DevOps Classroomnotes 26/Mar/2022

Continuing Tomcat Installation with Ansible

  • For the link for installing tomcat Refer Here
  • Refer Here for the list of ansible modules
  • Extract the tar file
sudo tar -xf /tmp/apache-tomcat-${VERSION}.tar.gz -C /opt/tomcat/
  • Refer Here for the changes done
  • Since the tar file is present on the ansible node, we have to remote_src Refer Here for the changes
  • Create a link to the new folder
sudo ln -s /opt/tomcat/apache-tomcat-${VERSION} /opt/tomcat/latest

Preview
* Now change the folder permissions

sudo chown -R tomcat: /opt/tomcat

Preview
Preview
* Change the permissions of all executables

sudo sh -c 'chmod +x /opt/tomcat/latest/bin/*.sh'
  • Written the ansible module to find all the shell files and print the files found. Refer Here
  • The result which we got is
{
        "changed": false,
        "examined": 27,
        "failed": false,
        "files": [
            {
                "atime": 1648301913.4882483,
                "ctime": 1648301913.5282478,
                "dev": 51713,
                "gid": 1002,
                "gr_name": "tomcat",
                "inode": 542158,
                "isblk": false,
                "ischr": false,
                "isdir": false,
                "isfifo": false,
                "isgid": false,
                "islnk": false,
                "isreg": true,
                "issock": false,
                "isuid": false,
                "mode": "0750",
                "mtime": 1646837545.0,
                "nlink": 1,
                "path": "/opt/tomcat/latest/bin/tool-wrapper.sh",
                "pw_name": "tomcat",
                "rgrp": true,
                "roth": false,
                "rusr": true,
                "size": 5540,
                "uid": 1002,
                "wgrp": false,
                "woth": false,
                "wusr": true,
                "xgrp": true,
                "xoth": false,
                "xusr": true
            },
            {
                "atime": 1648301913.4882483,
                "ctime": 1648301913.5282478,
                "dev": 51713,
                "gid": 1002,
                "gr_name": "tomcat",
                "inode": 542156,
                "isblk": false,
                "ischr": false,
                "isdir": false,
                "isfifo": false,
                "isgid": false,
                "islnk": false,
                "isreg": true,
                "issock": false,
                "isuid": false,
                "mode": "0750",
                "mtime": 1646837545.0,
                "nlink": 1,
                "path": "/opt/tomcat/latest/bin/shutdown.sh",
                "pw_name": "tomcat",
                "rgrp": true,
                "roth": false,
                "rusr": true,
                "size": 1902,
                "uid": 1002,
                "wgrp": false,
                "woth": false,
                "wusr": true,
                "xgrp": true,
                "xoth": false,
                "xusr": true
            },
            {
                "atime": 1648301913.4882483,
                "ctime": 1648301913.5282478,
                "dev": 51713,
                "gid": 1002,
                "gr_name": "tomcat",
                "inode": 542157,
                "isblk": false,
                "ischr": false,
                "isdir": false,
                "isfifo": false,
                "isgid": false,
                "islnk": false,
                "isreg": true,
                "issock": false,
                "isuid": false,
                "mode": "0750",
                "mtime": 1646837545.0,
                "nlink": 1,
                "path": "/opt/tomcat/latest/bin/startup.sh",
                "pw_name": "tomcat",
                "rgrp": true,
                "roth": false,
                "rusr": true,
                "size": 1904,
                "uid": 1002,
                "wgrp": false,
                "woth": false,
                "wusr": true,
                "xgrp": true,
                "xoth": false,
                "xusr": true
            },
            {
                "atime": 1648301913.4882483,
                "ctime": 1648301913.5282478,
                "dev": 51713,
                "gid": 1002,
                "gr_name": "tomcat",
                "inode": 542150,
                "isblk": false,
                "ischr": false,
                "isdir": false,
                "isfifo": false,
                "isgid": false,
                "islnk": false,
                "isreg": true,
                "issock": false,
                "isuid": false,
                "mode": "0750",
                "mtime": 1646837545.0,
                "nlink": 1,
                "path": "/opt/tomcat/latest/bin/ciphers.sh",
                "pw_name": "tomcat",
                "rgrp": true,
                "roth": false,
                "rusr": true,
                "size": 1997,
                "uid": 1002,
                "wgrp": false,
                "woth": false,
                "wusr": true,
                "xgrp": true,
                "xoth": false,
                "xusr": true
            },
            {
                "atime": 1648301913.4882483,
                "ctime": 1648301913.5282478,
                "dev": 51713,
                "gid": 1002,
                "gr_name": "tomcat",
                "inode": 542152,
                "isblk": false,
                "ischr": false,
                "isdir": false,
                "isfifo": false,
                "isgid": false,
                "islnk": false,
                "isreg": true,
                "issock": false,
                "isuid": false,
                "mode": "0750",
                "mtime": 1646837545.0,
                "nlink": 1,
                "path": "/opt/tomcat/latest/bin/daemon.sh",
                "pw_name": "tomcat",
                "rgrp": true,
                "roth": false,
                "rusr": true,
                "size": 9100,
                "uid": 1002,
                "wgrp": false,
                "woth": false,
                "wusr": true,
                "xgrp": true,
                "xoth": false,
                "xusr": true
            },
            {
                "atime": 1648301913.4882483,
                "ctime": 1648301913.5282478,
                "dev": 51713,
                "gid": 1002,
                "gr_name": "tomcat",
                "inode": 542151,
                "isblk": false,
                "ischr": false,
                "isdir": false,
                "isfifo": false,
