{"id":2316,"date":"2023-01-12T11:32:20","date_gmt":"2023-01-12T11:32:20","guid":{"rendered":"https:\/\/www.easydeploy.io\/blog\/?p=2316"},"modified":"2023-04-03T11:42:33","modified_gmt":"2023-04-03T10:42:33","slug":"setup-ram-diskspace-ec2-instance-in-aws-cloudwatch","status":"publish","type":"post","link":"https:\/\/www.easydeploy.io\/blog\/setup-ram-diskspace-ec2-instance-in-aws-cloudwatch\/","title":{"rendered":"How to setup Memory (RAM) and diskspace monitor for EC2 instance in AWS CloudWatch"},"content":{"rendered":"

Monitoring the performance of your EC2 instances<\/strong><\/a> in AWS is crucial for ensuring that your applications run smoothly. One important aspect of monitoring is keeping an eye on the memory (RAM) and disk space usage of your instances. In this blog post, we will show you how to set up memory and disk space monitoring for your EC2 instances using AWS CloudWatch. <\/strong><\/span><\/p>\n

By following these steps, you will be able to track the usage of these resources in real-time and receive alerts when usage exceeds a certain threshold. This will help you identify potential issues and take action before they become critical, ensuring that your applications continue to perform at their best.<\/span><\/p>\n

Monitoring RAM and diskspace will prevent from server down & server crash so that now we are going to learn how to monitor RAM and Diskspace for our EC2 instance in a very simple way.<\/p>\n

Supported systems<\/strong><\/h2>\n

This monitoring scripts will be supported on the below Linux flavours<\/p>\n

    \n
  • \n

    Amazon Linux 2<\/p>\n<\/li>\n

  • \n

    Amazon Linux AMI 2014.09.2 and later<\/p>\n<\/li>\n

  • \n

    Red Hat Enterprise Linux 6.9 and 7.4<\/p>\n<\/li>\n

  • \n

    SUSE Linux Enterprise Server 12<\/p>\n<\/li>\n

  • \n

    Ubuntu Server 14.04 and 16.04<\/p>\n<\/li>\n<\/ul>\n

    Create an IAM role for the EC2 instance<\/strong><\/h2>\n

    Go to AWS console, open IAM service \u2192 under roles <\/strong>\u2192 click create role <\/strong><\/p>\n

    \n
    \n
    \n
    \n
    \"\"\"setup<\/div>\n<\/div>\n<\/div>\n<\/div>\n
    \n

    In the trusted entity type, make sure you are in AWS service <\/strong>then select EC2 <\/strong>under use case and click next<\/p>\n

    aws service<\/strong> \u2192 EC2<\/strong> \u2192 next<\/strong><\/p>\n

    \"setup<\/p>\n

    Now click create a policy<\/strong> to write our custom policy with cloud watch permissions<\/p>\n

    \"setup<\/p>\n

    click <\/span>JSON <\/strong>to write code<\/span><\/p>\n

    \"setup<\/p>\n

    Just remove the existing lines under the JSON section<\/p>\n

    \"setup<\/p>\n

    And paste the following JSON code under the JSON section and click next \u2192 next<\/strong><\/p>\n

