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1405fadf1a
Squashed commit of the following:
commit 257867f196376df55fa0f57edbdf33967b1da04e
Author: Khue Doan <mail@khuedoan.com>
Date: Sun Sep 18 16:45:42 2022 +0700
refactor(docs): apply the Diátaxis framework
73 lines
1.9 KiB
Markdown
73 lines
1.9 KiB
Markdown
# Add or remove nodes
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Or how to scale vertically. To replace the same node with a clean OS, remove it and add it again.
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## Add new nodes
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!!! tip
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You can add multiple nodes at the same time
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Add its details to the inventory **at the end of the group** (masters or workers):
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```diff title="metal/inventories/prod.yml"
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diff --git a/metal/inventories/prod.yml b/metal/inventories/prod.yml
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index 7f6474a..1bb2cbc 100644
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--- a/metal/inventories/prod.yml
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+++ b/metal/inventories/prod.yml
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@@ -8,3 +8,4 @@ metal:
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workers:
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hosts:
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metal3: {ansible_host: 192.168.1.113, mac: '00:23:24:d1:f5:69', disk: sda, network_interface: eno1}
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+ metal4: {ansible_host: 192.168.1.114, mac: '00:11:22:33:44:55', disk: sda, network_interface: eno1}
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```
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Install the OS and join the cluster:
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```
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make metal
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```
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That's it!
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## Remove a node
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!!! danger
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It is recommended to remove nodes one at a time
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Remove it from the inventory:
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```diff title="metal/inventories/prod.yml"
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diff --git a/metal/inventories/prod.yml b/metal/inventories/prod.yml
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index 7f6474a..d12b50a 100644
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--- a/metal/inventories/prod.yml
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+++ b/metal/inventories/prod.yml
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@@ -4,7 +4,6 @@ metal:
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hosts:
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metal0: {ansible_host: 192.168.1.110, mac: '00:23:24:d1:f3:f0', disk: sda, network_interface: eno1}
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metal1: {ansible_host: 192.168.1.111, mac: '00:23:24:d1:f4:d6', disk: sda, network_interface: eno1}
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- metal2: {ansible_host: 192.168.1.112, mac: '00:23:24:e7:04:60', disk: sda, network_interface: eno1}
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workers:
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hosts:
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metal3: {ansible_host: 192.168.1.113, mac: '00:23:24:d1:f5:69', disk: sda, network_interface: eno1}
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```
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Drain the node:
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```sh
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kubectl drain ${NODE_NAME} --delete-emptydir-data --ignore-daemonsets --force
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```
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Remove the node from the cluster
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```sh
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kubectl delete node ${NODE_NAME}
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```
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Shutdown the node:
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```
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ssh root@${NODE_IP} poweroff
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```
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