Updating software components to latest stable releases. Fix missing config, minor spelling/grammar/flow fixes.
The main purpose of this update is to make sure the guide still works with the newest version of all software. In running through the guide I found places to make bug fixes and minor improvements.master
Elson Rodriguez
Kelsey Hightower
parent
a9cb5f7ba5
commit
5a325c23d7
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@ -8,7 +8,7 @@ ca-csr.json
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ca-key.pem
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ca.csr
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ca.pem
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encryption-config.yaml
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/encryption-config.yaml
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kube-controller-manager-csr.json
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kube-controller-manager-key.pem
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kube-controller-manager.csr
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@ -48,4 +48,4 @@ service-account.csr
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service-account.pem
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service-account-csr.json
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*.swp
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.idea/
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.idea/
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@ -19,9 +19,9 @@ Kubernetes The Hard Way guides you through bootstrapping a basic Kubernetes clus
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Component versions:
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* [kubernetes](https://github.com/kubernetes/kubernetes) v1.28.x
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* [containerd](https://github.com/containerd/containerd) v1.7.x
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* [cni](https://github.com/containernetworking/cni) v1.3.x
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* [kubernetes](https://github.com/kubernetes/kubernetes) v1.31.x
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* [containerd](https://github.com/containerd/containerd) v2.0.x
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* [cni](https://github.com/containernetworking/cni) v1.6.x
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* [etcd](https://github.com/etcd-io/etcd) v3.4.x
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## Labs
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@ -0,0 +1,11 @@
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kind: EncryptionConfig
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apiVersion: v1
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resources:
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- resources:
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- secrets
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providers:
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- aescbc:
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keys:
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- name: key1
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secret: ${ENCRYPTION_KEY}
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- identity: {}
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@ -4,7 +4,7 @@ In this lab you will review the machine requirements necessary to follow this tu
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## Virtual or Physical Machines
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This tutorial requires four (4) virtual or physical ARM64 machines running Debian 12 (bookworm). The follow table list the four machines and thier CPU, memory, and storage requirements.
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This tutorial requires four (4) virtual or physical ARM64 machines running Debian 12 (bookworm). The following table list the four machines and thier CPU, memory, and storage requirements.
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| Name | Description | CPU | RAM | Storage |
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|---------|------------------------|-----|-------|---------|
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@ -22,7 +22,7 @@ uname -mov
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After running the `uname` command you should see the following output:
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```text
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#1 SMP Debian 6.1.55-1 (2023-09-29) aarch64 GNU/Linux
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#1 SMP Debian 6.1.115-1 (2024-11-01) aarch64 GNU/Linux
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```
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You maybe surprised to see `aarch64` here, but that is the official name for the Arm Architecture 64-bit instruction set. You will often see `arm64` used by Apple, and the maintainers of the Linux kernel, when referring to support for `aarch64`. This tutorial will use `arm64` consistently throughout to avoid confusion.
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@ -49,19 +49,13 @@ pwd
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In this section you will download the binaries for the various Kubernetes components. The binaries will be stored in the `downloads` directory on the `jumpbox`, which will reduce the amount of internet bandwidth required to complete this tutorial as we avoid downloading the binaries multiple times for each machine in our Kubernetes cluster.
