flolu / mongodb-k8s-connection

Cannot connect to MongoDB ReplicaSet from within Kubernetes Cluster (ECONNREFUSED)

Setup on Ubuntu

1. clone this repo

2. yarn install

3. install MicroK8s

   sudo snap install microk8s --classic
   
   # make accessable without sudo
   sudo usermod -a -G microk8s $USER
   sudo chown -f -R $USER ~/.kube
   su - $USER
   
   # tell docker, that the local registry is ok to use
   sudo cp daemon.json /etc/docker/daemon.json
   sudo systemctl restart docker
   
   # point kubectl command to microk8s.kubectl
   sudo snap alias microk8s.kubectl kubectl

4. microk8s enable dns ingress registry

5. setup mongodb replica set on the kubernetes cluster

   git clone https://github.com/mongodb/mongodb-kubernetes-operator
   cd mongodb-kubernetes-operator
   
   microk8s.kubectl create namespace mongodb
   microk8s.kubectl create -f deploy/crds/mongodb.com_mongodb_crd.yaml
   microk8s.kubectl create -f deploy/ --namespace mongodb
   
   cd ..
   microk8s.kubectl apply -f mongodb.yaml -n mongodb

6. yarn deploy

Setup Generally

1. clone this repo

2. yarn install

3. Make sure kubectl is istalled and it points to a cluster with ingress and container registry enabled

4. Change cluster in the WORKSPACE file (line 65) to your cluster name and image_chroot (line 66) to your registry

5. setup mongodb replica set on the kubernetes cluster

   git clone https://github.com/mongodb/mongodb-kubernetes-operator
   cd mongodb-kubernetes-operator
   
   kubectl create namespace mongodb
   kubectl create -f deploy/crds/mongodb.com_mongodb_crd.yaml
   kubectl create -f deploy/ --namespace mongodb
   
   cd ..
   kubectl apply -f mongodb.yaml -n mongodb

6. yarn deploy

Issue

I've created this repository, because I wanted to showcase a connection issue. But after creating it from scratch it seems as if there is no issue 🤦

Related issue link: mongodb/mongodb-kubernetes-operator#108