Group items tagged packer - Larvata

shared by 張旭 on 12 Apr 19 - No Cached

The configuration file used to define what image we want built and how is called a template in Packer terminology.
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JSON struck the best balance between human-editable and machine-editable, allowing both hand-made templates as well as machine generated templates to easily be made.
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keeping your secret keys out of the template
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validate the template by running packer validate example.json. This command checks the syntax as well as the configuration values to verify they look valid.
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At the end of running packer build, Packer outputs the artifacts that were created as part of the build.
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Packer only builds images. It does not attempt to manage them in any way.
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shared by 張旭 on 12 Apr 19 - No Cached

Packer can use a remote VMware Hypervisor to build the virtual machine.
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enable GuestIPHack
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When using a remote VMware Hypervisor, the builder still downloads the ISO and various files locally, and uploads these to the remote machine.
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Packer needs to decide on a port to use for VNC when building remotely.
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vnc_disable_password - This must be set to "true" when using VNC with ESXi 6.5 or 6.7
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remote_type (string) - The type of remote machine that will be used to build this VM rather than a local desktop product. The only value accepted for this currently is esx5. If this is not set, a desktop product will be used. By default, this is not set.
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shared by 張旭 on 12 Apr 19 - No Cached

User variables allow your templates to be further configured with variables from the command-line, environment variables, Vault, or files.
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define it either within the variables section within your template, or using the command-line -var or -var-file flags.
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If the default value is null, then the user variable will be required.
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User variables are available globally within the rest of the template.
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The env function is available only within the default value of a user variable, allowing you to default a user variable to an environment variable.
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As Packer doesn't run inside a shell, it won't expand ~
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To set user variables from the command line, the -var flag is used as a parameter to packer build (and some other commands).
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Variables can also be set from an external JSON file. The -var-file flag reads a file containing a key/value mapping of variables to values and sets those variables.
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-var-file=
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sensitive variables won't get printed to the logs by adding them to the "sensitive-variables" list within the Packer template
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shared by 張旭 on 12 Apr 19 - No Cached

All strings within templates are processed by a common Packer templating engine, where variables and functions can be used to modify the value of a configuration parameter at runtime.
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Anything template related happens within double-braces: {{ }}.
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Functions are specified directly within the braces, such as {{timestamp}}
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Template variables are prefixed with a period and capitalized, such as {{.Variable}}.
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Functions perform operations on and within strings
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the {{timestamp}} function can be used in any string to generate the current timestamp.
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pwd - The working directory while executing Packer.
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template_dir - The directory to the template for the build.
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uuid - Returns a random UUID.
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user - Specifies a user variable.
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Template variables are special variables automatically set by Packer at build time.
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www.packer.io

shared by crazylion lee on 17 Jan 14 - No Cached

shared by 張旭 on 12 Apr 19 - No Cached

shared by 張旭 on 03 Apr 19 - No Cached

A machine image is a single static unit that contains a pre-configured operating system and installed software which is used to quickly create new running machines.
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