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Adding Templates to write_files Support

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Preface

It should be noted that these additions, combined with testing on a Windows workstation revealed a few errors in the previous version of script. These have been corrected as part of the enhancement process, in part because some new functionality requires the fixes.

Notes and What’s New

  • We use the same userdata-default.yaml.jinja — it did not require updates
  • Like verbatim_files_dirs, we add template_files_dirs as a config key which holds a colon-separated list of directories to walk.
    • Each file in the directory tree is assumed to be a template for a file which belongs in the corresponding location on the target (e.g. if templates/pytest001 is a directory given in template_files_dirs then templates/pytest001/etc/systemd/system/set-ip6-netplan-once.timer is rendered as a Jinja template, using the same -userdata-vars as the main userdata-default.yaml.jinja and the result is a treated as a file to be located at /etc/systemd/system/set-ip6-netplan-once.timer in the instance to be created).
    • As with verbatim files, compression is attempted and the result is base64 encoded.
  • As mentioned the variables in the file templates are filled with values from the same -userdata-vars section as the main userdata template.
  • userdata_vars dictionary is now created from a deep copy of the -userdata-vars section in the config file, instead of only a shallow copy. This was necessary so that earlier instances' data do not added to later instances' data.
  • Fixes have been added for use of the script on Windows (improved cross-platform behaviour).

