ingress: cert-manager, letsencrypt, and travisloyd.xyz -> www.travisloyd.xyz

It seemed for awhile that the popular web browsers would automatically redirect travisloyd.xyz to www.travisloyd.xyz if travisloyd.xyz didn’t work.  But, after awhile that no longer seemed to happen.  So, let’s do this right.

Here’s an ingress to perform the redirect from travisloyd.xyz to www.travisloyd.xyz:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  annotations:
    #nginx.ingress.kubernetes.io/proxy-body-size: 1000m
    nginx.ingress.kubernetes.io/server-snippet: |
      return 301 https://www.travisloyd.xyz$request_uri;
  name: ingress-redirect
spec:
  ingressClassName: nginx
  rules:
  - host: travisloyd.xyz
  tls:
  - hosts:
    - travisloyd.xyz
    secretName: travisloyd.xyz-tls

But what about an automatic certificate via letsencrypt? Do we need it? Yes, otherwise https://travisloyd.xyz displays an invalid certificate before performing the redirect. But, we can’t just add the annotations for cert-manager to this redirect because the call back from lets encrypt will not verify correctly with the redirect. Instead, we need an ingress specifically for handling the letsencrypt callback:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  annotations:
    cert-manager.io/issuer: cluster-letsencrypt-issuer
    cert-manager.io/issuer-kind: ClusterIssuer
    #nginx.ingress.kubernetes.io/proxy-body-size: 1000m
  name: ingress-redirect-letsencrypt
spec:
  ingressClassName: nginx
  rules:
  - host: travisloyd.xyz
    http:
      paths:
      - backend:
          service:
            name: exp-wordpress-xyz-travisloyd-www
            port:
              name: http
        path: /.well-known
        pathType: Prefix
  tls:
  - hosts:
    - travisloyd.xyz
    secretName: travisloyd.xyz-tls

Perfect, now when the certs expire they’ll be renewed automatically via letsencrypt.

(ulimit) Heads up for anyone following my videos to install kubernetes on redhat

Redhat has an infinite value for ulimit by default which kubernetes inherits via the container service being used, this can result in some pods maxing out cpu and memory (such as haproxy and rabbitmq). For containerd the following fix solved the issue:

# sed -i 's/LimitNOFILE=infinity/LimitNOFILE=65535/' /usr/lib/systemd/system/containerd.service
# systemctl daemon-reload
# systemctl restart containerd
# k delete deployment <asdf>

homelab: planning next incarnation

Thinking about redeploying my homelab from scratch, perhaps switching from xenserver back to vmware. I’d like to start out with external-secrets and have all secrets in a vault right from the beginning, also curious what a 100% open source, 100% kubernetes environment would look like. Maybe two networks, one 100% kubernetes, and a 2nd for windows client systems. Here’s the k8s plan so far:

k-seed:
- manual setup of seed cluster
  - helm install argocd
  - argocd install clusterapi/crossplane/etc...
- seed-argocd deploy non-production cluster using vcluster or clusterapi/crossplane/etc...
  - deploy metallb & configure loadbalancer ip range (can we automate this w/ cluster deploy?)
  - add cluster to seed-argocd instance
- seed-argocd deploy production cluster using vcluster or clusterapi/crossplane/etc...
  - deploy metallb & configure loadbalancer ip range (can we automate this w/ cluster deploy?)
  - add cluster to seed-argocd instance
- seed-argocd deploy argocd to production cluster (k-prod)

k-prod:
- argocd configure storageclass
- argocd deploy hashicorp vault
  - configure as certificate authority
  - configure as keyvault
- argocd deploy external-secrets
  - configure to use keyvault
  - add secret 'ca-bundle.crt': public certificate authority certificate in DER format
  - *from now on all secrets to get values via external-secrets
- argocd deploy cert-manager
  - configure to use hashicorp vault as certificate authority
- argocd deploy pihole
  - configure dns1 & dns2
- argocd deploy external-dns
  - configure to use pihole as dns
- update with annotations to use external-dns & cert-manager:
  - argocd
  - vault
  - pihole
  - *from now on all ingress yaml to include annotations for external-dns & cert-manager
    - recommended: have annotations from the beginning, at this point they will start working
- argocd deploy keycloak
  - configure realm: create or import from backup
  - add secret 'default_oidc_client_secret': secret part of oidc client/secret
  - configure a user account (or configure federation via AD, openldap, etc...)
- deploy all other apps
  - oidc client_secret should come from external-secrets in all apps configured with oidc
    - this might require an init container for some apps

k-ceph:
- pvc storage for all clusters
- block storage can be used for vm disks (making for easy hotswap)
- upgrade to 2 10gb ports on each host system

wdc: (kubevirt in theory but think i'll stick w/ a vm)
- domain controller
- user management
- dhcp
- wds
- wsus using dev sqlserver & data stored on e drive

How did I ever live without … Palo Alto Firewall

Every now and then you come across a technology that you didn’t know about before, and you just can’t believe you haven’t been using the technology all this time.

Of course, at least you did find it … eventually.  Thank goodness.

I find myself just shaking my head in almost disbelief at all the things this thing can do.

It’s interesting to see what countries your apps are connecting to, who is accessing your website, logs of access, etc… so much data to geek out about.