Give the puppetserver compilers the Vault cert helpers (#482)

profiles::pki::vault and profiles::ssh::sign shell out to
/usr/local/bin/certmanager and /usr/local/bin/sshsignhost from generate()
during catalog compilation. Neither binary exists in the compiler image, so
every node using them fails to compile.

- install certmanager v0.2.0 and sshsignhost v0.1.0 onto the shared bin volume with sha256 verification
- wrap both at /usr/local/bin from a pre-default entrypoint hook, failing startup loudly if either is missing
- mount read-only Vault configs for both: kubernetes auth on k8s/au/syd1, internal CA verified rather than skipped

Reviewed-on: #482
Co-authored-by: unkin-agent <unkin-agent@unkin.net>
Co-committed-by: unkin-agent <unkin-agent@unkin.net>

apps/base/puppet/resources/compiler/20-vault-helpers.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+set -euo pipefail
+
+BIN_DIR=/opt/bin
+CA=/opt/vault-ca-cert.crt
+
+if [ ! -s "$CA" ]; then
+  echo "FATAL: $CA missing or empty; certmanager and sshsignhost cannot verify Vault" >&2
+  exit 1
+fi
+
+# profiles::pki::vault and profiles::ssh::sign shell out to fixed /usr/local/bin
+# paths from generate(); the binaries ship on the shared PVC, and /usr/local/bin
+# lives in the image. Wrappers rather than symlinks because neither binary reads
+# a CA path from its config: SSL_CERT_FILE scopes the internal CA to these two
+# processes instead of the puppetserver JVM's own trust store.
+for bin in certmanager sshsignhost; do
+  if [ ! -x "$BIN_DIR/$bin" ]; then
+    echo "FATAL: $BIN_DIR/$bin missing; generate() would abort every catalog compile" >&2
+    exit 1
+  fi
+  cat > "/usr/local/bin/$bin" <<WRAPPER
+#!/bin/sh
+SSL_CERT_FILE=$CA
+export SSL_CERT_FILE
+exec $BIN_DIR/$bin "\$@"
+WRAPPER
+  chmod 0755 "/usr/local/bin/$bin"
+done

apps/base/puppet/resources/compiler/certmanager.yaml

@@ -0,0 +1,12 @@
+---
+vault:
+  addr: https://vault.service.consul:8200
+  auth_method: kubernetes
+  k8s_mount: k8s/au/syd1
+  k8s_role: puppet_certmanager
+  jwt_path: /var/run/secrets/kubernetes.io/serviceaccount/token
+  mount_point: pki_int
+  role_name: servers_default
+  output_path: /tmp/certmanager
+  tls_skip_verify: false
+  timeout: 30s

apps/base/puppet/resources/compiler/sshsignhost.yaml

@@ -0,0 +1,11 @@
+---
+vault:
+  addr: https://vault.service.consul:8200
+  auth_method: kubernetes
+  k8s_mount: k8s/au/syd1
+  k8s_role: puppet_sshsigner
+  jwt_path: /var/run/secrets/kubernetes.io/serviceaccount/token
+  mount_point: sshca
+  role_name: signhost
+  tls_skip_verify: false
+  timeout: 30s