Update to 2022-09-06 18:00

roles/vault/templates/consul-template-vault.service.j2

@@ -0,0 +1,20 @@
+[Unit]
+Description="HashiCorp consul-template"
+Documentation=https://github.com/hashicorp/consul-template
+Requires=network-online.target
+After=network-online.target
+After=vault.service
+ConditionFileNotEmpty={{ vault_root_dir }}/consul-template/consul-template.hcl
+
+[Service]
+Type=simple
+ExecStart=/usr/local/bin/consul-template -config={{ vault_root_dir }}/consul-template/consul-template.hcl
+SuccessExitStatus=12
+ExecReload=/bin/kill --signal HUP $MAINPID
+KillSignal=SIGINT
+Restart=on-failure
+RestartSec=2
+
+[Install]
+WantedBy=multi-user.target
+

roles/vault/templates/consul-template.hcl.j2

@@ -0,0 +1,18 @@
+vault {
+  address      = "{{ vault_secrets.vault_address }}"
+  token        = "{{ vault_secrets.vault_token }}"
+  unwrap_token = false
+}
+
+{% if vault_secrets.nomad.enabled %}
+template {
+  source          = "{{ vault_root_dir }}/consul-template/nomad_client_bundle.json.tpl"
+  left_delimiter  = "[["
+  right_delimiter = "]]"
+  destination     = "{{ vault_root_dir }}/tmp/nomad_client_bundle.json"
+  perms           = 0600
+  exec {
+    command = "{{ vault_root_dir }}/bin/update_nomad_cert {{ vault_secrets.nomad.token }} {{ vault_secrets.vault_token }}"
+  }
+}
+{% endif %}

roles/vault/templates/nomad_client_bundle.json.tpl.j2

@@ -0,0 +1,3 @@
+[[ with secret "{{ vault_secrets.nomad.pki.path }}/issue/{{ vault_secrets.nomad.pki.role }}" "ttl={{ vault_secrets.nomad.pki.ttl }}" "common_name={{ vault_secrets.nomad.pki.cn }}" ]]
+[[ .Data | toJSONPretty ]]
+[[ end ]]

roles/vault/templates/update_nomad_cert.j2

@@ -0,0 +1,29 @@
+#!/bin/sh
+  
+set -eo pipefail
+
+NOMAD_TOKEN=$1
+VAULT_TOKEN=$2
+
+NOMAD_CERT_BUNDLE={{ vault_root_dir }}/tmp/nomad_client_bundle.json
+VAULT_ADDR={{ vault_conf.api_addr }}
+
+if [ "$(vault status -format=json| jq .is_self)" != "true" ]; then
+  echo "We're not the active vault, exiting"
+elif [ "$(vault status -format=json | jq .sealed)" != "false" ]; then
+  echo "Vault is sealed, exiting"
+elif [ "$(vault status -format=json | jq .initialized)" != "true" ]; then
+  echo "Vault is not initialized yet, exiting"
+else
+  echo Updating Vault certificate to access Nomad API
+  VAULT_TOKEN=$VAULT_TOKEN \
+    vault write {{ vault_secrets.nomad.secret.path }}/config/access \
+      address="{{ vault_secrets.nomad.address }}" \
+      token="$NOMAD_TOKEN" \
+      ca_cert="$(cat $NOMAD_CERT_BUNDLE | jq -r .issuing_ca)" \
+      client_cert="$(cat $NOMAD_CERT_BUNDLE | jq -r .certificate)" \
+      client_key="$(cat $NOMAD_CERT_BUNDLE | jq -r .private_key)"
+fi
+
+echo Removing Nomad client certificate from the filesystem
+rm -f $NOMAD_CERT_BUNDLE