Sample Generated Userdata

#cloud-config
disable_root: true
preserve_hostname: false
manage_etc_hosts: true
ssh_pwauth: false
users:
  - name: anadmin
    groups:
      - adm
      - staff
      - sudo
    homedir: /local-home/anadmin
    lock_passwd: false
    hashed_passwd: $6$rounds=4096$Uai52ED7FnpSxVd1$iY6tuSJ2dpm1Owa41NUSvp/H1M39ZnVjiP9OWK3r9I/mm4lV.vaHlUodCWQOUGv9paOHZa8gh/9MX4.It6cAH/
    shell: /bin/bash
    ssh_authorized_keys:
      - ssh-rsa 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 demo@keygen
      - ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPx1XkJr+YY1eiPq1kVSuqv7ufMppwd+9JN2NnyQWkn7 another_key@keygen
timezone: America/Toronto
hostname: pytest001
fqdn: pytest001.example.com
ntp:
  ntp_client: chrony
  enabled: true
package_update: true
package_upgrade: true
packages:
  - apt-cacher-ng
  - dnsmasq
  - postfix
package_reboot_if_required: true
mounts:
  - [ "/dev/avg1/vault", "/opt/vault", "ext4", "defaults,noexec,nodev", "0", "2" ]
  - [ "/dev/avg1/configs", "/opt/configs", "ext4", "defaults,noexec,nodev", "0", "2" ]
  - path: /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg
    encoding: b64
    content: |
            bmV0d29yazoge2NvbmZpZzogZGlzYWJsZWR9
  - path: /etc/aliases
    encoding: gz+b64
    content: |
            H4sIALYtyWAC/03LOwqAMBAE0D6nWLC3s7HyDp5giKsGstmQrJ/jS7DJwDSPmYFWZhIkmggxoHKlXUurwFzWaoJqXGZqQcImIbmiar9Q7wu/kBx59CruxhX7Ufu4qMcD8+fc4wcXA61rhQAAAA==
  - path: /etc/sysctl.conf
    encoding: b64
    content: |
            bmV0LmlwdjQuaXBfZm9yd2FyZD0xCg==
  - path: /etc/apt-cacher-ng/zzz_override.conf
    encoding: gz+b64
    content: |
            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
  - path: /etc/ssh/sshd_config.d/alternate_port.conf
    encoding: b64
    content: |
            UG9ydCAyNzIyMQ==
  - path: /etc/systemd/system/set-ipv6-netplan-once.service
    encoding: b64
    content: |
            W1VuaXRdCkRlc2NyaXB0aW9uPVNldCBOZXRwbGFuIGZvciBJUHY2IE9uY2UKCltTZXJ2aWNlXQpUeXBlPW9uZXNob3QKRXhlY1N0YXJ0PS91c3IvbG9jYWwvc2Jpbi9zZXQtaXB2Ni1uZXRwbGFuLW9uY2Uuc2g=
  - path: /etc/ufw/user.rules
    encoding: gz+b64
    content: |
            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
  - path: /etc/ufw/user6.rules
    encoding: gz+b64
    content: |
            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
  - path: /etc/vault/deploy-secrets/010_admin_password_ssh
    encoding: gz+b64
    content: |
            H4sIALYtyWAC/42OwQrCMBBE7/mKtXrQQ031Igj6K2VNVhOSJiWbVCp+vKV4EgXPM/PmLRfyYoNkIwQpE6FCqykhhuNqPWDxGdwAN8pQXy15feqR+R6TBiaVKMt+zMS5aXYSdWdDW5hSOyWaQrboeVPBE5SZZ1qUDtlB0xwOonPaJqh7kD4q9LWJHUkMM0VueRJ6l/dT+ZsJlmxisg/SraOR/xWC869D+UEUL3S7Ju0cAQAA
  - path: /etc/vault/deploy-secrets/020_apt_cacher_ng_admin
    encoding: gz+b64
    content: |
            H4sIALYtyWAC/4VP22rDMAx991doWSEbzHWaDQoeG/QP9gfDddTY1LU9S+mWv1+aQkuf+iCBdC6c8/igtj4qckIMB0N7aJr1WqB1CapNd/BxM7DTYGzszenUi6ejGQLD/gg9Msidx9B9XHAgtAVZ5ZGRuGlWyuQcvDXsU/w+g/RcwadCthPG0hrrsMjYqwkdiudxaVPcCev6kuGGAXdFgkZiPFgOgNFsA4KUMf3e2lyrtu25ar2xP4MvqLVjzlp/lfQ3QjUfSoVkTXCJWL+u3lpVvYsbOt3l19e6p5mjLjvVtPmkm0JjB9KDRKhXLwtSs+u8VV9fSitKQ7FIy+CJJ7kz5LxNJc8P8Q+SB2boygEAAA==
  - path: /etc/vault/deploy-secrets/980_vault-secrets
    encoding: gz+b64
    content: |
            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
  - path: /etc/vault.d/vault.hcl
    encoding: gz+b64
    content: |
            H4sIALYtyWAC/z2MsQ7CMAxEd3+FFWZo2gWExM7I0B2ZxqURhlSxy4L4d4yQ0E137/SWjAccSZQB7lKGm1erize1UunKGMYsHPAFiDPZ5Dw0ZbbmSYtYk8gowBtghce+P6FkNX5wxTW6jWQqavAfgw3zT0UpVVb92tpuu4medr/rYgwOTfScstJF2A+t6z+FJEE7pwAAAA==
  - path: /local-home/anadmin/.bash_aliases
    encoding: b64
    content: |
            ZXhwb3J0IFZBVUxUX0FERFI9Imh0dHA6Ly8xMjcuMC4wLjE6ODIwMC8i
  - path: /root/.bash_aliases
    encoding: b64
    content: |
            ZXhwb3J0IFZBVUxUX0FERFI9Imh0dHA6Ly8xMjcuMC4wLjE6ODIwMC8i
  - path: /root/run-vault-scripts.sh
    encoding: b64
    content: |
            IyEvYmluL3NoCgpleHBvcnQgVkFVTFRfVE9LRU49IiQxIgpleHBvcnQgVkFVTFRfQUREUj0iaHR0cDovLzEyNy4wLjAuMTo4MjAwLyIKCnJ1bi1wYXJ0cyAtLW5ldy1zZXNzaW9uIC0tZXhpdC1vbi1lcnJvciAvZXRjL3ZhdWx0L2RlcGxveS1zZWNyZXRzCg==
  - path: /etc/netplan/52-cloud-init.yaml
    encoding: gz+b64
    content: |
            H4sIALYtyWAC/22O4Q6CMAyE//sUfQFmGMQob9OwMyyysbQL8viygBKN//r1rr2LyM9JHt2JaIaon2JHdgXkARKRtSgrRm23icgNfWo7uvOo2FfsnEAV+vYQVVTfrKkvV9NYY8+23ZXIAQopYYdZwdIPB5fzJH7mDIOFQxph+il86c32vaT4WJUGhiXxx/On02+rF3FbR5/9AAAA
  - path: /etc/systemd/system/set-ipv6-netplan-once.service
    encoding: b64
    content: |
            W1VuaXRdCkRlc2NyaXB0aW9uPVNldCBOZXRwbGFuIGZvciBJUHY2IE9uY2UKCltTZXJ2aWNlXQpUeXBlPW9uZXNob3QKRXhlY1N0YXJ0PS91c3IvbG9jYWwvc2Jpbi9zZXQtaXB2Ni1uZXRwbGFuLW9uY2Uuc2g=
  - path: /etc/systemd/system/set-ipv6-netplan-once.timer
    encoding: b64
    content: |
            W1VuaXRdCkRlc2NyaXB0aW9uPUxvb2sgZm9yIElQdjYgZXZlcnkgNjBzIGFmdGVyIGd1YXJhbnRlZWQgZXhwaXJ5IChUVEwpCgpbVGltZXJdCk9uQm9vdFNlYz0xMjAKT25Vbml0QWN0aXZlU2VjPTYwCgpbSW5zdGFsbF0KV2FudGVkQnk9dGltZXJzLnRhcmdldA==
  - path: /usr/local/bin/set-ipv6-netplan-once.sh
    encoding: gz+b64
    content: |
            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

Code

For the complete code, config, and files that generated this output see: X-003 of Set-005 in ivc-in-the-wtg-experiments.

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