Add kubectx and kubens support to Dockerfile and bash completion scripts

Reviewed-on: #13

.github/workflows/build-workflow.yaml

@@ -5,9 +5,6 @@ on:
     - cron: '0 3 * * 6'
   push:
     branches: ["main"]
-    paths:
-      - "Dockerfile"
-      - ".github/workflows/build-workflow.yaml"
     tags: ["v*.*.*"]
   pull_request:
     branches: ["main"]

Dockerfile

@@ -1,8 +1,9 @@
-ARG NODE_IMAGE=node:22-bookworm-slim
+ARG NODE_IMAGE=node:22-trixie-slim
 FROM ${NODE_IMAGE} AS webssh2-builder
 
 ENV DEBIAN_FRONTEND=noninteractive
 
+# renovate: datasource=github-releases depName=billchurch/webssh2
 ARG WEBSSH2_VERSION=5.0.1
 
 RUN apt-get update \
@@ -19,19 +20,31 @@ RUN apt-get update \
     && rm -f "/tmp/webssh2-${WEBSSH2_VERSION}.tar.gz" "/tmp/webssh2-${WEBSSH2_VERSION}.tar.gz.sha256" \
     && npm cache clean --force
 
-FROM debian:bookworm-slim
+FROM debian:trixie-slim
+
+# renovate: datasource=github-releases depName=janosmiko/lfk
+ARG LFK_VERSION=0.14.18
+# renovate: datasource=github-releases depName=kubernetes/kubernetes
+ARG KUBECTL_VERSION=1.36.2
+# renovate: datasource=github-releases depName=helm/helm
+ARG HELM_VERSION=3.21.2
+# renovate: datasource=github-releases depName=derailed/k9s
+ARG K9S_VERSION=0.51.0
+# renovate: datasource=github-releases depName=int128/kubelogin
+ARG OIDC_LOGIN_VERSION=1.36.2
+# renovate: datasource=github-tags depName=ahmetb/kubectx
+ARG KUBECTX_VERSION=0.9.5
 
-ARG LFK_VERSION=0.14.9
-ARG KUBECTL_VERSION=1.31.0
-ARG HELM_VERSION=3.16.2
-ARG K9S_VERSION=0.40.10
-ARG WEBSSH2_VERSION=5.0.1
 
 ENV DEBIAN_FRONTEND=noninteractive \
+    LANG=en_US.UTF-8 \
+    LANGUAGE=en_US:en \
+    LC_ALL=en_US.UTF-8 \
     WEB_SSH_PORT=3000 \
     WEBSSH2_LISTEN_PORT=3001 \
     WEBSSH2_SSH_HOST=127.0.0.1 \
-    WEBSSH2_SSH_PORT=22 \
+    WEBSSH2_SSH_PORT=2222 \
+    SSH_PORT=2222 \
     WEBSSH2_HEADER_TEXT=k8s-mgmt-pod \
     WEBSSH2_SSH_HOSTKEY_ENABLED=false
 
