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Working k8s cluster

This commit is contained in:
Moritz Graf 2020-04-04 12:18:18 +02:00
parent 36be4c2d3c
commit f48650456b
10 changed files with 114 additions and 39 deletions
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15
README.md
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@ -7,12 +7,19 @@ Infrapuzzle is the newly restructured way of implementing my private infrastruct
* host directory storage
* Ingress via host network
## Bootstrap
## terraform
Bootstrap is documented in the subfolders [REAMDE](./bootstrap/README.md)
[Documentation in subfolder](./terraform/README.md). It takes care of setting DNS records on OVH nameservers.
## bootstrap
[Documentation in subfolder](./bootstrap/README.md). It takes care of setting up the k8s cluster itself, including a vagrant dev environment.
## k8s
[Documentation in subfolder](./k8s/README.md). The services themselfes.
## Links used
* [ingress via host network](https://kubernetes.github.io/ingress-nginx/deploy/baremetal/#via-the-host-network)
* [Install K8s with Kubespray](https://kubernetes.io/docs/setup/production-environment/tools/kubespray/)
*
* [Install K8s with Kubespray](https://kubernetes.io/docs/setup/production-environment/tools/kubespray/)

1
bootstrap/README.md
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@ -4,6 +4,7 @@ The following lines document hwo to initalize a fresh cluster. On a real cluster
```sh
git clone https://github.com/kubernetes-sigs/kubespray.git
#git clone git@github.com:iptizer/kubespray.git
./init_kubespray.sh
cd kubespray
vagrant up

0
bootstrap/dev.inventory → bootstrap/dev.ini
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45
bootstrap/init.sh Executable file
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@ -0,0 +1,45 @@
#!/bin/sh
echo "######################################################################################"
echo "## Reinit repository"
rm -rf kubespray
git clone https://github.com/kubernetes-sigs/kubespray.git
echo "######################################################################################"
echo "## Activating python3 venv"
VENVDIR=venv
virtualenv --python=/usr/bin/python3.7 $VENVDIR
source $VENVDIR/bin/activate
pip install -r kubespray/requirements.txt
echo "######################################################################################"
echo "## Customizing vagrant dev env"
mkdir -p kubespray/vagrant
cat << EOF > kubespray/vagrant/config.rb
\$instance_name_prefix = "k8s"
\$vm_cpus = 4
\$num_instances = 1
\$os = "centos"
\$subnet = "10.0.20"
\$network_plugin = "calico"
\$shared_folders = { 'temp/docker_rpms' => "/var/cache/yum/x86_64/7/docker-ce/packages" }
\$kube_node_instances_with_disks_number = 0
EOF
# make the rpm cache
mkdir -p kubespray/temp/docker_rpms
echo "###############"
echo "Now cd to kubespray and 'vagrant up'"
echo ""
echo "export KUBECONFIG=\"$( pwd )/kubespray/inventory/sample/artifacts/admin.conf\""
echo "######################################################################################"
echo "## Preparing real prod environment"
cp -r kubespray/inventory/sample kubespray/inventory/prod
rm kubespray/inventory/prod/inventory.ini
cp ./prod.ini kubespray/inventory/prod/inventory.ini
echo "to deploy execute:"
echo "$ cd kubespray"
echo "$ ansible-playbook -i inventory/prod/inventory.ini cluster.yml"

31
bootstrap/init_kubespray.sh
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@ -1,31 +0,0 @@
#!/bin/sh
# use virtualenv to install all python requirements
VENVDIR=venv
virtualenv --python=/usr/bin/python3.7 $VENVDIR
source $VENVDIR/bin/activate
pip install -r kubespray/requirements.txt
# prepare an inventory to test with
INV=dev
mv kubespray/${INV} kubespray/${INV}.bak &> /dev/null
cp -a kubespray/inventory/sample kubespray/${INV}
# customize the vagrant environment
mkdir -p kubespray/vagrant
cat << EOF > kubespray/vagrant/config.rb
\$instance_name_prefix = "k9s"
\$vm_cpus = 4
\$num_instances = 1
\$os = "centos"
\$subnet = "10.0.20"
\$network_plugin = "flannel"
\$inventory = "$INV"
\$shared_folders = { 'temp/docker_rpms' => "/var/cache/yum/x86_64/7/docker-ce/packages" }
\$kube_node_instances_with_disks_number = 0
EOF
# make the rpm cache
mkdir -p kubespray/temp/docker_rpms
echo "Now cd to kubespray and 'vagrant up'"

40
bootstrap/prod.ini Normal file
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@ -0,0 +1,40 @@
# ## Configure 'ip' variable to bind kubernetes services on a
# ## different ip than the default iface
# ## We should set etcd_member_name for etcd cluster. The node that is not a etcd member do not need to set the value, or can set the empty string value.
