A Passionate Techie

Kubernetes is a  cluster  and  orchestration  engine for docker containers. In other words Kubernetes is  an open source software or tool which is used to orchestrate and manage docker containers in cluster environment. Kubernetes is also known as k8s and it was developed by Google and donated to “Cloud Native Computing foundation” In Kubernetes setup we have one master node and multiple nodes. Cluster nodes is known as worker node or Minion. From the master node we manage the cluster and its nodes using ‘ kubeadm ‘ and ‘ kubectl ‘  command. Kubernetes can be installed and deployed using following methods: Minikube ( It is a single node kubernetes cluster) Kops ( Multi node kubernetes setup into AWS ) Kubeadm ( Multi Node Cluster in our own premises) In this article we will install latest version of Kubernetes 1.7 on CentOS 7 / RHEL 7 with kubeadm utility. In my setup I am taking three CentOS 7 servers with minimal installation. One server will acts master node and rest two serve...

The function “state.apply” is running as PID Restart salt-minion with command:  service salt-minion restart No matching sls found for ‘init’ in env ‘base’ Add top.sls file in the directory where your main sls file is present. Create the file as follows: base: 'web*': - apache If the sls is present in a subdirectory elasticsearch/init.sls then write the top.sls as: base: '*': - elasticsearch.init How to execute saltstack-formulas create file  /srv/pillar/top.sls  with content: base : ' * ' : - salt create file  /srv/pillar/salt.sls  with content: salt : master : worker_threads : 2 fileserver_backend : - roots - git gitfs_remotes : - git://github.com/saltstack-formulas/epel-formula.git - git://github.com/saltstack-formulas/git-formula.git - git://github.com/saltstack-formulas/nano-formula.git - git://github.com/saltstack-formulas/rabbitmq-formula.git - git://github.co...

Execute the following commands in git bash:  git remote add origin <url> git remote set-url –push origin <url> git push -u origin master

Add all the configurations in pillar.sls into the target file: 1 2 3 4 5 6 7 8 9 10 11 {%- if salt['pillar.get']('elasticsearch:config') %} /etc/elasticsearch/elasticsearch.yml:    file.managed:      - source: salt://elasticsearch/files/elasticsearch.yml      - user: root      - template: jinja      - require:        - sls: elasticsearch.pkg      - context:          config: {{ salt['pillar.get']('elasticsearch:config', '{}') }} {%- endif %} 2. Create multiple directories if it does not exists 1 2 3 4 5 6 7 8 9 10 11 12 {% for dir in (data_dir, log_dir) %} {% if dir %} {{ dir }}:    file.directory:      - user: elasticsearch      - group: elasticsearch  ...