Docker network status update#

The sendfile is usually essential to speed up any web server via passing the pointers (without copying the whole object) straight to the socket descriptor. The worker_connections sets the maximum number of simultaneous connections that can be opened by a worker process (default=1024). For more about it, check Thread Pools in NGINX Boost Performance 9x!. It is common practice to run 1 worker process per core. We set worker_processes explicitly to 1 which is the default value. Proxy_set_header X-Forwarded-Host $server_name Proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for Note that we copied the following nf to our reverse proxy container: Reverseproxy latest 788046b5f293 3 minutes ago 25.1MB Sending build context to Docker daemon 64.51kB Once it's done, we may want to remove the line we've just added since it will increase the size of the image. $ docker run -t -i nginx-alpine /bin/bash To check the version, we can add the following to the Dockerfile because the alpine docker image doesn't have bash installed by default: It will use the nf after copying it to the proxy container: Here is the Dockerfile which will be used to create the reverse proxy image. See Configure service discovery for more information about different endpoint modes.Д«ased on Flavio 'fcrisciani' Crisciani's comment on the issue Swarm Mode at Scale #30820, I'll try to add the option -endpoint-mode=dnsrr on my services.Dockerfile - building a reverse proxy image You can either use dnsrr endpoint mode with an external load balancer, or use multiple smaller overlay networks. If you need more than 256 IP addresses, do not increase the IP block size. This recommendation addresses limitations with swarm mode. You should create overlay networks with /24 blocks (the default), which limits you to 256 IP addresses, when you create networks using the default VIP-based endpoint-mode. I read again the Docker documentation about networks and they are mentionning an opened issue on Moby's Github Project Swarm Mode at Scale #30820.

Docker network status update#

N.B.: I don't want to update Docker in this moment. 'Created': '', <- this is the real date, strange isn't it? Is there any way to 'flush' the IP reservations in order to re-initialize the networks without recreation Docker networks?ДЄfter investigation, there are two types of services that can reach this New state and they're on 2 same networks. Today, in my opinion, I suspect that the networks I created in the Swarm ( -driver=overlay) have an insufficient IP range and can't give enough IP to containers. You'll be welcome if you can point me some links. I followed up some documentation on the web and there is nothing clear about this issue. It seems that I reached a limit by any way. If I stop some of my services, the service tagged with New state may start by itself after the first retry. Inspecting the service won't help either (nothing relevant). If I try to inspect the logs, they're empty. You can see CURRENT STATE = New 22 hours ago. When I list the service, I have this: ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTSДЄlam7whfn1xe service_name.1 some_image Running New 22 hours ago I have many running services right now and when I approach around 100 services (and with replications more than 110 services), the new services I want to run won't start. I'm facing a strange issue with my Docker Swarm (a cluster of 3 managers and 5 workers).