The k8s rabbithole - Dedicated Rancher host (#3)

I deployed my first cluster and... it didn't quite work, because etcd couldn't bind to its port. Drat.

Likely this is because I deployed Rancher to k8s-1, then attempted to deploy a cluster to k8s-1/2/3. So, let's try again, but with a new machine called k8s-deployer (10.1.1.100).

Install Docker...
wings@k8s-deployer:~$ curl https://releases.rancher.com/install-docker/20.10.sh | sh

Add our current user to the docker group
wings@k8s-deployer:~$ sudo usermod -aG docker $USER

Log out, log in, then...

wings@k8s-deployer:~$ docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES

Now, deploy Rancher again:

wings@k8s-deployer:~$ sudo docker run -d --restart=unless-stopped -p 80:80 -p 443:443 --privileged rancher/rancher
[sudo] password for wings:
Unable to find image 'rancher/rancher:latest' locally
latest: Pulling from rancher/rancher
af637d9f9908: Downloading  12.96MB/45.71MB
f9224574abce: Downloading  15.06MB/31.13MB
ebae3352c76e: Download complete
7b21d0842057: Downloading  486.6kB/47.78MB
88a4b8d1c9ea: Waiting
068e40008a4a: Waiting
af8d478ed359: Waiting
0570bed5c15a: Waiting
f7dfd304c929: Waiting
e0f5d341d113: Waiting
bd89a58c597d: Waiting
c03c718eef46: Waiting
5e1f456cdbf8: Waiting
e55dca76e75f: Waiting
c9a821480bc3: Waiting
c6e3491b680d: Waiting
9d7c10a11f0f: Waiting

After a short while:

wings@k8s-deployer:~$ sudo docker run -d --restart=unless-stopped -p 80:80 -p 443:443 --privileged rancher/rancher
[sudo] password for wings:
Unable to find image 'rancher/rancher:latest' locally
latest: Pulling from rancher/rancher
af637d9f9908: Pull complete
f9224574abce: Pull complete
ebae3352c76e: Pull complete
7b21d0842057: Pull complete
88a4b8d1c9ea: Pull complete
068e40008a4a: Pull complete
af8d478ed359: Pull complete
0570bed5c15a: Pull complete
f7dfd304c929: Pull complete
e0f5d341d113: Pull complete
bd89a58c597d: Pull complete
c03c718eef46: Pull complete
5e1f456cdbf8: Pull complete
e55dca76e75f: Pull complete
c9a821480bc3: Pull complete
c6e3491b680d: Pull complete
9d7c10a11f0f: Pull complete
Digest: sha256:51658639bf2b28f4796e7daa04b0434e29fcf69ce062bf649462be77ae76cd2c
Status: Downloaded newer image for rancher/rancher:latest
41fe967e7f4adea91d202882027bced882f1ec3ebdadd901e2ed3165257329f6

Perform the same incantations as in the previous posts to get an admin password set (hint: store it somewhere safe!)

And login...

Go to Cluster Management, and we'll create our first cluster.

Click Create:

Click Custom:

Name the cluster "sandbox", then scroll to the bottom and set the endpoint to k8s.windowpa.in.

Clean up the hosts and delete the previous failed deployment (plus delete Rancher from k8s-1, not shown here).

wings@k8s-2:~$ docker ps -a
CONTAINER ID   IMAGE                                           COMMAND                  CREATED              STATUS                          PORTS     NAMES
d11e30f45c8f   rancher/mirrored-coreos-etcd:v3.4.16-rancher1   "/usr/local/bin/etcd…"   40 seconds ago       Restarting (1) 13 seconds ago             etcd
4ff62afa35d8   rancher/rancher-agent:v2.6.2                    "run.sh --server htt…"   About a minute ago   Up About a minute                         strange_lichterman
c2e61a39a248   rancher/rancher-agent:v2.6.2                    "run.sh --server htt…"   About an hour ago    Up About an hour                          distracted_burnell
wings@k8s-2:~$ docker stop d11e30f45c8f 4ff62afa35d8 c2e61a39a248
d11e30f45c8f
4ff62afa35d8
c2e61a39a248
wings@k8s-2:~$ docker container prune
WARNING! This will remove all stopped containers.
Are you sure you want to continue? [y/N] y
Deleted Containers:
d11e30f45c8fd56623d33292d03ebd0cbaf9ff6a6bf66767752ec9217d5c7482
4ff62afa35d88de5ac489b5da9d9f2cea38965bc8e8e0efd7ba046bc01187fda
c2e61a39a2480dde401d6ebf05ce350ee95e179cbad1efa065ef3956118feab1

Total reclaimed space: 1.27kB
wings@k8s-2:~$ docker volume prune
WARNING! This will remove all local volumes not used by at least one container.
Are you sure you want to continue? [y/N] y
Total reclaimed space: 0B

Now that we're all cleaned up, let's create our cluster. In Rancher, go to Cluster Options for the new cluster and check the etcd and Control Plane roles. We'll install all roles on all nodes in this lab.

Run the command listed on each node, then notice the helpful green note at the bottom... "4 new nodes have registered".

Hit Done and wait a few minutes for the cluster to deploy. You can watch its progress by clicking Conditions.

That's it for today, as I had some etcd teething problems.