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From the `kubernetes-the-hard-way` directory create a `downloads` directory using the `mkdir` command:
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```bash
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mkdir downloads
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```
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The binaries that will be downloaded are listed in the `downloads.txt` file, which you can review using the `cat` command:
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```bash
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cat downloads.txt
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```
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Download the binaries listed in the `downloads.txt` file using the `wget` command:
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Download the binaries listed in the `downloads.txt` file into a directory called `downloads` using the `wget` command:
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```bash
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wget -q --show-progress \
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@ -78,18 +72,18 @@ ls -loh downloads
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```
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```text
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total 584M
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-rw-r--r-- 1 root 41M May 9 13:35 cni-plugins-linux-arm64-v1.3.0.tgz
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-rw-r--r-- 1 root 34M Oct 26 15:21 containerd-1.7.8-linux-arm64.tar.gz
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-rw-r--r-- 1 root 22M Aug 14 00:19 crictl-v1.28.0-linux-arm.tar.gz
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-rw-r--r-- 1 root 15M Jul 11 02:30 etcd-v3.4.27-linux-arm64.tar.gz
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-rw-r--r-- 1 root 111M Oct 18 07:34 kube-apiserver
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-rw-r--r-- 1 root 107M Oct 18 07:34 kube-controller-manager
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-rw-r--r-- 1 root 51M Oct 18 07:34 kube-proxy
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-rw-r--r-- 1 root 52M Oct 18 07:34 kube-scheduler
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-rw-r--r-- 1 root 46M Oct 18 07:34 kubectl
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-rw-r--r-- 1 root 101M Oct 18 07:34 kubelet
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-rw-r--r-- 1 root 9.6M Aug 10 18:57 runc.arm64
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total 510M
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-rw-r--r-- 1 root 48M Oct 15 02:37 cni-plugins-linux-arm64-v1.6.0.tgz
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-rw-r--r-- 1 root 32M Nov 5 11:37 containerd-2.0.0-linux-arm64.tar.gz
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-rw-r--r-- 1 root 17M Aug 13 03:48 crictl-v1.31.1-linux-arm64.tar.gz
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-rw-r--r-- 1 root 16M Sep 11 11:28 etcd-v3.4.34-linux-arm64.tar.gz
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-rw-r--r-- 1 root 84M Oct 22 21:41 kube-apiserver
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-rw-r--r-- 1 root 79M Oct 22 21:41 kube-controller-manager
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-rw-r--r-- 1 root 53M Oct 22 21:41 kubectl
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-rw-r--r-- 1 root 72M Oct 22 21:41 kubelet
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-rw-r--r-- 1 root 61M Oct 22 21:41 kube-proxy
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-rw-r--r-- 1 root 60M Oct 22 21:41 kube-scheduler
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-rw-r--r-- 1 root 11M Nov 1 15:23 runc.arm64
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```
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### Install kubectl
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@ -112,8 +106,8 @@ kubectl version --client
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```
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```text
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Client Version: v1.28.3
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Kustomize Version: v5.0.4-0.20230601165947-6ce0bf390ce3
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Client Version: v1.31.2
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Kustomize Version: v5.4.2
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```
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At this point the `jumpbox` has been set up with all the command line tools and utilities necessary to complete the labs in this tutorial.
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@ -34,13 +34,13 @@ SSH will be used to configure the machines in the cluster. Verify that you have
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If `root` SSH access is enabled for each of your machines you can skip this section.
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By default, a new `debian` install disables SSH access for the `root` user. This is done for security reasons as the `root` user is a well known user on Linux systems, and if a weak password is used on a machine connected to the internet, well, let's just say it's only a matter of time before your machine belongs to someone else. As mention earlier, we are going to enable `root` access over SSH in order to streamline the steps in this tutorial. Security is a tradeoff, and in this case, we are optimizing for convenience. On each machine login via SSH using your user account, then switch to the `root` user using the `su` command:
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By default, a new `debian` install disables SSH access for the `root` user. This is done for security reasons as the `root` user has total administrative control of unix-like systems. If a weak password is used on a machine connected to the internet, well, let's just say it's only a matter of time before your machine belongs to someone else. As mentioned earlier, we are going to enable `root` access over SSH in order to streamline the steps in this tutorial. Security is a tradeoff, and in this case, we are optimizing for convenience. Log on to each machine via SSH using your user account, then switch to the `root` user using the `su` command:
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```bash
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su - root
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```
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Edit the `/etc/ssh/sshd_config` SSH daemon configuration file and the `PermitRootLogin` option to `yes`:
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Edit the `/etc/ssh/sshd_config` SSH daemon configuration file and set the `PermitRootLogin` option to `yes`:
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```bash
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sed -i \
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@ -97,7 +97,7 @@ aarch64 GNU/Linux
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## Hostnames
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In this section you will assign hostnames to the `server`, `node-0`, and `node-1` machines. The hostname will be used when executing commands from the `jumpbox` to each machine. The hostname also play a major role within the cluster. Instead of Kubernetes clients using an IP address to issue commands to the Kubernetes API server, those client will use the `server` hostname instead. Hostnames are also used by each worker machine, `node-0` and `node-1` when registering with a given Kubernetes cluster.
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In this section you will assign hostnames to the `server`, `node-0`, and `node-1` machines. The hostname will be used when executing commands from the `jumpbox` to each machine. The hostname also plays a major role within the cluster. Instead of Kubernetes clients using an IP address to issue commands to the Kubernetes API server, those clients will use the `server` hostname instead. Hostnames are also used by each worker machine, `node-0` and `node-1` when registering with a given Kubernetes cluster.
