2025-01-13T21:06:18.162Z level=INFO msg="Created Unix stream listener" tag=YaNFD uri=/run/nfd/nfd.sock
time=2025-01-13T21:06:18.162Z level=INFO msg="Starting management thread" tag=Mgmt
time=2025-01-13T21:06:18.163Z level=INFO msg=Listening tag="UnixStreamListener, unix:///run/nfd/nfd.sock"
time=2025-01-13T21:06:20.488Z level=INFO msg="Accepting new Unix stream face" tag="UnixStreamListener, unix:///run/nfd/nfd.sock" uri=fd://1
time=2025-01-13T21:06:20.490Z level=INFO msg="Set strategy" tag=StrategyChoiceMgmt name=/ndn/svs strategy="/localhost/nfd/strategy/multicast/v=1"
time=2025-01-13T21:06:20.491Z level=INFO msg="Unregistered FaceID" tag=FaceTable faceid=3
time=2025-01-13T21:06:41.628Z level=INFO msg="Accepting new Unix stream face" tag="UnixStreamListener, unix:///run/nfd/nfd.sock" uri=fd://2
time=2025-01-13T21:06:41.630Z level=INFO msg="Created route" tag=RIBMgmt name=/ndn/svs faceid=4 origin=0 cost=0 flags=1
time=2025-01-13T21:06:43.629Z level=INFO msg="Accepting new Unix stream face" tag="UnixStreamListener, unix:///run/nfd/nfd.sock" uri=fd://3
time=2025-01-13T21:06:43.630Z level=INFO msg="Created route" tag=RIBMgmt name=/ndn/svs faceid=5 origin=0 cost=0 flags=1
time=2025-01-13T21:06:51.379Z level=INFO msg="Unregistered FaceID" tag=FaceTable faceid=5
time=2025-01-13T21:06:51.848Z level=INFO msg="Unregistered FaceID" tag=FaceTable faceid=4
time=2025-01-13T21:07:40.721Z level=INFO msg="received signal - exit" tag=YaNFD signal=interrupt
time=2025-01-13T21:07:40.721Z level=INFO msg="Stopping NDN forwarder" tag=YaNFD
time=2025-01-13T21:07:40.721Z level=INFO msg="Told to quit" tag=FwThread-0
time=2025-01-13T21:07:40.721Z level=INFO msg="Told to quit" tag=FwThread-1
time=2025-01-13T21:07:40.721Z level=INFO msg="Stopping thread" tag=FwThread-1
time=2025-01-13T21:07:40.722Z level=INFO msg="Face quit, so management quitting" tag=Mgmt
time=2025-01-13T21:07:40.721Z level=INFO msg="Unregistered FaceID" tag=FaceTable faceid=1
time=2025-01-13T21:07:40.722Z level=INFO msg="Stopping thread" tag=FwThread-0

Output (level=TRACE) (WIP)

time=2025-01-13T21:11:20.102Z level=INFO msg="Starting NDN forwarder" tag=YaNFD source=github.com/named-data/ndnd/fw/executor.(*YaNFD).Start
time=2025-01-13T21:11:20.104Z level=DEBUG msg="[FaceTable] Registered FaceID=1" source=github.com/named-data/ndnd/fw/core.LogDebug
time=2025-01-13T21:11:20.104Z level=DEBUG msg="[StrategyLoader] Instantiated Strategy=/localhost/nfd/strategy/best-route/v=1 for Thread=0" source=github.com/named-data/ndnd/fw/core.LogDebug
time=2025-01-13T21:11:20.104Z level=DEBUG msg="[StrategyLoader] Instantiated Strategy=/localhost/nfd/strategy/multicast/v=1 for Thread=0" source=github.com/named-data/ndnd/fw/core.LogDebug
time=2025-01-13T21:11:20.104Z level=INFO msg="Starting management thread" tag=Mgmt source=github.com/named-data/ndnd/fw/mgmt.(*Thread).Run
time=2025-01-13T21:11:20.104Z level=DEBUG msg="[StrategyLoader] Instantiated Strategy=/localhost/nfd/strategy/best-route/v=1 for Thread=1" source=github.com/named-data/ndnd/fw/core.LogDebug
time=2025-01-13T21:11:20.104Z level=DEBUG msg="[FaceTable] Registered FaceID=2" source=github.com/named-data/ndnd/fw/core.LogDebug
time=2025-01-13T21:11:20.104Z level=DEBUG msg="[StrategyLoader] Instantiated Strategy=/localhost/nfd/strategy/multicast/v=1 for Thread=1" source=github.com/named-data/ndnd/fw/core.LogDebug
time=2025-01-13T21:11:20.105Z level=INFO msg="Created unicast UDP listener" tag=YaNFD uri=udp://0.0.0.0:6363 source=github.com/named-data/ndnd/fw/executor.(*YaNFD).Start
time=2025-01-13T21:11:20.105Z level=INFO msg="Created unicast UDP listener" tag=YaNFD uri=udp://[::]:6363 source=github.com/named-data/ndnd/fw/executor.(*YaNFD).Start
time=2025-01-13T21:11:20.105Z level=INFO msg="Created Unix stream listener" tag=YaNFD uri=/run/nfd/nfd.sock source=github.com/named-data/ndnd/fw/executor.(*YaNFD).Start

[zjkmxy]

Oh this involves >100 files ...
Will review ASAP but I think I need some time.

[pulsejet]

Oh this involves >100 files ... Will review ASAP but I think I need some time.

Sorry about that, it does touch basically everything.

Any objections to the concept in general? I think the changes are largely safe.

My assumption - since NDN apps are decentralized, they don't produce the same volume / kind of logs as cloud apps. So a single "tag" field should be enough to easily filter out the logs you need. The focus, as with other PRs, is on usability.

[zjkmxy]

My assumption - since NDN apps are decentralized, they don't produce the same volume / kind of logs as cloud apps. So a single "tag" field should be enough to easily filter out the logs you need. The focus, as with other PRs, is on usability.

I agree, but we also need filter by names. So module and name (if applicable) are mandatory .

[pulsejet]

module is tag now (function is same as before)

For name, we can directly filter using any attribute as needed. (as long as key is the same, by convention).