I tried to run the steps for the example 
here: https://grpc.io/docs/quickstart/web.html

And eventually it fails.

wander@peniche:~/grpc-web$ sudo docker-compose pull
[sudo] password for wander:
Pulling common          ... done
Pulling node-server     ... done
Pulling envoy           ... done
Pulling commonjs-client ... done
wander@peniche:~/grpc-web$ sudo docker-compose up -d node-server envoy 
commonjs-client
Creating network "grpc-web_default" with the default driver
Creating grpc-web_common_1 ... done
Creating grpc-web_commonjs-client_1 ... done
Creating grpc-web_node-server_1     ... done
Creating grpc-web_envoy_1           ... error


ERROR: for grpc-web_envoy_1  Cannot start service envoy: driver failed 
programming external connectivity on endpoint grpc-web_envoy_1 (
951746f302c1eec69ecfbbc1970d8c8e7c2de8ee39d8f9f0c8f6b475a1415ce5): Error 
starting userland proxy: listen tcp 0.0.0.0:8080: bind: address already in 
use


ERROR: for envoy  Cannot start service envoy: driver failed programming 
external connectivity on endpoint grpc-web_envoy_1 (
951746f302c1eec69ecfbbc1970d8c8e7c2de8ee39d8f9f0c8f6b475a1415ce5): Error 
starting userland proxy: listen tcp 0.0.0.0:8080: bind: address already in 
use
ERROR: Encountered errors while bringing up the project.
wander@peniche:~/grpc-web$

I am using Ubuntu, Cosmic 18.10 and I installed Docker using these 
instructions:


https://docs.docker.com/install/linux/docker-ce/ubuntu/

When I quickly search for a process on my system binding to port 8080, I 
found these: 

wander@peniche:~$ ps -ef | grep kube
root       913     1  1 01:55 ?        00:10:31 /snap/microk8s/412/kubelet 
--kubeconfig=/snap/microk8s/412/configs/kubelet.config --cert-dir=/var/snap/
microk8s/412 --network-plugin=kubenet --root-dir=/var/snap/microk8s/common/
var/lib/kubelet --docker-root=/var/snap/microk8s/common/var/lib/docker --
fail-swap-on=false --pod-cidr=10.1.1.0/24 --non-masquerade-cidr=10.152.183.0
/24 --cni-bin-dir=/snap/microk8s/412/opt/cni/bin/ --docker 
unix:///var/snap/microk8s/412/docker.sock 
--docker-endpoint unix:///var/snap/microk8s/412/docker.sock 
--feature-gates=DevicePlugins=true 
--eviction-hard=memory.available<100Mi,nodefs.available<1Gi,imagefs.available<1Gi
 
--node-labels=microk8s.io/cluster=true
root       940     1  1 01:55 ?        00:10:24 
/snap/microk8s/412/kube-apiserver 
--insecure-bind-address=0.0.0.0 --cert-dir=/var/snap/microk8s/412 --etcd-
servers=unix://etcd.socket:2379 --service-cluster-ip-range=10.152.183.0/24 
--authorization-mode=AlwaysAllow 
--basic-auth-file=/snap/microk8s/412/basic_auth.csv 
--token-auth-file=/snap/microk8s/412/known_token.csv 
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota
 
--service-account-key-file=/var/snap/microk8s/412/certs/serviceaccount.key 
--client-ca-file=/var/snap/microk8s/412/certs/ca.crt 
--tls-cert-file=/var/snap/microk8s/412/certs/server.crt 
--tls-private-key-file=/var/snap/microk8s/412/certs/server.key 
--requestheader-client-ca-file=/var/snap/microk8s/412/certs/ca.crt
root       951     1  0 01:55 ?        00:04:01 
/snap/microk8s/412/kube-scheduler 
--master=http://127.0.0.1:8080
root      1101     1  0 01:55 ?        00:01:15 /snap/microk8s/412/kube-proxy 
--master=http://127.0.0.1:8080 --cluster-cidr=10.152.183.0/24 
--kubeconfig=/snap/microk8s/412/kubeproxy.config --proxy-mode=userspace
root      1116     1  1 01:55 ?        00:12:54 /snap/microk8s/412/kube-
controller-manager --master=http://127.0.0.1:8080 
--service-account-private-key-file=/var/snap/microk8s/412/certs/serviceaccount.key
 
--root-ca-file=/var/snap/microk8s/412/certs/ca.crt


I don't remember specifically installing Kubernetes, but perhaps it came 
with Docker?

In any regards, how do I fix this port conflict? I am new to grpc-web, 
docker.

Thanks

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