What would be the best way to handle logs on Google Container Engine? By looking at the running pods I can see that every node is automatically running a fluentdservice. Can we tap into that to get our logs into Developer Console?
The fluentd container running on each node automatically collects the stdout and stderr of your pods and sends them to the Google Cloud Logging API. The only wrinkle is that the logs won't actually be saved by the logging API unless you've enabled the API for your project, which you can do here.
Once you've done that, the logs should show up in their normal place in the Developer Console.
Related
I have deployed a owin hosted web applciation in AKS(windows nodepool). The container is in running state but I am not able to hit the application. There might be runtime exceptions or errors but I am not able to figure out the path where I can see such errors in AKS Windows node.
Please help me.
So, the ideal way here would be to use kubctl logs (which goes to Monitor, if you have that enabled). However, Windows containers don't pass on its logs to stdout by default. You have to use Log Monitor for that. Essentially, you have to enable Log Monitor on your container image to be able to get the logs out of the container just like you do with Linux containers. I blogged about it here: https://techcommunity.microsoft.com/t5/itops-talk-blog/troubleshooting-windows-containers-apps-on-azure-kubernetes/ba-p/3269767
The other thing you can try is to use kubectl exec to run a command inside the container and get its output.
I have a simple VM instance running on Google Compute Engine. I am running a docker container in attached mode so everytime I send a request I can see logs coming from the container in the ssh-in-browser terminal, like ...GET / HTTP1.1 200 OK etc.
What is the simplest way to enable showing those logs in the Google Logging? For now I can only see the logs from firewall (by default). But I cant find any way to see the logs coming directly from VM terminal that I can see when I connect to the VM.
I would want to see exact messages in google logging that I can see in the terminal for that VM.
We have application deployed in K8S pod and all logs are being monitored in ELK stack. Now we have one application which is using external *.jar which is writing logs in one file local to container path. How I can send this logs to kubernetes console so that it will come to elastic search monitoring.
Any help is much appreciated!.
Now we have one application which is using external *.jar which is writing logs in one file local to container path. How I can send this logs to kubernetes console so that it will come to elastic search monitoring.
There are three ways, in increasing order of complexity:
Cheat and symlink the path it tries to log to as /dev/stdout (or /proc/1/fd/0); sometimes it works and it's super cheap, but if the logging system tries to seek to the end of the file, or rotate it, or catches on that it's not actually a "file", then you'll have to try other tricks
If the app uses a "normal" logging framework, such as log4j, slf4j, logback, etc, you have a better-than-average chance of being able to influence the app's logging behavior via some well placed configuration files or in some cases environment variables
Actually, you know, ask your developers to configure their application according to the 12 Factor App principles and log to stdout (and stderr!) like a sane app
Without more specifics we can't offer more specific advice, but that's the gist of it
I have an app that is dynamically creating docker containers and I can't intercept the way it is created.
I want to see logs from all the machines that are up. no matter if it was via docker-compose or just docker command line. I need to see all the logs.
Is it possible?
right no I need to run docker ps, see all the created machines and run docker log container.
I can't really monitor what is going inside.
Thanks
An approach is to use a dedicated logging container that can gather log events from other containers, aggregate them, then store or forward the events to a third-party service, this approach eliminates the dependencies on a host.
Further, dedicated logging containers can automatically collect, monitor, and analyze log events, It can scale your log events automatically without configuration. It can retrieve logs through multiple streams of log events, stats, and Docker API data.
You can check this link also for some help.
Docker Logging Best Practices
Say I have a container that has everything I need to run my web application (such as https://github.com/grigio/docker-stringer for example). How would I go about inspecting the logs for the different services (web server, application server, database server)? With all of the tutorials so far I have only been able to view the logs for the specific command run when starting the container.
One method would be to configure your logs to write to stdout and to use docker logs to retrieve them.
Another option would be to use a bindmount and link to your host file system.