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README.md

Role: node_remove

Remove Node Components and Deregister from Monitoring

Module NODE
Docs https://pigsty.io/docs/node/admin
Related Roles node, node_id, node_monitor

Overview

The node_remove role removes node components and deregisters nodes from monitoring infrastructure:

  • Deregister: Remove from Victoria Metrics, Nginx, Vector
  • Stop Services: node_exporter, keepalived_exporter, HAProxy, Vector
  • Remove DNS: VIP DNS records
  • Cleanup: Configuration files, profile scripts

Playbooks

Playbook Description
node-rm.yml Remove node components

File Structure

roles/node_remove/
├── defaults/
│   └── main.yml              # Default variables
├── meta/
│   └── main.yml              # Role dependencies
└── tasks/
    ├── main.yml              # Entry point
    └── nginx.yml             # Remove from Nginx

Tags

Tag Hierarchy

node_remove (full role)
│
├── node_deregister                # Deregister from monitoring
│   ├── rm_metrics                 # Remove from Victoria Metrics
│   ├── rm_dns                     # Remove VIP DNS records
│   └── rm_logs                    # Remove from Vector
│
├── haproxy_deregister             # Remove HAProxy from Nginx
│   └── rm_proxy                   # Remove Nginx upstream/location
│
├── vip                            # Stop keepalived service
│
├── haproxy                        # Stop HAProxy service
│
├── node_exporter                  # Stop node_exporter
│
├── vip_exporter                   # Stop keepalived_exporter
│
├── vector                         # Stop Vector service
│
└── profile                        # Remove shell profile scripts

Key Variables

Variable Default Description
nodename (auto) Node name (from node_id)
node_cluster nodes Node cluster name (for VIP DNS)
vip_enabled false Whether VIP is enabled
vip_address (none) VIP address to deregister
vector_data /data/vector Vector data directory

Removal Scope

The role removes:

Component What's Removed
Node Target /infra/targets/node/<ip>.yml
Docker Target /infra/targets/docker/<ip>.yml
Ping Target /infra/targets/ping/<ip>.yml
VIP Ping Target /infra/targets/ping/<vip>---<ip>.yml
VIP DNS /infra/hosts/<cluster>.vip
HAProxy Nginx /etc/nginx/conf.d/haproxy/upstream-<name>.conf
HAProxy Nginx /etc/nginx/conf.d/haproxy/location-<name>.conf
Vector Config /etc/vector/node.yaml
Vector Data /data/vector
Profile Scripts /etc/profile.d/node.sh, node.alias.sh

See Also