Containerapp Diagnostics

1#!/usr/bin/env bash
2# containerapp-diagnostics.sh
3# Collects diagnostic information for an Azure Container App in one pass and
4# prints it as clearly labeled sections: revisions, registry config, ingress
5# config, and recent logs. The script only gathers and labels output; it does
6# not interpret the results.
7#
8# Usage:
9#   ./containerapp-diagnostics.sh --name <app> --resource-group <rg> [--subscription <id>]
10#   ./containerapp-diagnostics.sh <app> <rg> [subscription-id]
11#
12# Examples:
13#   ./containerapp-diagnostics.sh --name my-app --resource-group my-rg
14#   ./containerapp-diagnostics.sh my-app my-rg
15
16set -euo pipefail
17
18APP=""
19RG=""
20SUBSCRIPTION=""
21
22usage() {
23    echo "Usage: $0 --name <app> --resource-group <rg> [--subscription <id>]" >&2
24}
25
26# Requires a value to follow the given flag; errors out otherwise.
27require_value() {
28    if [ "$2" -lt 2 ]; then
29        echo "Error: option '$1' requires a value." >&2
30        usage
31        exit 1
32    fi
33}
34
35# Support both --flag and positional styles.
36POSITIONAL=()
37while [ $# -gt 0 ]; do
38    case "$1" in
39        --name|-n)             require_value "$1" "$#"; APP="$2"; shift 2 ;;
40        --resource-group|-g)   require_value "$1" "$#"; RG="$2"; shift 2 ;;
41        --subscription|-s)     require_value "$1" "$#"; SUBSCRIPTION="$2"; shift 2 ;;
42        --*|-?)                echo "Error: unknown option '$1'." >&2; usage; exit 1 ;;
43        *)                     POSITIONAL+=("$1"); shift ;;
44    esac
45done
46
47if [ -z "$APP" ] && [ "${#POSITIONAL[@]}" -ge 1 ]; then APP="${POSITIONAL[0]}"; fi
48if [ -z "$RG" ] && [ "${#POSITIONAL[@]}" -ge 2 ]; then RG="${POSITIONAL[1]}"; fi
49if [ -z "$SUBSCRIPTION" ] && [ "${#POSITIONAL[@]}" -ge 3 ]; then SUBSCRIPTION="${POSITIONAL[2]}"; fi
50
51if [ -z "$APP" ] || [ -z "$RG" ]; then
52    usage
53    exit 1
54fi
55
56SUB_ARGS=()
57if [ -n "$SUBSCRIPTION" ]; then SUB_ARGS=(--subscription "$SUBSCRIPTION"); fi
58
59echo "=== Container App Diagnostics: $APP (resource group: $RG) ==="
60echo "Collecting revisions, registry/ingress configuration, and recent logs."
61echo ""
62
63echo "--- Revisions ---"
64az containerapp revision list --name "$APP" -g "$RG" "${SUB_ARGS[@]}" -o table || echo "(failed to list revisions)"
65echo ""
66
67echo "--- Registry Config ---"
68az containerapp show --name "$APP" -g "$RG" "${SUB_ARGS[@]}" \
69    --query "properties.configuration.registries" || echo "(failed to read registry config)"
70echo ""
71
72echo "--- Ingress Config ---"
73az containerapp show --name "$APP" -g "$RG" "${SUB_ARGS[@]}" \
74    --query "properties.configuration.ingress" || echo "(failed to read ingress config)"
75echo ""
76
77echo "--- Recent Logs (last 20 lines) ---"
78az containerapp logs show --name "$APP" -g "$RG" "${SUB_ARGS[@]}" --tail 20 || echo "(failed to read logs)"
79echo ""
80
81echo "=== Diagnostics collection complete for $APP ==="