In addition to the AWS Elastic Kubernetes Service: a cluster creation automation, part 1 – CloudFormation and AWS Elastic Kubernetes Service: a cluster creation automation, part 2 – Ansible, eksctl posts – now I’d like to pass a Parameter as a List with multiply values to a CloudForamtion stack. The idea is to get all… Read More »
The first part – AWS Elastic Kubernetes Service: a cluster creation automation, part 1 – CloudFormation. To remind the whole idea is to create an automation process to create an EKS cluster: Ansible uses the cloudformation module to create an infrastructure by using an Outputs of the CloudFormation stack created – Ansible from a template will… Read More »
The next task with our Kubernetes cluster is to set up its monitoring with Prometheus. This task is complicated by the fact, that there is the whole bunch of resources needs to be monitored: from the infrastructure side – ЕС2 WokerNodes instances, their CPU, memory, network, disks, etc key services of Kubernetes itself – its… Read More »
The task is: create automation to roll out an AWS Elastic Kubernetes Service cluster from scratch. Will use: Ansible: to automate CloudFormation stack creation and to execute eksctl with necessary parameters CloudFormation with NestedStacks: to create an infrastructure – VPC, subnets, SecurityGroups, IAM-roles, etc eksctl: to create a cluster itself using resources created by CloudFormation… Read More »
In addition to the AWS: create an Elastic Container Registry and Jenkins deploy job post – the next part, where we will create a new Jenkins job to deploy a Docker Compose file to run our Docker image. Docker Compose file will be updated by an Ansible role called docker-deploy, which will set the desired… Read More »
We have a standard LEMP setup NGINX, PHP-FPM. Application – Yii-framework, deployed from Jenkins using Ansible role with the synchronize module on backend hosts in a /data/projects/prjectname/frontend/web, directory which is set as a root for an NGINX virtual host. The task is to have the ability to deploy the same application on the same backend… Read More »
The next post from the Redis replication series. Previous parts: Redis: replication, part 1 – an overview. Replication vs Sharding. Sentinel vs Cluster. Redis topology. Redis: replication, part 2 – Master-Slave replication, and Redis Sentinel Redis: replication, part 3 – redis-py and work with Redis Sentinel from Python The task now is to write an… Read More »
The task is to get a host’s IP during executing an Ansible task. Below – two examples of how this can be done. Example 1 – hostvars See the documentation here>>>. Code: – name: Test hosts list debug: msg: “{{ hostvars[inventory_hostname][‘ansible_default_ipv4’][‘address’] }}” Run it: [simterm] … TASK [test : Test hosts list] **** ok: [dev.backend-app1-internal.example.com]… Read More »
Have a self-written letsencrypt role (see the Prometheus: RTFM blog monitoring set up with Ansible – Grafana, Loki, and promtail post). Before running the Let’s Encrypt client to obtain a new certificate – need to check if NGINX is installed on a remote host. Let’s use the package_facts module: … – name: “Check if NGINX is… Read More »
After implementing the Loki system on my job’s project – I decided to add it for myself, so see my RTFM blog server’s logs. Also – want to add the node_exporter and alertmanager, to be notified about high disk usage. In this post, I’ll describe the Prometheus, node_exporter, Grafana, Loki, and promtail set up process… Read More »