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Support multiple artifacts under individual inventory directory

pull/2347/head
Wong Hoi Sing Edison 6 years ago
parent
commit
a086686e9f
6 changed files with 56 additions and 42 deletions
  1. 2
      .gitignore
  2. 70
      docs/getting-started.md
  3. 4
      inventory/sample/group_vars/k8s-cluster.yml
  4. 2
      roles/kubernetes/client/defaults/main.yml
  5. 16
      roles/kubernetes/client/tasks/main.yml
  6. 4
      roles/kubespray-defaults/defaults/main.yaml

2
.gitignore

@ -23,7 +23,7 @@ __pycache__/
# Distribution / packaging
.Python
artifacts/
inventory/*/artifacts/
env/
build/
credentials/

70
docs/getting-started.md

@ -18,11 +18,9 @@ certain threshold. Run `python3 contrib/inventory_builder/inventory.py help` hel
Example inventory generator usage:
```
cp -r inventory/sample inventory/mycluster
declare -a IPS=(10.10.1.3 10.10.1.4 10.10.1.5)
CONFIG_FILE=inventory/mycluster/hosts.ini python3 contrib/inventory_builder/inventory.py ${IPS[@]}
```
cp -r inventory/sample inventory/mycluster
declare -a IPS=(10.10.1.3 10.10.1.4 10.10.1.5)
CONFIG_FILE=inventory/mycluster/hosts.ini python3 contrib/inventory_builder/inventory.py ${IPS[@]}
Starting custom deployment
--------------------------
@ -30,12 +28,10 @@ Starting custom deployment
Once you have an inventory, you may want to customize deployment data vars
and start the deployment:
**IMPORTANT: Edit my_inventory/groups_vars/*.yaml to override data vars**
**IMPORTANT**: Edit my\_inventory/groups\_vars/\*.yaml to override data vars:
```
ansible-playbook -i inventory/mycluster/hosts.ini cluster.yml -b -v \
--private-key=~/.ssh/private_key
```
ansible-playbook -i inventory/mycluster/hosts.ini cluster.yml -b -v \
--private-key=~/.ssh/private_key
See more details in the [ansible guide](ansible.md).
@ -44,31 +40,31 @@ Adding nodes
You may want to add **worker** nodes to your existing cluster. This can be done by re-running the `cluster.yml` playbook, or you can target the bare minimum needed to get kubelet installed on the worker and talking to your masters. This is especially helpful when doing something like autoscaling your clusters.
- Add the new worker node to your inventory under kube-node (or utilize a [dynamic inventory](https://docs.ansible.com/ansible/intro_dynamic_inventory.html)).
- Run the ansible-playbook command, substituting `scale.yml` for `cluster.yml`:
```
ansible-playbook -i inventory/mycluster/hosts.ini scale.yml -b -v \
--private-key=~/.ssh/private_key
```
- Add the new worker node to your inventory under kube-node (or utilize a [dynamic inventory](https://docs.ansible.com/ansible/intro_dynamic_inventory.html)).
- Run the ansible-playbook command, substituting `scale.yml` for `cluster.yml`:
ansible-playbook -i inventory/mycluster/hosts.ini scale.yml -b -v \
--private-key=~/.ssh/private_key
Connecting to Kubernetes
------------------------
By default, Kubespray configures kube-master hosts with insecure access to
kube-apiserver via port 8080. A kubeconfig file is not necessary in this case,
because kubectl will use http://localhost:8080 to connect. The kubeconfig files
because kubectl will use <http://localhost:8080> to connect. The kubeconfig files
generated will point to localhost (on kube-masters) and kube-node hosts will
connect either to a localhost nginx proxy or to a loadbalancer if configured.
More details on this process are in the [HA guide](ha-mode.md).
Kubespray permits connecting to the cluster remotely on any IP of any
kube-master host on port 6443 by default. However, this requires
authentication. One could generate a kubeconfig based on one installed
Kubespray permits connecting to the cluster remotely on any IP of any
kube-master host on port 6443 by default. However, this requires
authentication. One could generate a kubeconfig based on one installed
kube-master hosts (needs improvement) or connect with a username and password.
By default, a user with admin rights is created, named `kube`.
The password can be viewed after deployment by looking at the file
The password can be viewed after deployment by looking at the file
`PATH_TO_KUBESPRAY/credentials/kube_user`. This contains a randomly generated
password. If you wish to set your own password, just precreate/modify this
file yourself.
file yourself.
For more information on kubeconfig and accessing a Kubernetes cluster, refer to
the Kubernetes [documentation](https://kubernetes.io/docs/tasks/access-application-cluster/configure-access-multiple-clusters/).
@ -77,29 +73,33 @@ Accessing Kubernetes Dashboard
------------------------------
As of kubernetes-dashboard v1.7.x:
* New login options that use apiserver auth proxying of token/basic/kubeconfig by default
* Requires RBAC in authorization_modes
* Only serves over https
* No longer available at https://first_master:6443/ui until apiserver is updated with the https proxy URL
- New login options that use apiserver auth proxying of token/basic/kubeconfig by default
- Requires RBAC in authorization\_modes
- Only serves over https
- No longer available at <https://first_master:6443/ui> until apiserver is updated with the https proxy URL
If the variable `dashboard_enabled` is set (default is true), then you can access the Kubernetes Dashboard at the following URL, You will be prompted for credentials:
https://first_master:6443/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/#!/login
<https://first_master:6443/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/#!/login>
Or you can run 'kubectl proxy' from your local machine to access dashboard in your browser from:
http://localhost:8001/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/#!/login
<http://localhost:8001/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/#!/login>
It is recommended to access dashboard from behind a gateway (like Ingress Controller) that enforces an authentication token. Details and other access options here: https://github.com/kubernetes/dashboard/wiki/Accessing-Dashboard---1.7.X-and-above
It is recommended to access dashboard from behind a gateway (like Ingress Controller) that enforces an authentication token. Details and other access options here: <https://github.com/kubernetes/dashboard/wiki/Accessing-Dashboard---1.7.X-and-above>
Accessing Kubernetes API
------------------------
The main client of Kubernetes is `kubectl`. It is installed on each kube-master
host and can optionally be configured on your ansible host by setting
`kubeconfig_localhost: true` in the configuration. If enabled, kubectl and
admin.conf will appear in the artifacts/ directory after deployment. You can
see a list of nodes by running the following commands:
`kubectl_localhost: true` and `kubeconfig_localhost: true` in the configuration:
- If `kubectl_localhost` enabled, `kubectl` will download onto `/usr/local/bin/` and setup with bash completion. A helper script `inventory/mycluster/artifacts/kubectl.sh` also created for setup with below `admin.conf`.
- If `kubeconfig_localhost` enabled `admin.conf` will appear in the `inventory/mycluster/artifacts/` directory after deployment.
You can see a list of nodes by running the following commands:
cd artifacts/
./kubectl --kubeconfig admin.conf get nodes
cd inventory/mycluster/artifacts
./kubectl.sh get nodes
If desired, copy kubectl to your bin dir and admin.conf to ~/.kube/config.
If desired, copy admin.conf to ~/.kube/config.