@@ -43,7 +56,12 @@ RUN apt-get update \
         bash-completion \
         ca-certificates \
         curl \
+        jq \
+        locales \
+        unzip \
         tar \
+        vim \
+        yq \
         nginx-light \
         netcat-openbsd \
         openssh-client \
@@ -75,10 +93,23 @@ RUN apt-get update \
     && curl -fsSLo "/tmp/k9s_Linux_amd64.tar.gz" "https://github.com/derailed/k9s/releases/download/v${K9S_VERSION}/k9s_Linux_amd64.tar.gz" \
     && tar -xzf "/tmp/k9s_Linux_amd64.tar.gz" -C /tmp \
     && install -m 0755 /tmp/k9s /usr/local/bin/k9s \
+    && curl -fsSLo "/tmp/kubelogin_linux_amd64.zip" "https://github.com/int128/kubelogin/releases/download/v${OIDC_LOGIN_VERSION}/kubelogin_linux_amd64.zip" \
+    && curl -fsSLo "/tmp/kubelogin_linux_amd64.zip.sha256" "https://github.com/int128/kubelogin/releases/download/v${OIDC_LOGIN_VERSION}/kubelogin_linux_amd64.zip.sha256" \
+    && sed 's#\*kubelogin_linux_amd64.zip$#*/tmp/kubelogin_linux_amd64.zip#' /tmp/kubelogin_linux_amd64.zip.sha256 | sha256sum -c - \
+    && unzip -p /tmp/kubelogin_linux_amd64.zip kubelogin > /usr/local/bin/kubectl-oidc_login \
+    && chmod 0755 /usr/local/bin/kubectl-oidc_login \
+    && curl -fsSLo /usr/local/bin/kubectx "https://raw.githubusercontent.com/ahmetb/kubectx/v${KUBECTX_VERSION}/kubectx" \
+    && curl -fsSLo /usr/local/bin/kubens "https://raw.githubusercontent.com/ahmetb/kubectx/v${KUBECTX_VERSION}/kubens" \
+    && chmod 0755 /usr/local/bin/kubectx /usr/local/bin/kubens \
     && mkdir -p /etc/bash_completion.d \
+    && curl -fsSLo /etc/bash_completion.d/kubectx "https://raw.githubusercontent.com/ahmetb/kubectx/v${KUBECTX_VERSION}/completion/kubectx.bash" \
+    && curl -fsSLo /etc/bash_completion.d/kubens "https://raw.githubusercontent.com/ahmetb/kubectx/v${KUBECTX_VERSION}/completion/kubens.bash" \
     && kubectl completion bash > /etc/bash_completion.d/kubectl \
     && helm completion bash > /etc/bash_completion.d/helm \
-    && chmod 0644 /etc/bash_completion.d/kubectl /etc/bash_completion.d/helm \
+    && chmod 0644 /etc/bash_completion.d/kubectl /etc/bash_completion.d/helm /etc/bash_completion.d/kubectx /etc/bash_completion.d/kubens \
+    && sed -i 's/^# *en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/' /etc/locale.gen \
+    && locale-gen en_US.UTF-8 \
+    && update-locale LANG=en_US.UTF-8 LC_ALL=en_US.UTF-8 \
     && rm -f /tmp/kubectl.sha256 \
     && rm -rf /tmp/linux-amd64 \
     && rm -f \
@@ -87,8 +118,12 @@ RUN apt-get update \
         /tmp/k9s \
         /tmp/README.md \
         /tmp/LICENSE \
+        /tmp/kubelogin_linux_amd64.zip \
+        /tmp/kubelogin_linux_amd64.zip.sha256 \
         /tmp/k9s_Linux_amd64.tar.gz \
-    && rm -f /etc/ssh/ssh_host_*
+    && rm -f /etc/ssh/ssh_host_* \
+    && apt-get clean
+
 
 COPY docker/sshd/10-lfk-base.conf /etc/ssh/sshd_config.d/10-lfk-base.conf
 COPY docker/nginx/webssh.conf /etc/nginx/conf.d/webssh.conf
@@ -99,9 +134,9 @@ COPY entrypoint.sh /usr/local/bin/entrypoint.sh
 RUN chmod 0755 /usr/local/bin/entrypoint.sh \
     && chmod 0644 /etc/profile.d/20-k8s-tools-completion.sh
 
-EXPOSE 22 3000
+EXPOSE 2222 3000
 
 HEALTHCHECK --interval=30s --timeout=5s --start-period=15s --retries=3 \
-  CMD nc -z 127.0.0.1 22 || exit 1
+    CMD nc -z 127.0.0.1 "${SSH_PORT:-2222}" || exit 1
 
 ENTRYPOINT ["/usr/bin/tini", "--", "/usr/local/bin/entrypoint.sh"]

README.md

@@ -6,8 +6,10 @@
 - `kubectl` preinstalled from a pinned upstream binary release
 - `helm` preinstalled from a pinned upstream binary release
 - `k9s` preinstalled from a pinned GitHub release tarball
-- `kubectl` and `helm` bash autocompletion enabled for both `admin` and `user`
+- `kubectx` and `kubens` preinstalled from a pinned upstream release
-- local `openssh-server` on port `22`
+- `jq`, `yq`, and `vim` preinstalled from Debian packages
+- `kubectl`, `helm`, `kubectx`, and `kubens` bash autocompletion enabled for both `admin` and `user`
+- local `openssh-server` on port `2222`
 - a browser-based SSH client on port `3000`
 - a custom ASCII-art MOTD on login
 - two provisioned users: `admin` and `user`
@@ -20,7 +22,7 @@ One caveat is worth stating clearly: browser-based SSH tools do not keep the pri
 
 ## Ports
 
-- `22`: native SSH into the container's local `sshd`
+- `2222`: native SSH into the container's local `sshd`
 - `3000`: browser UI entrypoint; `/` and `/ssh` are forced to a fixed local WebSSH2 session for `127.0.0.1` and rewritten back to that host if changed in the URL
 
 ## Runtime environment variables
@@ -71,6 +73,8 @@ The included [docker-compose.yaml](docker-compose.yaml) enables kubeconfig boots
 
 That bootstrap is explicitly opt-in and defaults to off in the container itself, so it does not run in Kubernetes unless you deliberately enable it.
 