    {\r\n\"Version\": \"2012-10-17\",\r\n\"Statement\": [\r\n{\r\n\"Action\": [\r\n\"cloudwatch:GetMetricStatistics\",\r\n\"cloudwatch:ListMetrics\",\r\n\"cloudwatch:PutMetricData\",\r\n\"ec2:DescribeTags\"\r\n],\r\n\"Effect\": \"Allow\",\r\n\"Resource\": \"*\"\r\n}\r\n]\r\n}<\/pre>\n
    \"setup<\/div>\n
    \n
    Now give the name for our new policy and then click create policy<\/strong><\/p>\n
    \n
    \n
    \n
    <\/div>\n
    \"setup<\/div>\n
    \n
    Go back to our previous tab, just refresh the page and search for your newly created policy by entering the name, which was you given in the previous step<\/p>\n
    \n
    \n
    \n
    \n
    <\/div>\n
    \"\"\"setup<\/div>\n
    \n
    Click Enter, <\/strong>select our policy, and click next<\/strong><\/p>\n
    \n
    \n
    \n
    <\/div>\n
    \"setup<\/div>\n
    \n
    Just give the name <\/strong>for our role and click create role<\/strong><\/p>\n
    \n
    \n
    \n
    <\/div>\n
    \"setup<\/div>\n
    \"setup<\/div>\n
    \n
    Now we have successfully created a new role for our EC2 instance with cloud watch permission<\/p>\n
    Attach the role to our EC2 instance<\/strong><\/h2>\n
    Open the EC2 service, select <\/strong>your instance \u2192 click Actions<\/strong><\/p>\n
    \"setup<\/p>\n
    Click security \u2192 modify IAM role <\/strong><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
    \n
    \n
    \n
    \n
    \"\"\"setup<\/div>\n
    \n
    Now just select our role <\/strong>and click update IAM role<\/strong><\/p>\n
    \n
    \n
    \n
    <\/div>\n
    \"setup<\/div>\n
    \n
    <\/h2>\n
    Install the required packages on the EC2 instance<\/strong><\/h2>\n
    for Amazon Linux 2 :<\/strong><\/p>\n
    sudo yum install -y perl-Switch perl-DateTime perl-Sys-Syslog perl-LWP-Protocol-https perl-Digest-SHA.x86_64<\/pre>\n<\/div>\n
    for Ubuntu : <\/strong><\/p>\n<\/div>\n
    sudo apt-get update\r\n\r\nsudo apt-get install unzip\r\n\r\nsudo apt-get install libwww-perl libdatetime-perl<\/pre>\n
    for Red Hat Enterprise Linux 7 : <\/strong><\/p>\n
    sudo yum install perl-Switch perl-DateTime perl-Sys-Syslog perl-LWP-Protocol-https perl-Digest-SHA --enablerepo=\"rhui-REGION-rhel-server-optional\" -y \r\n\r\nsudo yum install zip unzip<\/pre>\n
    for SUSE : <\/strong><\/p>\n
    In SUSE Linux Enterprise Server 12, you need to download the perl-Switch<\/code> package<\/p>\n
    wget http:\/\/download.opensuse.org\/repositories\/devel:\/languages:\/perl\/SLE_12_SP3\/noarch\/perl-Switch-2.17-32.1.noarch.rpm\r\n\r\nsudo rpm -i perl-Switch-2.17-32.1.noarch.rpm<\/pre>\n
    Now install packages : <\/span><\/p>\n
    sudo zypper install perl-Switch perl-DateTime\r\n\r\nsudo zypper install \u2013y \"perl(LWP::Protocol::https)\"<\/pre>\n
    Install monitoring scripts on EC2<\/strong><\/h2>\n
    To install the monitoring script, use the below command<\/p>\n
    curl https:\/\/aws-cloudwatch.s3.amazonaws.com\/downloads\/CloudWatchMonitoringScripts-1.2.2.zip -O<\/pre>\n
    \"setup<\/p>\n<\/div>\n<\/div>\n<\/div>\n
    unzip and remove the monitoring script zip file<\/p>\n
    unzip CloudWatchMonitoringScripts-1.2.2.zip && rm CloudWatchMonitoringScripts-1.2.2.zip<\/pre>\n
    \n
    \n
    \n
    \"setup<\/p>\n
    Change the directory to aws-scripts-mon <\/strong>you can see the below script files<\/p>\n
    cd aws-scripts-mon\r\nls<\/pre>\n
    \"setup<\/p>\n
    When we run the \u201c mon-put-instance-data.pl \u201c <\/strong>script file, it will send memory and disk space reports to the cloud watch<\/p>\n
    Schedule cron for monitoring script<\/strong><\/h2>\n
    if we schedule cron it will automatically run<\/strong> our monitoring script each time as we mentioned in the crontab, <\/strong>and our script will send report to cloud watch.<\/p>\n
    open crontab using below command<\/strong><\/p>\n
    crontab -e<\/span><\/code><\/span><\/div>\n
    \"setup<\/p>\n
    Now crontab file will be opened, just <\/span>replace your script path with the below command<\/strong> and then copy & paste the command in our crontab file,<\/span><\/p>\n
    and then save & exit.<\/p>\n