4
inventory/sample/group_vars/k8s-cluster.yml

@ -203,9 +203,9 @@ ingress_nginx_enabled: false
# Add Persistent Volumes Storage Class for corresponding cloud provider ( OpenStack is only supported now )
persistent_volumes_enabled: false
# Make a copy of kubeconfig on the host that runs Ansible in GITDIR/artifacts
# Make a copy of kubeconfig on the host that runs Ansible in {{ inventory_dir }}/artifacts
# kubeconfig_localhost: false
# Download kubectl onto the host that runs Ansible in GITDIR/artifacts
# Download kubectl onto the host that runs Ansible in {{ bin_dir }}
# kubectl_localhost: false
# dnsmasq

2
roles/kubernetes/client/defaults/main.yml

@ -1,7 +1,7 @@
---
kubeconfig_localhost: false
kubectl_localhost: false
artifacts_dir: "./artifacts"
artifacts_dir: "{{ inventory_dir }}/artifacts"
kube_config_dir: "/etc/kubernetes"
kube_apiserver_port: "6443"

16
roles/kubernetes/client/tasks/main.yml

@ -55,9 +55,23 @@
- name: Copy kubectl binary to ansible host
fetch:
src: "{{ bin_dir }}/kubectl"
dest: "{{ artifacts_dir }}/kubectl"
dest: "{{ bin_dir }}/kubectl"
flat: yes
validate_checksum: no
become: no
run_once: yes
when: kubectl_localhost|default(false)
- name: create helper script kubectl.sh on ansible host
copy:
content: |
#!/bin/bash
kubectl --kubeconfig=admin.conf $@
dest: "{{ artifacts_dir }}/kubectl.sh"
owner: root
group: root
mode: 0755
become: no
run_once: yes
delegate_to: localhost
when: kubectl_localhost|default(false) and kubeconfig_localhost|default(false)

4
roles/kubespray-defaults/defaults/main.yaml

@ -152,9 +152,9 @@ helm_deployment_type: host
# Enable kubeadm deployment (experimental)
kubeadm_enabled: false
# Make a copy of kubeconfig on the host that runs Ansible in GITDIR/artifacts
# Make a copy of kubeconfig on the host that runs Ansible in {{ inventory_dir }}/artifacts
kubeconfig_localhost: false
# Download kubectl onto the host that runs Ansible in GITDIR/artifacts
# Download kubectl onto the host that runs Ansible in {{ bin_dir }}
kubectl_localhost: false
# K8s image pull policy (imagePullPolicy)

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