+When both are available, the bootstrap kubeconfig is applied after the service-account kubeconfig and therefore takes precedence.
+
 Start it with:
 
 ```bash
@@ -113,7 +117,7 @@ If `${HOME}/.kube/config` is missing on the host, the container logs that bootst
 
 ```bash
 docker run --rm \
-  -p 2222:22 \
+  -p 2222:2222 \
   -p 3000:3000 \
   -e ADMIN_SSH_PUBKEY="$(cat ~/.ssh/id_ed25519.pub)" \
   -e USER_SSH_PUBKEY="ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIexample user@example" \
@@ -132,7 +136,7 @@ Or in a browser at `http://localhost:3000/`.
 
 ```bash
 docker run --rm \
-  -p 2222:22 \
+  -p 2222:2222 \
   -p 3000:3000 \
   -e ADMIN_PASSWORD='change-this-admin-password' \
   -e USER_PASSWORD='change-this-user-password' \
@@ -143,7 +147,7 @@ If that fails with a message like `unable to upgrade to tcp, received 500`, the
 
 ```bash
 docker run -d --name k8s-mgmt-pod \
-  -p 2222:22 \
+  -p 2222:2222 \
   -p 3000:3000 \
   -e ADMIN_PASSWORD='change-this-admin-password' \
   -e USER_PASSWORD='change-this-user-password' \
@@ -156,7 +160,7 @@ If Docker reports `bind: address already in use`, change the host-side ports or
 
 ```bash
 docker run --rm \
-  -p 127.0.0.1::22 \
+  -p 127.0.0.1::2222 \
   -p 127.0.0.1::3000 \
   -e ADMIN_PASSWORD='change-this-admin-password' \
   -e USER_PASSWORD='change-this-user-password' \
@@ -167,7 +171,7 @@ docker run --rm \
 
