Add kafka.sh script for Kafka installation and updates

This script installs and updates Apache Kafka, handling configuration backups and version checks.

ct/kafka.sh

@@ -0,0 +1,83 @@
+#!/usr/bin/env bash
+source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/build.func)
+# Copyright (c) 2021-2025 community-scripts ORG
+# Author: YourNameHere
+# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
+# Source: https://kafka.apache.org/
+
+APP="Kafka"
+var_tags="${var_tags:-messaging;streaming;kraft}"
+var_cpu="${var_cpu:-2}"
+var_ram="${var_ram:-2048}"
+var_disk="${var_disk:-10}"
+var_os="${var_os:-debian}"
+var_version="${var_version:-12}"
+var_unprivileged="${var_unprivileged:-1}"
+
+header_info "$APP"
+variables
+color
+catch_errors
+
+function update_script() {
+    header_info
+    check_container_storage
+    check_container_resources
+
+    if [[ ! -d /opt/kafka ]]; then
+        msg_error "No ${APP} Installation Found!"
+        exit 1
+    fi
+
+    RELEASE=$(curl -fsSL https://downloads.apache.org/kafka/ \
+        | grep -oP '(?<=href=")[0-9]+\.[0-9]+\.[0-9]+(?=/")' \
+        | sort -V | tail -1)
+    CURRENT=$(cat /opt/kafka/.version 2>/dev/null || echo "0.0.0")
+
+    if [[ "$RELEASE" == "$CURRENT" ]]; then
+        msg_ok "No update required. ${APP} is already at v${CURRENT}."
+        exit 0
+    fi
+
+    msg_info "Stopping ${APP}"
+    systemctl stop kafka
+    msg_ok "Stopped ${APP}"
+
+    msg_info "Backing up configuration"
+    cp -a /opt/kafka/config /tmp/kafka-config.bak
+    msg_ok "Backed up configuration"
+
+    msg_info "Updating ${APP} to v${RELEASE}"
+    cd /tmp
+    curl -fsSLO "https://downloads.apache.org/kafka/${RELEASE}/kafka_2.13-${RELEASE}.tgz"
+    rm -rf /opt/kafka.old
+    mv /opt/kafka /opt/kafka.old
+    tar -xzf "kafka_2.13-${RELEASE}.tgz" -C /opt
+    mv "/opt/kafka_2.13-${RELEASE}" /opt/kafka
+    cp -a /tmp/kafka-config.bak/. /opt/kafka/config/
+    echo "${RELEASE}" > /opt/kafka/.version
+    chown -R kafka:kafka /opt/kafka
+    rm -f "/tmp/kafka_2.13-${RELEASE}.tgz"
+    rm -rf /tmp/kafka-config.bak /opt/kafka.old
+    msg_ok "Updated ${APP} to v${RELEASE}"
+
+    msg_info "Starting ${APP}"
+    systemctl start kafka
+    msg_ok "Started ${APP}"
+
+    msg_ok "Update Complete"
+    exit 0
+}
+
+start
+build_container
+description
+
+msg_ok "Completed Successfully!\n"
+echo -e "${CREATING}${GN}${APP} setup has been successfully initialized!${CL}"
+echo -e "${INFO}${YW} Kafka broker is available at:${CL}"
+echo -e "${TAB}${GATEWAY}${BGN}${IP}:9092${CL}"
+echo -e "${INFO}${YW} Controller listener (internal):${CL}"
+echo -e "${TAB}${GATEWAY}${BGN}${IP}:9093${CL}"
+echo -e "${INFO}${YW} Credentials and cluster info stored in:${CL}"
+echo -e "${TAB}${GATEWAY}${BGN}/root/kafka.creds${CL}"