add some verify options

scripts/verify.sh

@@ -1,6 +1,77 @@
-#!/bin/bash
+#!/usr/bin/env bash
+
+
+public::common::log() {
+    if [ $2 == "fail" ];then
+        echo -e $(date +"[%Y%m%d %H:%M:%S]: ") $1 "\033[31m Verify Failed! \033[0m"
+    else
+        echo -e $(date +"[%Y%m%d %H:%M:%S]: ") $1 "\033[32m Verify Passed! \033[0m"
+    fi
+}
+
+# func for checking kernel version >= 3.10
+public::check::kernel() {
+    current_kernel_version=$(uname -r)
+    required_kernel_version=3.10
+
+    if [ "$(printf '%s\n' "$required_kernel_version" "$current_kernel_version" | sort -V | head -n1)" = "$required_kernel_version" ] ;then
+        public::common::log "Check if kernel version >= $required_kernel_version." "pass"
+    else
+        public::common::log "Check if kernel version >= $required_kernel_version." "fail"
+        exit 1
+    fi
+}
+
+# check kernel version >= 3.10
+public::check::kernel
+
+
+# func for checking if sshd is running and listen on port 22
+public::check::sshd() {
+    netstat -tlpn | grep "\b22\b" |grep sshd >/dev/null 2>&1
+    if [ $? -ne 0 ];then
+        public::common::log "Check if sshd is running and listen on port 22." "fail"
+        exit 1
+    else
+        public::common::log "Check if sshd is running and listen on port 22." "pass"
+    fi
+}
+
+# check if sshd is running and listen on port 22
+public::check::sshd
+
+
+# func for checking if cloud-init is installed
+public::check::cloudinit() {
+    which cloud-init >/dev/null 2>&1
+    if [ $? -ne 0 ];then
+        public::common::log "Check if cloud-init is installed." "fail"
+        exit 1
+    else
+        public::common::log "Check if cloud-init is installed." "pass"
+    fi
+}
+
+# check if cloud-init is installed
+public::check::cloudinit
+
+
+# func for checking if clean up kubeadm
+public::check::kubeadm() {
+    which kubeadm >/dev/null 2>&1
+    if [ $? -ne 0 ];then
+        public::common::log "Check if clean up kubeadm." "pass"
+    else
+        public::common::log "Check if clean up kubeadm." "fail"
+        exit 1
+    fi
+}
+
+# check if clean up kubeadm
+public::check::kubeadm
+
 
 #TODO
 #E.g. Check chronyd or ntpd is configured properly
 
-#E.g. Check iptables
+#E.g. Check iptables