 ```bash
 docker run --rm \
-  -p 2222:22 \
+  -p 2222:2222 \
   -p 3000:3000 \
   -e ADMIN_SSH_PUBKEY="$(cat ~/.ssh/id_ed25519.pub)" \
   -e ADMIN_PASSWORD='change-this-admin-password' \
@@ -184,7 +188,7 @@ If you omit both the public-key and password variables for a user, the container
 
 ```bash
 docker run --rm \
-  -p 2222:22 \
+  -p 2222:2222 \
   -p 3000:3000 \
   -e ADMIN_SSH_PUBKEY="$(cat ~/.ssh/id_ed25519.pub)" \
   k8s-mgmt-pod:local

docker-compose.yaml

@@ -6,7 +6,7 @@ services:
       dockerfile: Dockerfile
     container_name: k8s-mgmt-pod
     ports:
-      - "${HOST_SSH_PORT:-2222}:22"
+      - "${HOST_SSH_PORT:-2222}:2222"
       - "${HOST_WEBSSH_PORT:-3000}:3000"
     environment:
       ADMIN_PASSWORD: ${ADMIN_PASSWORD:-change-this-admin-password}

docker/motd

@@ -1,13 +1,13 @@
 
   ╔════════════════════════════════════════════════════════════════╗
   ║                                                                ║
-  ║   ██╗     ███████╗██╗  ██╗   ██╗  ██╗ █████╗ ███████╗         ║
+  ║                                                                ║
-  ║   ██║     ██╔════╝██║ ██╔╝   ██║ ██╔╝██╔══██╗██╔════╝         ║
+  ║   _  __  ___   ____      __  __   ____  __  __  _____          ║
-  ║   ██║     █████╗  █████╔╝    █████╔╝ ╚█████╔╝███████╗         ║
+  ║  | |/ / / _ \ / ___|    |  \/  | / ___||  \/  ||_   _|         ║
-  ║   ██║     ██╔══╝  ██╔═██╗    ██╔═██╗ ██╔══██╗╚════██║         ║
+  ║  | ' / | (_) |\___ \    | |\/| || |  _ | |\/| |  | |           ║
-  ║   ███████╗██║     ██║  ██╗   ██║  ██╗╚█████╔╝███████║         ║
+  ║  | . \  \__, | ___) |   | |  | || |_| || |  | |  | |           ║
-  ║   ╚══════╝╚═╝     ╚═╝  ╚═╝   ╚═╝  ╚═╝ ╚════╝ ╚══════╝         ║
+  ║  |_|\_\   /_/ |____/    |_|  |_| \____||_|  |_|  |_|           ║
-  ║              Kubernetes Management Pod - Jump Box             ║
+  ║              Kubernetes Management Pod - Jump Box              ║
   ║                                                                ║
   ╠════════════════════════════════════════════════════════════════╣
   ║  Toolbelt                                                      ║
@@ -15,7 +15,7 @@
   ║    - lfk     : LFK kubernetes management                       ║
   ║    - k9s     : interactive cluster navigation                  ║
   ║    - helm    : chart install, upgrade, and rollback            ║
-  ║    - plus    : kubectx, kubens, jq, yq, and more               ║
+  ║    - plus    : kubectx, kubens, jq, yq, vim, and more          ║
   ║                                                                ║
   ╠════════════════════════════════════════════════════════════════╣
   ║  Quick start                                                   ║

docker/profile/20-k8s-tools-completion.sh

@@ -13,6 +13,14 @@ if [ -n "${BASH_VERSION:-}" ]; then
   if [ -r /etc/bash_completion.d/helm ]; then
     . /etc/bash_completion.d/helm
   fi
+
+  if [ -r /etc/bash_completion.d/kubectx ]; then
+    . /etc/bash_completion.d/kubectx
+  fi
+
+  if [ -r /etc/bash_completion.d/kubens ]; then
+    . /etc/bash_completion.d/kubens
+  fi
 fi
 
 alias k=kubectl

docker/sshd/10-lfk-base.conf

@@ -1,4 +1,3 @@
-Port 22
 Protocol 2
 PermitRootLogin no
 PubkeyAuthentication yes

entrypoint.sh

@@ -4,12 +4,20 @@ set -Eeuo pipefail
 STATE_DIR="/var/lib/k8s-mgmt-pod"