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To configure the hostname for each machine, run the following commands on the `jumpbox`.
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@ -125,9 +125,9 @@ node-0.kubernetes.local
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node-1.kubernetes.local
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```
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## DNS
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## Host Lookup Table
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In this section you will generate a DNS `hosts` file which will be appended to `jumpbox` local `/etc/hosts` file and to the `/etc/hosts` file of all three machines used for this tutorial. This will allow each machine to be reachable using a hostname such as `server`, `node-0`, or `node-1`.
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In this section you will generate a `hosts` file which will be appended to `/etc/hosts` file on `jumpbox` and to the `/etc/hosts` files on all three cluster members used for this tutorial. This will allow each machine to be reachable using a hostname such as `server`, `node-0`, or `node-1`.
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Create a new `hosts` file and add a header to identify the machines being added:
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@ -136,7 +136,7 @@ echo "" > hosts
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echo "# Kubernetes The Hard Way" >> hosts
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```
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Generate a DNS entry for each machine in the `machines.txt` file and append it to the `hosts` file:
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Generate a host entry for each machine in the `machines.txt` file and append it to the `hosts` file:
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```bash
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while read IP FQDN HOST SUBNET; do
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@ -145,7 +145,7 @@ while read IP FQDN HOST SUBNET; do
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done < machines.txt
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```
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Review the DNS entries in the `hosts` file:
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Review the host entries in the `hosts` file:
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```bash
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cat hosts
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@ -159,7 +159,7 @@ XXX.XXX.XXX.XXX node-0.kubernetes.local node-0
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XXX.XXX.XXX.XXX node-1.kubernetes.local node-1
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```
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## Adding DNS Entries To A Local Machine
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## Adding `/etc/hosts` Entries To A Local Machine
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In this section you will append the DNS entries from the `hosts` file to the local `/etc/hosts` file on your `jumpbox` machine.
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@ -206,9 +206,9 @@ node-0 aarch64 GNU/Linux
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node-1 aarch64 GNU/Linux
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```
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## Adding DNS Entries To The Remote Machines
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## Adding `/etc/hosts` Entries To The Remote Machines
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In this section you will append the DNS entries from `hosts` to `/etc/hosts` on each machine listed in the `machines.txt` text file.
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In this section you will append the host entries from `hosts` to `/etc/hosts` on each machine listed in the `machines.txt` text file.
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Copy the `hosts` file to each machine and append the contents to `/etc/hosts`:
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@ -220,6 +220,6 @@ while read IP FQDN HOST SUBNET; do
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done < machines.txt
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```
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At this point hostnames can be used when connecting to machines from your `jumpbox` machine, or any of the three machines in the Kubernetes cluster. Instead of using IP addresess you can now connect to machines using a hostname such as `server`, `node-0`, or `node-1`.
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At this point hostnames can be used when connecting to machines from your `jumpbox` machine, or any of the three machines in the Kubernetes cluster. Instead of using IP addresses you can now connect to machines using a hostname such as `server`, `node-0`, or `node-1`.
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Next: [Provisioning a CA and Generating TLS Certificates](04-certificate-authority.md)
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@ -14,7 +14,7 @@ cat ca.conf
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You don't need to understand everything in the `ca.conf` file to complete this tutorial, but you should consider it a starting point for learning `openssl` and the configuration that goes into managing certificates at a high level.
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Every certificate authority starts with a private key and root certificate. In this section we are going to create a self-signed certificate authority, and while that's all we need for this tutorial, this shouldn't be considered something you would do in a real-world production level environment.
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Every certificate authority starts with a private key and root certificate. In this section we are going to create a self-signed certificate authority, and while that's all we need for this tutorial, this shouldn't be considered something you would do in a real-world production environment.
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Generate the CA configuration file, certificate, and private key:
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@ -75,7 +75,7 @@ ls -1 *.crt *.key *.csr
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## Distribute the Client and Server Certificates
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In this section you will copy the various certificates to each machine under a directory that each Kubernetes components will search for the certificate pair. In a real-world environment these certificates should be treated like a set of sensitive secrets as they are often used as credentials by the Kubernetes components to authenticate to each other.