[all]
ns3032787.ip-91-121-84.eu ansible_host=91.121.84.190 etcd_member_name=etcd1 ansible_become=yes ansible_become_method=sudo ansible_python_interpreter=/usr/bin/python3
# node1 ansible_host=95.54.0.12 # ip=10.3.0.1 etcd_member_name=etcd1
# node2 ansible_host=95.54.0.13 # ip=10.3.0.2 etcd_member_name=etcd2
# node3 ansible_host=95.54.0.14 # ip=10.3.0.3 etcd_member_name=etcd3
# node4 ansible_host=95.54.0.15 # ip=10.3.0.4 etcd_member_name=etcd4
# node5 ansible_host=95.54.0.16 # ip=10.3.0.5 etcd_member_name=etcd5
# node6 ansible_host=95.54.0.17 # ip=10.3.0.6 etcd_member_name=etcd6
# ## configure a bastion host if your nodes are not directly reachable
# bastion ansible_host=x.x.x.x ansible_user=some_user
[kube-master]
ns3032787.ip-91-121-84.eu
# node1
# node2
[etcd]
ns3032787.ip-91-121-84.eu
# node1
# node2
# node3
[kube-node]
ns3032787.ip-91-121-84.eu
# node2
# node3
# node4
# node5
# node6
[calico-rr]
[k8s-cluster:children]
kube-master
kube-node
calico-rr

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2
terraform/ovh.tf
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@ -49,7 +49,7 @@ resource "ovh_domain_zone_record" "haumdaucher_domain" {
subdomain = ""
fieldtype = "A"
ttl = local.ttl
target = "91.121.64.43"
target = "91.121.84.190"
}

4
terraform/terraform.tfstate
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@ -1,7 +1,7 @@
{
"version": 4,
"terraform_version": "0.12.20",
"serial": 67,
"serial": 69,
"lineage": "8aff5d23-05f6-10eb-0ae6-1084c787677e",
"outputs": {},
"resources": [
@ -217,7 +217,7 @@
"fieldtype": "A",
"id": "5106871420",
"subdomain": "",
"target": "91.121.64.43",
"target": "91.121.84.190",
"ttl": 60,
"zone": "haumdaucher.de"
},

15
terraform/terraform.tfstate.backup
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@ -1,7 +1,7 @@
{
"version": 4,
"terraform_version": "0.12.20",
"serial": 65,
"serial": 67,
"lineage": "8aff5d23-05f6-10eb-0ae6-1084c787677e",
"outputs": {},
"resources": [
@ -352,6 +352,19 @@
},
"private": "bnVsbA=="
},
{
"index_key": "corona-api",
"schema_version": 0,
"attributes": {
"fieldtype": "CNAME",
"id": "5110478866",
"subdomain": "corona-api",
"target": "moritzgraf.de.",
"ttl": 60,
"zone": "moritzgraf.de"
},
"private": "bnVsbA=="
},
{
"index_key": "git",
"schema_version": 0,