 GENERATED_PASSWORDS_FILE="${STATE_DIR}/generated-passwords.env"
 SSH_DYNAMIC_CONFIG="/etc/ssh/sshd_config.d/20-k8s-mgmt-pod-auth.conf"
+K8S_RUNTIME_ENV_PROFILE="/etc/profile.d/30-kubernetes-runtime-env.sh"
 PASSWORD_AUTH_REQUIRED=0
 SSHD_PID=""
 WEBSSH2_PID=""
 NGINX_PID=""
 BOOTSTRAP_KUBECONFIG="${BOOTSTRAP_KUBECONFIG:-/bootstrap/kubeconfig/config}"
 ENABLE_BOOTSTRAP_KUBECONFIG="${ENABLE_BOOTSTRAP_KUBECONFIG:-false}"
+KUBERNETES_SECRETS_DIR="${KUBERNETES_SECRETS_DIR:-/var/run/kubernetes.io}"
+SSH_PORT="${SSH_PORT:-2222}"
+
+if [[ -z "${WEBSSH2_SSH_PORT:-}" ]]; then
+  WEBSSH2_SSH_PORT="${SSH_PORT}"
+fi
+export WEBSSH2_SSH_PORT
 
 ensure_host_keys() {
   if [[ ! -f "${STATE_DIR}/ssh_host_rsa_key" ]]; then
@@ -70,7 +78,8 @@ store_generated_password() {
 read_generated_password() {
   local username="$1"
 
-  grep -E "^${username}=" "${GENERATED_PASSWORDS_FILE}" | tail -n 1 | cut -d '=' -f 2-
+  # Return an empty string if no entry exists; never fail under `set -euo pipefail`.
+  awk -F '=' -v username="${username}" '$1 == username { value = substr($0, index($0, "=") + 1) } END { if (value != "") print value }' "${GENERATED_PASSWORDS_FILE}"
 }
 
 write_authorized_keys() {
@@ -89,12 +98,87 @@ write_authorized_keys() {
 
 install_kubeconfig_for_user() {
   local username="$1"
+  local source_kubeconfig="$2"
   local home_dir="/home/${username}"
   local kube_dir="${home_dir}/.kube"
   local kube_config="${kube_dir}/config"
 
   mkdir -p "${kube_dir}"
-  install -m 0600 -o "${username}" -g "${username}" "${BOOTSTRAP_KUBECONFIG}" "${kube_config}"
+  mkdir -p "${kube_dir}/cache"
+  chown -R "${username}:${username}" "${kube_dir}"
+  chmod 0700 "${kube_dir}"
+  install -m 0600 -o "${username}" -g "${username}" "${source_kubeconfig}" "${kube_config}"
+}
+
+resolve_kubernetes_secrets_dir() {
+  local configured_dir="${KUBERNETES_SECRETS_DIR}"
+  local fallback_dir="/var/run/secrets/kubernetes.io/serviceaccount"
+
+  if [[ -f "${configured_dir}/token" && -f "${configured_dir}/ca.crt" && -f "${configured_dir}/namespace" ]]; then
+    printf '%s\n' "${configured_dir}"
+    return 0
+  fi
+
+  if [[ "${configured_dir}" != "${fallback_dir}" ]] \
+    && [[ -f "${fallback_dir}/token" && -f "${fallback_dir}/ca.crt" && -f "${fallback_dir}/namespace" ]]; then
+    printf '%s\n' "${fallback_dir}"
+    return 0
+  fi
+
+  return 1
+}
+
+install_serviceaccount_kubeconfig() {
+  local sa_dir=""
+  local token_file=""
+  local ca_file=""
+  local namespace_file=""
+  local namespace=""
+  local kubernetes_host="${KUBERNETES_SERVICE_HOST:-kubernetes.default.svc}"
+  local kubernetes_port="${KUBERNETES_SERVICE_PORT_HTTPS:-443}"
+  local server=""
+  local generated_kubeconfig="${STATE_DIR}/incluster.kubeconfig"
+
+  if ! sa_dir="$(resolve_kubernetes_secrets_dir)"; then
+    log "Skipping in-cluster kubeconfig generation because no service-account mount was found in ${KUBERNETES_SECRETS_DIR} or /var/run/secrets/kubernetes.io/serviceaccount."
+    return
+  fi
+
+  token_file="${sa_dir}/token"
+  ca_file="${sa_dir}/ca.crt"
+  namespace_file="${sa_dir}/namespace"
+  namespace="$(tr -d '\n' < "${namespace_file}")"
+  if [[ -z "${namespace}" ]]; then
+    namespace="default"
+  fi
+
+  server="https://${kubernetes_host}:${kubernetes_port}"
+
+  cat > "${generated_kubeconfig}" <<EOF
+apiVersion: v1
+kind: Config
+clusters:
+- name: in-cluster
+  cluster:
+    certificate-authority: ${ca_file}
+    server: ${server}
+contexts:
+- name: in-cluster
+  context:
+    cluster: in-cluster
+    user: service-account
+    namespace: ${namespace}
+current-context: in-cluster
+users:
+- name: service-account
+  user:
+    tokenFile: ${token_file}
+EOF
+
+  chmod 0600 "${generated_kubeconfig}"
+  install_kubeconfig_for_user admin "${generated_kubeconfig}"
+  install_kubeconfig_for_user user "${generated_kubeconfig}"
+  log "Installed generated in-cluster kubeconfig for admin and user from ${sa_dir}."
 }
 
 install_bootstrap_kubeconfig() {
@@ -107,8 +191,8 @@ install_bootstrap_kubeconfig() {
     return
   fi
 
-  install_kubeconfig_for_user admin
+  install_kubeconfig_for_user admin "${BOOTSTRAP_KUBECONFIG}"
-  install_kubeconfig_for_user user
+  install_kubeconfig_for_user user "${BOOTSTRAP_KUBECONFIG}"
   log "Installed mounted kubeconfig for admin and user."
 }
 
@@ -186,15 +270,38 @@ render_sshd_auth_config() {
   fi
 
   cat > "${SSH_DYNAMIC_CONFIG}" <<EOF
+Port ${SSH_PORT}
 PasswordAuthentication ${password_value}
 KbdInteractiveAuthentication ${keyboard_interactive_value}
 EOF
 }
 
+persist_kubernetes_login_env() {
+  local kubernetes_host="${KUBERNETES_SERVICE_HOST:-kubernetes.default.svc}"
+  local kubernetes_https_port="${KUBERNETES_SERVICE_PORT_HTTPS:-443}"
+  local kubernetes_port="${KUBERNETES_SERVICE_PORT:-${kubernetes_https_port}}"
+
+  cat > "${K8S_RUNTIME_ENV_PROFILE}" <<EOF
+# Generated at container start so SSH login shells see Kubernetes API environment values.
+export KUBERNETES_SERVICE_HOST='${kubernetes_host}'
+export KUBERNETES_SERVICE_PORT='${kubernetes_port}'
+export KUBERNETES_SERVICE_PORT_HTTPS='${kubernetes_https_port}'
+EOF
+
+  chmod 0644 "${K8S_RUNTIME_ENV_PROFILE}"
+}
+
 prepare_runtime() {
   mkdir -p /var/run/sshd
   ensure_host_keys
-  install_bootstrap_kubeconfig
+  if [[ "${ENABLE_BOOTSTRAP_KUBECONFIG}" == "true" ]]; then
+    log "Kubeconfig mode: bootstrap-only (serviceaccount kubeconfig generation disabled)."
+    install_bootstrap_kubeconfig
+  else
+    log "Kubeconfig mode: in-cluster serviceaccount."
+    install_serviceaccount_kubeconfig
+  fi
+  persist_kubernetes_login_env
   configure_user_auth admin ADMIN_SSH_PUBKEY ADMIN_PASSWORD
   configure_user_auth user USER_SSH_PUBKEY USER_PASSWORD
   render_sshd_auth_config
@@ -211,7 +318,7 @@ start_services() {
   nginx -g 'daemon off;' &
   NGINX_PID=$!
 
-  log "sshd started on port 22."
+  log "sshd started on port ${SSH_PORT}."
   log "WebSSH2 started on port ${WEBSSH2_LISTEN_PORT}."
   log "nginx redirect/proxy started on port ${WEB_SSH_PORT}."
 

k8s/README.md

@@ -7,6 +7,7 @@ These manifests deploy `k8s-mgmt-pod` as a single-replica bastion deployment ins
 1. Build and publish the image.
 2. Replace the placeholder image in `deployment.yaml` with a pinned tag or digest.
 3. Create the real `k8s-mgmt-pod-auth` Secret instead of applying `secret.yaml.example`.
+4. The pod state directory is now backed by a PVC, so SSH host keys and generated fallback passwords survive pod recreation until you delete the claim.
 
 ## Create the Secret
 
@@ -62,7 +63,7 @@ If you prefer individual files, apply `namespace.yaml`, `serviceaccount.yaml`, `
 Port-forward the service instead of exposing it externally by default:
 
