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Now let's do a little study for the last 3 points of the list. Get the Let's start with MAC address and product_uuid of the cluster nodes, making sure they are different from each other, using the commands
| Code Block |
|---|
| language | bash |
|---|
| title | MAC address and product_uuid |
|---|
| collapse | true |
|---|
|
# Equivalent commands to get MAC address (type format similar to "fa:16:3d:c9:ac:83")
$ ip link
$ ifconfig -a
# Command to get the product_uuid (type format similar to "92DD146C-F404-4253-J518-49602Z7C1B8F")
$ sudo cat /sys/class/dmi/id/product_uuid |
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| Code Block |
|---|
| language | bash |
|---|
| title | br_netfilter module |
|---|
| collapse | true |
|---|
|
# Verify that the br_netfilter module is present (you should get an output like the following)
$ lsmod | grep br_netfilter
br_netfilter 22256 0
bridge 151336 1 br_netfilter
# If not present, use
$ sudo modprobe br_netfilter |
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| Code Block |
|---|
| language | bash |
|---|
| title | iptables |
|---|
| collapse | true |
|---|
|
$ cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF |
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| Code Block |
|---|
| language | bash |
|---|
| title | Swap |
|---|
| collapse | true |
|---|
|
$ free -h
total used free shared buff/cache available
Mem: 3.7G 1.2G 223M 26M 2.3G 2.2G
Swap: 0B 0B 0B |
...