                "isgid": false,
                "islnk": false,
                "isreg": true,
                "issock": false,
                "isuid": false,
                "mode": "0750",
                "mtime": 1646837545.0,
                "nlink": 1,
                "path": "/opt/tomcat/latest/bin/configtest.sh",
                "pw_name": "tomcat",
                "rgrp": true,
                "roth": false,
                "rusr": true,
                "size": 1922,
                "uid": 1002,
                "wgrp": false,
                "woth": false,
                "wusr": true,
                "xgrp": true,
                "xoth": false,
                "xusr": true
            },
            {
                "atime": 1648301913.4882483,
                "ctime": 1648301913.5282478,
                "dev": 51713,
                "gid": 1002,
                "gr_name": "tomcat",
                "inode": 542159,
                "isblk": false,
                "ischr": false,
                "isdir": false,
                "isfifo": false,
                "isgid": false,
                "islnk": false,
                "isreg": true,
                "issock": false,
                "isuid": false,
                "mode": "0750",
                "mtime": 1646837545.0,
                "nlink": 1,
                "path": "/opt/tomcat/latest/bin/version.sh",
                "pw_name": "tomcat",
                "rgrp": true,
                "roth": false,
                "rusr": true,
                "size": 1908,
                "uid": 1002,
                "wgrp": false,
                "woth": false,
                "wusr": true,
                "xgrp": true,
                "xoth": false,
                "xusr": true
            },
            {
                "atime": 1648301913.4882483,
                "ctime": 1648301913.5282478,
                "dev": 51713,
                "gid": 1002,
                "gr_name": "tomcat",
                "inode": 542149,
                "isblk": false,
                "ischr": false,
                "isdir": false,
                "isfifo": false,
                "isgid": false,
                "islnk": false,
                "isreg": true,
                "issock": false,
                "isuid": false,
                "mode": "0750",
                "mtime": 1646837545.0,
                "nlink": 1,
                "path": "/opt/tomcat/latest/bin/catalina.sh",
                "pw_name": "tomcat",
                "rgrp": true,
                "roth": false,
                "rusr": true,
                "size": 25294,
                "uid": 1002,
                "wgrp": false,
                "woth": false,
                "wusr": true,
                "xgrp": true,
                "xoth": false,
                "xusr": true
            },
            {
                "atime": 1648301913.4882483,
                "ctime": 1648301913.5282478,
                "dev": 51713,
                "gid": 1002,
                "gr_name": "tomcat",
                "inode": 542153,
                "isblk": false,
                "ischr": false,
                "isdir": false,
                "isfifo": false,
                "isgid": false,
                "islnk": false,
                "isreg": true,
                "issock": false,
                "isuid": false,
                "mode": "0750",
                "mtime": 1646837545.0,
                "nlink": 1,
                "path": "/opt/tomcat/latest/bin/digest.sh",
                "pw_name": "tomcat",
                "rgrp": true,
                "roth": false,
                "rusr": true,
                "size": 1965,
                "uid": 1002,
                "wgrp": false,
                "woth": false,
                "wusr": true,
                "xgrp": true,
                "xoth": false,
                "xusr": true
            },
            {
                "atime": 1648301913.4882483,
                "ctime": 1648301913.5282478,
                "dev": 51713,
                "gid": 1002,
                "gr_name": "tomcat",
                "inode": 542154,
                "isblk": false,
                "ischr": false,
                "isdir": false,
                "isfifo": false,
                "isgid": false,
                "islnk": false,
                "isreg": true,
                "issock": false,
                "isuid": false,
                "mode": "0750",
                "mtime": 1646837545.0,
                "nlink": 1,
                "path": "/opt/tomcat/latest/bin/makebase.sh",
                "pw_name": "tomcat",
                "rgrp": true,
                "roth": false,
                "rusr": true,
                "size": 3382,
                "uid": 1002,
                "wgrp": false,
                "woth": false,
                "wusr": true,
                "xgrp": true,
                "xoth": false,
                "xusr": true
            },
            {
                "atime": 1648301913.4882483,
                "ctime": 1648301913.5282478,
                "dev": 51713,
                "gid": 1002,
                "gr_name": "tomcat",
                "inode": 542155,
                "isblk": false,
                "ischr": false,
                "isdir": false,
                "isfifo": false,
                "isgid": false,
                "islnk": false,
                "isreg": true,
                "issock": false,
                "isuid": false,
                "mode": "0750",
                "mtime": 1646837545.0,
                "nlink": 1,
                "path": "/opt/tomcat/latest/bin/setclasspath.sh",
                "pw_name": "tomcat",
                "rgrp": true,
                "roth": false,
                "rusr": true,
                "size": 3708,
                "uid": 1002,
                "wgrp": false,
                "woth": false,
                "wusr": true,
                "xgrp": true,
                "xoth": false,
                "xusr": true
            }
        ]
}
  • We need to iterate this list of files now and for every file we need to add execute permission
  • Loops in Ansible Refer Here
  • Lets run some examples
---
- name: loops demo
  hosts: all
  gather_facts: no
  tasks:
    - debug: 
        msg: "{{ item }}"
      loop:
        - Ansible
        - Kubernetes

Preview
* Refer Here for the changes done
* Now execute the playbook and verify the permissions of the shell files
Preview
* Now we need to create a SystemD unit file Refer Here

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