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In this section you will copy the various certificates to every machine at a path where each Kubernetes component will search for its certificate pair. In a real-world environment these certificates should be treated like a set of sensitive secrets as they are used as credentials by the Kubernetes components to authenticate to each other.
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Copy the appropriate certificates and private keys to the `node-0` and `node-1` machines:
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@ -1,6 +1,6 @@
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# Generating Kubernetes Configuration Files for Authentication
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In this lab you will generate [Kubernetes configuration files](https://kubernetes.io/docs/concepts/configuration/organize-cluster-access-kubeconfig/), also known as kubeconfigs, which enable Kubernetes clients to locate and authenticate to the Kubernetes API Servers.
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In this lab you will generate [Kubernetes client configuration files](https://kubernetes.io/docs/concepts/configuration/organize-cluster-access-kubeconfig/), typically called kubeconfigs, which configure Kubernetes clients to connect and authenticate to Kubernetes API Servers.
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## Client Authentication Configs
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@ -12,7 +12,7 @@ When generating kubeconfig files for Kubelets the client certificate matching th
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> The following commands must be run in the same directory used to generate the SSL certificates during the [Generating TLS Certificates](04-certificate-authority.md) lab.
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Generate a kubeconfig file the node-0 worker node:
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Generate a kubeconfig file for the node-0 worker node:
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```bash
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for host in node-0 node-1; do
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@ -8,7 +8,7 @@ Copy `etcd` binaries and systemd unit files to the `server` instance:
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```bash
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scp \
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downloads/etcd-v3.4.27-linux-arm64.tar.gz \
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downloads/etcd-v3.4.34-linux-arm64.tar.gz \
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units/etcd.service \
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root@server:~/
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```
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@ -27,8 +27,8 @@ Extract and install the `etcd` server and the `etcdctl` command line utility:
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```bash
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{
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tar -xvf etcd-v3.4.27-linux-arm64.tar.gz
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mv etcd-v3.4.27-linux-arm64/etcd* /usr/local/bin/
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tar -xvf etcd-v3.4.34-linux-arm64.tar.gz
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mv etcd-v3.4.34-linux-arm64/etcd* /usr/local/bin/
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}
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```
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@ -1,10 +1,10 @@
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# Bootstrapping the Kubernetes Control Plane
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In this lab you will bootstrap the Kubernetes control plane. The following components will be installed the controller machine: Kubernetes API Server, Scheduler, and Controller Manager.
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In this lab you will bootstrap the Kubernetes control plane. The following components will be installed on the controller machine: Kubernetes API Server, Scheduler, and Controller Manager.
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## Prerequisites
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Copy Kubernetes binaries and systemd unit files to the `server` instance:
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Connect to the `jumpbox` and copy Kubernetes binaries and systemd unit files to the `server` instance:
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```bash
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scp \
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@ -166,12 +166,12 @@ curl -k --cacert ca.crt https://server.kubernetes.local:6443/version
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```text
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{
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"major": "1",
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"minor": "28",
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"gitVersion": "v1.28.3",
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"gitCommit": "a8a1abc25cad87333840cd7d54be2efaf31a3177",
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"minor": "31",
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"gitVersion": "v1.31.2",
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"gitCommit": "5864a4677267e6adeae276ad85882a8714d69d9d",
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"gitTreeState": "clean",
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"buildDate": "2023-10-18T11:33:18Z",
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"goVersion": "go1.20.10",
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"buildDate": "2024-10-22T20:28:14Z",
