Docker container can't download WordPress installation files automatically

Question

I have the following compose file:

version: "3"        
services:
    wordpress:
        image: visiblevc/wordpress
        privileged: true
        network_mode: bridge #should help?
        # required for mounting bindfs
        cap_add:
            - SYS_ADMIN
        devices:
            - /dev/fuse
        # required on certain cloud hosts
        security_opt:
            - apparmor:unconfined
        ports:
            - 8080:80
            - 8081:443
      ...WP parameters ommitted for brewity

When I run it, I get the following error:

When I use the CLI and curl the SAME url, I can download the information.

What should I change in the yaml to make it work automatically?

UPDATE:

As curl works manually, I don't think it as a DNS resolve error, but to make sure, I modified the resolv.conf file to a valid nameserver address:

Unfortunately, it didn't solve the issue.

Answer 1

Try to put on image this:

image: visiblevc/wordpress:latest

You need to specify the tag.

Answer 2

We checked the initialization shell script of the Docker image. We couldn't determine why the resolve fails when wp core download was called so we created a workaround.

We added a pre-init section inside the script to use the explicit curl commands that worked as demonstrated in the CLI. As a sideeffect, we download the necessary files so it bypasses the need of downloading and the potential resolve timeout. Note: we needed several curl calls for the API as the resolve kept failing after only one call.

This is how the new script starts:

h1 Pre-init
    curl "https://api.wordpress.org/core/version-check/1.7/?locale=en_US" >/dev/null
    curl "https://downloads.wordpress.org/release/wordpress-5.9.3.zip" --output wordpress-5.9.3.zip
    curl "https://api.wordpress.org/core/version-check/1.7/?locale=en_US" >/dev/null
    curl "https://downloads.wordpress.org/plugin/classic-editor.1.6.2.zip" --output classic-editor.1.6.2.zip
    curl "https://downloads.wordpress.org/translation/core/5.9.3/hu_HU.zip" --output hu_HU.zip    
    curl "https://api.wordpress.org/core/version-check/1.7/?locale=en_US" >/dev/null
h1 'Begin WordPress Installation'

Using this script, the installation succeeded.

Answer 3

Here's the code I used for the AR QuickLook

class ARQLViewController: UIViewController, QLPreviewControllerDataSource {
let assetName = "Pantone"
let assetType = "usdz"
let allowsContentScaling = false
let canonicalWebPageURL = URL(string: "nil")

override func viewDidAppear(_ animated: Bool) {
    let previewController = QLPreviewController()
    previewController.dataSource = self
    present(previewController, animated: true, completion: nil)
}

func numberOfPreviewItems(in controller: QLPreviewController) -> Int {
    return 1
}

func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -> QLPreviewItem {
    guard let path = Bundle.main.path(forResource: assetName, ofType: assetType) else {
        fatalError("Couldn't find the supported asset file.")
    }
    let url = URL(fileURLWithPath: path)
    let previewItem = ARQuickLookPreviewItem(fileAt: url)
    previewItem.allowsContentScaling = allowsContentScaling // default = true
    previewItem.canonicalWebPageURL = canonicalWebPageURL   // default = nil
    return previewItem
}}