 ```bash
-kubectl -n k8s-mgmt-pod port-forward svc/k8s-mgmt-pod 2222:22 3000:3000
+kubectl -n k8s-mgmt-pod port-forward svc/k8s-mgmt-pod 2222:2222 3000:3000
 ```
 
 Then connect with:

k8s/deployment.yaml

@@ -16,20 +16,24 @@ spec:
     spec:
       serviceAccountName: k8s-mgmt-pod
       automountServiceAccountToken: true
+
       securityContext:
         seccompProfile:
           type: RuntimeDefault
+        fsGroup: 1000
+        fsGroupChangePolicy: OnRootMismatch
+
       containers:
         - name: k8s-mgmt-pod
-          image: git.alcatrash.net/michael/k8s-mgmt-pod/k8s-mgmt-pod:v1.0.0
+          image: git.alcatrash.net/michael/k8s-mgmt-pod/k8s-mgmt-pod:latest
-          imagePullPolicy: IfNotPresent
+          imagePullPolicy: Always
+
           ports:
             - name: ssh
-              containerPort: 22
+              containerPort: 2222
-              protocol: TCP
             - name: webssh
               containerPort: 3000
-              protocol: TCP
+
           env:
             - name: ADMIN_SSH_PUBKEY
               valueFrom:
@@ -55,6 +59,7 @@ spec:
                   name: k8s-mgmt-pod-auth
                   key: USER_PASSWORD
                   optional: true
+
           resources:
             requests:
               cpu: 100m
@@ -62,30 +67,42 @@ spec:
             limits:
               cpu: 500m
               memory: 512Mi
+
           readinessProbe:
             tcpSocket:
-              port: 22
+              port: 2222
             initialDelaySeconds: 5
             periodSeconds: 10
+
           livenessProbe:
             tcpSocket:
-              port: 22
+              port: 2222
             initialDelaySeconds: 15
             periodSeconds: 20
+
           volumeMounts:
             - name: state
               mountPath: /var/lib/k8s-mgmt-pod
+
           securityContext:
-            # sshd still runs as root here because it needs to bind port 22 and switch to the authenticated user session.
-            # The tradeoff is deliberate: keep the container functional, then narrow capabilities instead of forcing a fragile rootless sshd setup.
             runAsUser: 0
             runAsGroup: 0
             runAsNonRoot: false
             allowPrivilegeEscalation: false
             readOnlyRootFilesystem: false
             capabilities:
-              drop: ["ALL"]
+              drop:
-              add: ["CHOWN", "DAC_OVERRIDE", "FOWNER", "NET_BIND_SERVICE", "SETGID", "SETUID"]
+                - ALL
+              add:
+                - AUDIT_WRITE
+                - CHOWN
+                - DAC_OVERRIDE
+                - FOWNER
+                - SETGID
+                - SETUID
+                - SYS_CHROOT
+
       volumes:
         - name: state
-          emptyDir: {}
+          persistentVolumeClaim:
+            claimName: k8s-mgmt-pod-state

k8s/kustomization.yaml

@@ -5,6 +5,7 @@ resources:
   - namespace.yaml
   - serviceaccount.yaml
   - rbac.yaml
+  - pvc.yaml
   - deployment.yaml
   - service.yaml
   - networkpolicy.yaml

k8s/networkpolicy.yaml

@@ -19,6 +19,6 @@ spec:
               k8s-mgmt-pod-access: "true"
       ports:
         - protocol: TCP
-          port: 22
+          port: 2222
         - protocol: TCP
           port: 3000

k8s/pvc.yaml

@@ -0,0 +1,10 @@
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: k8s-mgmt-pod-state
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 1Gi

k8s/rbac.yaml

@@ -1,49 +1,189 @@
 apiVersion: rbac.authorization.k8s.io/v1
-kind: Role
+kind: ClusterRole
 metadata:
   name: k8s-mgmt-pod
 rules:
-  # This is intentionally broader than the strict minimum so lfk and kubectl are usable.
-  # Scope it down to the smallest verb and resource set your operators actually need.
   - apiGroups: [""]
     resources:
       - configmaps
       - endpoints
       - events
+      - limitranges
+      - namespaces
+      - nodes
       - persistentvolumeclaims
+      - persistentvolumes
       - pods
-      - pods/exec
       - pods/log
-      - secrets
+      - pods/portforward
+      - pods/proxy
+      - replicationcontrollers
+      - replicationcontrollers/scale
+      - resourcequotas
       - serviceaccounts
       - services
-    verbs: ["get", "list", "watch", "create", "update", "patch", "delete"]
+      - services/proxy
+    verbs: ["*"]
   - apiGroups: ["apps"]
     resources:
+      - controllerrevisions
       - daemonsets
       - deployments
+      - deployments/scale
       - replicasets
+      - replicasets/scale
       - statefulsets
-    verbs: ["get", "list", "watch", "create", "update", "patch", "delete"]
+      - statefulsets/scale
+    verbs: ["*"]
   - apiGroups: ["batch"]
     resources:
       - cronjobs
       - jobs
-    verbs: ["get", "list", "watch", "create", "update", "patch", "delete"]
+    verbs: ["*"]
+  - apiGroups: ["autoscaling"]
+    resources:
+      - horizontalpodautoscalers
+    verbs: ["*"]
   - apiGroups: ["networking.k8s.io"]
     resources:
+      - ingressclasses
       - ingresses
-      - networkpolicies
+    verbs: ["*"]
-    verbs: ["get", "list", "watch", "create", "update", "patch", "delete"]
+  - apiGroups: ["extensions"]
+    resources:
+      - ingresses
+    verbs: ["*"]
+  - apiGroups: ["policy"]
+    resources:
+      - poddisruptionbudgets
+    verbs: ["*"]
+  - apiGroups: ["coordination.k8s.io"]
+    resources:
+      - leases
+    verbs: ["*"]
+  - apiGroups: ["storage.k8s.io"]
+    resources:
+      - csidrivers
+      - csinodes
+      - csistoragecapacities
+      - storageclasses
+      - volumeattachments
+    verbs: ["*"]
+  - apiGroups: ["apiextensions.k8s.io"]
+    resources:
+      - customresourcedefinitions
+    verbs: ["*"]
+  - apiGroups: ["admissionregistration.k8s.io"]
+    resources:
+      - mutatingadmissionpolicies
+      - mutatingwebhookconfigurations
+      - validatingadmissionpolicies
+      - validatingwebhookconfigurations
+    verbs: ["*"]
+  - apiGroups: ["metrics.k8s.io"]
+    resources:
+      - nodes
+      - pods
+    verbs: ["get", "list", "watch"]
+  - apiGroups: ["gateway.networking.k8s.io"]
+    resources:
+      - gatewayclasses
+      - gateways
+      - httproutes
+      - referencegrants
+      - tcproutes
+      - tlsroutes
+      - udproutes
+    verbs: ["*"]
+  - apiGroups: ["cert-manager.io"]
+    resources:
+      - certificates
+      - certificaterequests
+      - clusterissuers
+      - issuers
+    verbs: ["*"]
+  - apiGroups: ["monitoring.coreos.com"]
+    resources:
+      - alertmanagers
+      - podmonitors
+      - prometheuses
+      - prometheusrules
+      - servicemonitors
+      - thanosrulers
+    verbs: ["*"]
+  - apiGroups: ["argoproj.io"]
+    resources:
+      - applications
+      - appprojects
+    verbs: ["*"]
+  - apiGroups: ["traefik.containo.us", "traefik.io"]
+    resources:
+      - ingressroutes
+      - middlewares
+      - traefikservices
+    verbs: ["*"]
+  - apiGroups: ["k8s.cni.cncf.io"]
+    resources:
+      - network-attachment-definitions
+    verbs: ["*"]
+  - apiGroups: ["kubevirt.io"]
+    resources:
+      - virtualmachineinstances
+      - virtualmachines
+    verbs: ["*"]
+  - apiGroups: ["subresources.kubevirt.io"]
+    resources:
+      - "*"
+    verbs: ["*"]
+  - apiGroups: ["instancetype.kubevirt.io"]
+    resources:
+      - "*"
+    verbs: ["*"]
+  - apiGroups: ["cdi.kubevirt.io"]
+    resources:
+      - "*"
+    verbs: ["*"]
+  - apiGroups: ["pool.kubevirt.io"]
+    resources:
+      - "*"
+    verbs: ["*"]
+  - apiGroups: ["cluster.x-k8s.io"]
+    resources:
+      - clusters
+      - machinedeployments
+      - machinepools
+      - machines
+      - machinesets
+    verbs: ["*"]
+  - apiGroups: ["controlplane.cluster.x-k8s.io"]
+    resources:
+      - kubeadmcontrolplanes
+    verbs: ["*"]
+  - apiGroups: ["bootstrap.cluster.x-k8s.io"]
+    resources:
+      - kubeadmconfigs
+      - kubeadmconfigtemplates
+    verbs: ["*"]
+  - apiGroups: ["infrastructure.cluster.x-k8s.io"]
+    resources:
+      - kubevirtclusters
+      - kubevirtmachinetemplates
+    verbs: ["*"]
+  - apiGroups: ["addons.cluster.x-k8s.io"]
+    resources:
+      - clusterresourcesets
+    verbs: ["*"]
+
 ---
 apiVersion: rbac.authorization.k8s.io/v1
-kind: RoleBinding
+kind: ClusterRoleBinding
 metadata:
-  name: k8s-mgmt-pod
+  name: k8s-mgmt-pod-access
 subjects:
   - kind: ServiceAccount
     name: k8s-mgmt-pod
+    namespace: k8s-mgmt-pod
 roleRef:
   apiGroup: rbac.authorization.k8s.io
-  kind: Role
+  kind: ClusterRole
   name: k8s-mgmt-pod

k8s/service.yaml

@@ -8,7 +8,7 @@ spec:
     app.kubernetes.io/name: k8s-mgmt-pod
   ports:
     - name: ssh
-      port: 22
+      port: 2222
       targetPort: ssh
       protocol: TCP
     - name: webssh
@@ -27,7 +27,7 @@ spec:
 #     app.kubernetes.io/name: k8s-mgmt-pod
 #   ports:
 #     - name: ssh
-#       port: 22
+#       port: 2222
 #       targetPort: ssh
 #     - name: webssh
 #       port: 3000

renovate.json

@@ -0,0 +1,16 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:recommended"
+  ],
+  "customManagers": [
+    {
+      "customType": "regex",
+      "managerFilePatterns": ["/^Dockerfile$/", "/Dockerfile.*/"],
+      "matchStrings": [
+        "# renovate: datasource=(?<datasource>.*?) depName=(?<depName>.*?)\\s+ARG .*?_VERSION=(?<currentValue>.*)\\s"
+      ],
+      "datasourceTemplate": "{{{datasource}}}"
+    }
+  ]
+}