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"goVersion": "go1.22.8",
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"compiler": "gc",
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"platform": "linux/arm64"
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}
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@ -24,9 +24,9 @@ done
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for host in node-0 node-1; do
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scp \
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downloads/runc.arm64 \
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downloads/crictl-v1.28.0-linux-arm.tar.gz \
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downloads/cni-plugins-linux-arm64-v1.3.0.tgz \
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downloads/containerd-1.7.8-linux-arm64.tar.gz \
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downloads/crictl-v1.31.1-linux-arm64.tar.gz \
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downloads/cni-plugins-linux-arm64-v1.6.0.tgz \
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downloads/containerd-2.0.0-linux-arm64.tar.gz \
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downloads/kubectl \
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downloads/kubelet \
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downloads/kube-proxy \
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@ -95,9 +95,9 @@ Install the worker binaries:
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```bash
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{
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mkdir -p containerd
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tar -xvf crictl-v1.28.0-linux-arm.tar.gz
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tar -xvf containerd-1.7.8-linux-arm64.tar.gz -C containerd
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tar -xvf cni-plugins-linux-arm64-v1.3.0.tgz -C /opt/cni/bin/
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tar -xvf crictl-v1.31.1-linux-arm64.tar.gz
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tar -xvf containerd-2.0.0-linux-arm64.tar.gz -C containerd
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tar -xvf cni-plugins-linux-arm64-v1.6.0.tgz -C /opt/cni/bin/
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mv runc.arm64 runc
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chmod +x crictl kubectl kube-proxy kubelet runc
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mv crictl kubectl kube-proxy kubelet runc /usr/local/bin/
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@ -169,8 +169,8 @@ ssh root@server \
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```
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NAME STATUS ROLES AGE VERSION
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node-0 Ready <none> 1m v1.28.3
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node-1 Ready <none> 10s v1.28.3
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node-0 Ready <none> 1m v1.31.2
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node-1 Ready <none> 10s v1.31.2
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```
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Next: [Configuring kubectl for Remote Access](10-configuring-kubectl.md)
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|
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@ -18,12 +18,12 @@ curl -k --cacert ca.crt \
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```text
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{
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"major": "1",
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"minor": "28",
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"gitVersion": "v1.28.3",
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"gitCommit": "a8a1abc25cad87333840cd7d54be2efaf31a3177",
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"minor": "31",
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"gitVersion": "v1.31.2",
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"gitCommit": "5864a4677267e6adeae276ad85882a8714d69d9d",
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"gitTreeState": "clean",
|
||||
"buildDate": "2023-10-18T11:33:18Z",
|
||||
"goVersion": "go1.20.10",
|
||||
"buildDate": "2024-10-22T20:28:14Z",
|
||||
"goVersion": "go1.22.8",
|
||||
"compiler": "gc",
|
||||
"platform": "linux/arm64"
|
||||
}
|
||||
|
|
@ -61,9 +61,9 @@ kubectl version
|
|||
```
|
||||
|
||||
```text
|
||||
Client Version: v1.28.3
|
||||
Kustomize Version: v5.0.4-0.20230601165947-6ce0bf390ce3
|
||||
Server Version: v1.28.3
|
||||
Client Version: v1.31.2
|
||||
Kustomize Version: v5.4.2
|
||||
Server Version: v1.31.2
|
||||
```
|
||||
|
||||
List the nodes in the remote Kubernetes cluster:
|
||||
|
|
@ -74,8 +74,8 @@ kubectl get nodes
|
|||
|
||||
```
|
||||
NAME STATUS ROLES AGE VERSION
|
||||
node-0 Ready <none> 30m v1.28.3
|
||||
node-1 Ready <none> 35m v1.28.3
|
||||
node-0 Ready <none> 30m v1.31.2
|
||||
node-1 Ready <none> 35m v1.31.2
|
||||
```
|
||||
|
||||
Next: [Provisioning Pod Network Routes](11-pod-network-routes.md)
|
||||
|
|
|
|||
|
|
@ -100,15 +100,14 @@ curl --head http://127.0.0.1:8080
|
|||
|
||||
```text
|
||||
HTTP/1.1 200 OK
|
||||
Server: nginx/1.25.3
|
||||
Date: Sun, 29 Oct 2023 01:44:32 GMT
|
||||
Server: nginx/1.27.2
|
||||
Date: Thu, 14 Nov 2024 00:16:32 GMT
|
||||
Content-Type: text/html
|
||||
Content-Length: 615
|
||||
Last-Modified: Tue, 24 Oct 2023 13:46:47 GMT
|
||||
Last-Modified: Wed, 02 Oct 2024 15:13:19 GMT
|
||||
Connection: keep-alive
|
||||
ETag: "6537cac7-267"
|
||||
ETag: "66fd630f-267"
|
||||
Accept-Ranges: bytes
|
||||
|
||||
```
|
||||
|
||||
Switch back to the previous terminal and stop the port forwarding to the `nginx` pod:
|
||||
|
|
@ -132,7 +131,7 @@ kubectl logs $POD_NAME
|
|||
|
||||
```text
|
||||
...