    *\/1 * * * * <path-to-script>\/aws-scripts-mon\/mon-put-instance-data.pl --mem-util --mem-used --mem-avail --disk-space-util --disk-space-used --disk-space-avail --disk-path=\/\r\n\r\n*\/1 * * * * \/home\/ec2-user\/aws-scripts-mon\/mon-put-instance-data.pl --mem-util --mem-used --mem-avail --disk-space-util --disk-space-used --disk-space-avail --disk-path=\/<\/pre>\n
    If we give cron like this \u201c *\/1 * * * * \u201d <\/strong>it will run our script at every single minute<\/p>\n
    \"setup<\/p>\n
    Crontab Issue<\/h2>\n
    If you are facing “Command not found” issue when using crontab , then follow the below steps to rectify this error.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
    \"\"<\/p>\n
    \n
    \n
    \n
    \n
    Install cron<\/p>\n
    yum install cronie cronie-anacron<\/pre>\n
    \n
    Now check using “crontab -e” command , it will works<\/p>\n
    Setup Cloud Watch metrics<\/strong><\/h2>\n
    Go to cloud watch<\/strong> service \u2192 Dashboards \u2192 create dashboard<\/strong><\/p>\n
    \n
    \n
    \n
    \n
    <\/div>\n
    \"\"\"setup<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
    Enter the name <\/strong>for our dashboard and then click create dashboard<\/strong><\/p>\n
    \"setup<\/p>\n
    Select the type of widget you want<\/p>\n
    \"setup<\/p>\n
    Select system\/linux<\/strong> metrics under custom namespace<\/strong><\/p>\n
    \"setup<\/p>\n
    click \u201c Filesystem, InstanceId, MountPath \u201c <\/strong><\/p>\n
    \"setup<\/p>\n
    \n
    \n
    \n
    \n
    Copy your instance id and filter out your instance by search<\/p>\n
    \n
    \n
    \n
    <\/div>\n
    \"setup<\/div>\n
    \n
    Filter and select all the three metrics of your instance and click create widget<\/strong><\/p>\n
    \n
    \n
    <\/div>\n
    \n
    \"setup<\/div>\n<\/div>\n
    \n
    Enter the Gauge range 0 – 100 <\/strong>and click create widget<\/strong><\/p>\n
    \n
    \n
    \n
    <\/div>\n
    \"setup<\/div>\n
    <\/div>\n
    Now under <\/span>Dashboards \u2192<\/strong> click our newly created dashboard , and then click the \u201c<\/span> +<\/strong> \u201c symbol at the right corner to add the balance metrics<\/span><\/div>\n
    <\/div>\n
    \"setup<\/div>\n
    \n
    Again select type of widget<\/strong> \u2192 system\/linux<\/strong> metrics \u2192 click Instanceid<\/strong><\/p>\n
    \n
    \n
    \n
    <\/div>\n
    \"setup<\/div>\n
    \n
    Filter out using our instance id <\/strong> and select all the three metrics of your instance and click create widget<\/strong><\/p>\n
    \n
    \n
    \n
    <\/div>\n
    \"setup<\/div>\n
    \n
    Enter the Gauge range 0 – 1000 <\/strong>and click create widget<\/strong><\/p>\n
    \n
    \n
    \n
    <\/div>\n
    \"setup<\/div>\n
    \n
    Now change the custom time to 1 minute<\/strong> , then only all the changes in our instance RAM & memory usage will be reflect in our dashboard and then \u2192 click save <\/strong><\/p>\n
    \n
    \n
    \n
    <\/div>\n
    \"setup<\/div>\n
    \n
    We have successfully done !! our cloud watch monitoring setup for Memory(RAM) & Disk space , <\/strong>here after we can easily monitor our EC2 instance’s memory and disk usages.<\/p>\n
    You can check if our cron is working or not , by using below command<\/p>\n
    cat \/var\/log\/cron<\/pre>\n
    \"setup<\/p>\n
    \"setup<\/p>\n
    yeah!! our cron is working properly .<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
    Monitoring the performance of your EC2 instances in AWS is crucial for ensuring that your applications run smoothly. One important aspect of monitoring is keeping an eye on the memory (RAM) and disk space usage of your instances. In this blog post, we will show you how to set up memory and disk space monitoring […]<\/p>\n","protected":false},"author":23,"featured_media":2685,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[2],"tags":[436],"yoast_head":"\nHow to setup Memory (RAM) and diskspace monitor for EC2 instance<\/title>\n<meta name=\"description\" content=\"Learn how to set up memory and disk space monitoring for your EC2 instances in AWS CloudWatch. 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