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87 lines
2.4 KiB
Bash
87 lines
2.4 KiB
Bash
#!/usr/bin/env bash
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# vim:ts=4:sts=4:sw=4:et
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#
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# Author: Hari Sekhon
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# Date: 2021-06-03 18:11:23 +0100 (Thu, 03 Jun 2021)
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#
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# https://github.com/HariSekhon/DevOps-Bash-tools
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#
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# License: see accompanying Hari Sekhon LICENSE file
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#
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# If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
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#
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# https://www.linkedin.com/in/HariSekhon
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#
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set -euo pipefail
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[ -n "${DEBUG:-}" ] && set -x
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srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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# shellcheck disable=SC1090
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. "$srcdir/lib/utils.sh"
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# shellcheck disable=SC2034,SC2154
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usage_description="
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Curls the current Kubernetes cluster's Nginx Ingress controller's external IP address using the given URL
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Useful for debugging Ingress Routing + SSL certificates directly by bypassing DNS -> CDN addresses such as Cloudflare
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Requires kubectl to be installed and configured with the target cluster selected as the current context
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in order to find the Ingress Controller's external IP address
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Tips:
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- Make sure to specify the correct prefix eg. https:// and path suffix so that you don't hit a 302 redirect back to the CDN address
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- Use '-kv' curl switches to see the cert and header info
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Prints the curl command inferred as it is used so you can see what you're doing
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"
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# used by usage() in lib/utils.sh
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# shellcheck disable=SC2034
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usage_args="<url> [<curl_options>]"
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help_usage "$@"
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min_args 1 "$@"
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url="$1"
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shift || :
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shopt -s nocasematch
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if ! [[ "$url" =~ :// ]]; then
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url="http://$url"
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fi
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#shopt -s extglob
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#host="${url#http?(s)://}"
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#shopt -u extglob
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host="${url#http://}"
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host="${host#https://}"
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# strip /path
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host="${host%%[;/]*}"
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# if url prefix doesn't strip successfully, the above line results in host='https:'
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if [[ "$host" =~ : ]]; then
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die "Host parse failure from url: '$url', inferred host as '$host'"
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fi
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# TODO: extend this to detect and return the IPs of other ingress controllers if deployed eg. older nginx-ingress, traefik, haproxy etc.
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IP="$(kubectl get svc ingress-nginx-controller -n ingress-nginx -o 'jsonpath={.spec.loadBalancerIP}')"
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if [[ "$url" =~ ^http:// ]]; then
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port=80
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else
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port=443
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fi
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# this works for ingress path routing but not SSL verification, forcing you to use -k and not debugging the certificate
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#url="${url/:\/\/$host/://$IP}"
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#curl -H "Host: $host" "$url" "$@"
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set -x
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curl "$url" --resolve "$host:$port:$IP" "$@"
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