|
||||
127.0.0.1 - - [01/Nov/2023:06:10:17 +0000] "HEAD / HTTP/1.1" 200 0 "-" "curl/7.88.1" "-"
|
||||
127.0.0.1 - - [14/Nov/2024:00:16:32 +0000] "HEAD / HTTP/1.1" 200 0 "-" "curl/7.88.1" "-"
|
||||
```
|
||||
|
||||
### Exec
|
||||
|
|
@ -146,7 +145,7 @@ kubectl exec -ti $POD_NAME -- nginx -v
|
|||
```
|
||||
|
||||
```text
|
||||
nginx version: nginx/1.25.3
|
||||
nginx version: nginx/1.27.2
|
||||
```
|
||||
|
||||
## Services
|
||||
|
|
@ -169,6 +168,8 @@ NODE_PORT=$(kubectl get svc nginx \
|
|||
--output=jsonpath='{range .spec.ports[0]}{.nodePort}')
|
||||
```
|
||||
|
||||
|
||||
|
||||
Make an HTTP request using the IP address and the `nginx` node port:
|
||||
|
||||
```bash
|
||||
|
|
|
|||
|
|
@ -4,4 +4,8 @@ In this lab you will delete the compute resources created during this tutorial.
|
|||
|
||||
## Compute Instances
|
||||
|
||||
Delete the controller and worker compute instances.
|
||||
Previous versions of this guide made use of GCP resources for various aspects of compute and networking. The current version is agnostic, and all configuration is performed on the `jumpbox`, `server`, or nodes.
|
||||
|
||||
Clean up is as simple as deleting all virtual machines you created for this exercise.
|
||||
|
||||
Next: [Start Over](../README.md)
|
||||
|
|
|
|||
|
|
@ -1,11 +1,11 @@
|
|||
https://storage.googleapis.com/kubernetes-release/release/v1.28.3/bin/linux/arm64/kubectl
|
||||
https://storage.googleapis.com/kubernetes-release/release/v1.28.3/bin/linux/arm64/kube-apiserver
|
||||
https://storage.googleapis.com/kubernetes-release/release/v1.28.3/bin/linux/arm64/kube-controller-manager
|
||||
https://storage.googleapis.com/kubernetes-release/release/v1.28.3/bin/linux/arm64/kube-scheduler
|
||||
https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.28.0/crictl-v1.28.0-linux-arm.tar.gz
|
||||
https://github.com/opencontainers/runc/releases/download/v1.1.9/runc.arm64
|
||||
https://github.com/containernetworking/plugins/releases/download/v1.3.0/cni-plugins-linux-arm64-v1.3.0.tgz
|
||||
https://github.com/containerd/containerd/releases/download/v1.7.8/containerd-1.7.8-linux-arm64.tar.gz
|
||||
https://storage.googleapis.com/kubernetes-release/release/v1.28.3/bin/linux/arm64/kube-proxy
|
||||
https://storage.googleapis.com/kubernetes-release/release/v1.28.3/bin/linux/arm64/kubelet
|
||||
https://github.com/etcd-io/etcd/releases/download/v3.4.27/etcd-v3.4.27-linux-arm64.tar.gz
|
||||
https://dl.k8s.io/v1.31.2/bin/linux/arm64/kubectl
|
||||
https://dl.k8s.io/v1.31.2/bin/linux/arm64/kube-apiserver
|
||||
https://dl.k8s.io/v1.31.2/bin/linux/arm64/kube-controller-manager
|
||||
https://dl.k8s.io/v1.31.2/bin/linux/arm64/kube-scheduler
|
||||
https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.31.1/crictl-v1.31.1-linux-arm64.tar.gz
|
||||
https://github.com/opencontainers/runc/releases/download/v1.2.1/runc.arm64
|
||||
https://github.com/containernetworking/plugins/releases/download/v1.6.0/cni-plugins-linux-arm64-v1.6.0.tgz
|
||||
https://github.com/containerd/containerd/releases/download/v2.0.0/containerd-2.0.0-linux-arm64.tar.gz
|
||||
https://dl.k8s.io/v1.31.2/bin/linux/arm64/kube-proxy
|
||||
https://dl.k8s.io/v1.31.2/bin/linux/arm64/kubelet
|
||||
https://github.com/etcd-io/etcd/releases/download/v3.4.34/etcd-v3.4.34-linux-arm64.tar.gz
|
||||
|
|
|
|||
Loading…
Reference in New Issue