diff --git a/inventory/group_vars/all.yml b/inventory/group_vars/all.yml index 4c4d4b4fb..e87dfb820 100644 --- a/inventory/group_vars/all.yml +++ b/inventory/group_vars/all.yml @@ -93,7 +93,8 @@ upstream_dns_servers: dns_setup: true dns_domain: "{{ cluster_name }}" # -# # Ip address of the kubernetes dns service +# # Ip address of the kubernetes skydns service +skydns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(3)|ipaddr('address') }}" dns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(2)|ipaddr('address') }}" # For multi masters architecture: diff --git a/roles/dnsmasq/library/kube.py b/roles/dnsmasq/library/kube.py new file mode 100644 index 000000000..bf4f2d05b --- /dev/null +++ b/roles/dnsmasq/library/kube.py @@ -0,0 +1,309 @@ +#!/usr/bin/python +# -*- coding: utf-8 -*- + +DOCUMENTATION = """ +--- +module: kube +short_description: Manage Kubernetes Cluster +description: + - Create, replace, remove, and stop resources within a Kubernetes Cluster +version_added: "2.0" +options: + name: + required: false + default: null + description: + - The name associated with resource + filename: + required: false + default: null + description: + - The path and filename of the resource(s) definition file. + namespace: + required: false + default: null + description: + - The namespace associated with the resource(s) + resource: + required: false + default: null + description: + - The resource to perform an action on. pods (po), replicationControllers (rc), services (svc) + label: + required: false + default: null + description: + - The labels used to filter specific resources. + server: + required: false + default: null + description: + - The url for the API server that commands are executed against. + api_version: + required: false + choices: ['v1', 'v1beta3'] + default: v1 + description: + - The API version associated with cluster. + force: + required: false + default: false + description: + - A flag to indicate to force delete, replace, or stop. + all: + required: false + default: false + description: + - A flag to indicate delete all, stop all, or all namespaces when checking exists. + log_level: + required: false + default: 0 + description: + - Indicates the level of verbosity of logging by kubectl. + state: + required: false + choices: ['present', 'absent', 'latest', 'reloaded', 'stopped'] + default: present + description: + - present handles checking existence or creating if definition file provided, + absent handles deleting resource(s) based on other options, + latest handles creating ore updating based on existence, + reloaded handles updating resource(s) definition using definition file, + stopped handles stopping resource(s) based on other options. +requirements: + - kubectl +author: "Kenny Jones (@kenjones-cisco)" +""" + +EXAMPLES = """ +- name: test nginx is present + kube: name=nginx resource=rc state=present + +- name: test nginx is stopped + kube: name=nginx resource=rc state=stopped + +- name: test nginx is absent + kube: name=nginx resource=rc state=absent + +- name: test nginx is present + kube: filename=/tmp/nginx.yml +""" + + +class KubeManager(object): + + def __init__(self, module): + + self.module = module + + self.base_cmd = [module.get_bin_path('kubectl', True)] + self.api_version = module.params.get('api_version') + + if self.api_version: + self.base_cmd.append('--api-version=' + self.api_version) + + if module.params.get('server'): + self.base_cmd.append('--server=' + module.params.get('server')) + + if module.params.get('log_level'): + self.base_cmd.append('--v=' + str(module.params.get('log_level'))) + + if module.params.get('namespace'): + self.base_cmd.append('--namespace=' + module.params.get('namespace')) + + self.all = module.params.get('all') + self.force = module.params.get('force') + self.name = module.params.get('name') + self.filename = module.params.get('filename') + self.resource = module.params.get('resource') + self.label = module.params.get('label') + + def _execute(self, cmd): + args = self.base_cmd + cmd + try: + rc, out, err = self.module.run_command(args) + if rc != 0: + self.module.fail_json( + msg='error running kubectl (%s) command (rc=%d): %s' % (' '.join(args), rc, out or err)) + except Exception as exc: + self.module.fail_json( + msg='error running kubectl (%s) command: %s' % (' '.join(args), str(exc))) + return out.splitlines() + + def _execute_nofail(self, cmd): + args = self.base_cmd + cmd + rc, out, err = self.module.run_command(args) + if rc != 0: + return None + return out.splitlines() + + def create(self, check=True): + if check and self.exists(): + return [] + + cmd = ['create'] + + if not self.filename: + self.module.fail_json(msg='filename required to create') + + cmd.append('--filename=' + self.filename) + + return self._execute(cmd) + + def replace(self): + + if not self.force and not self.exists(): + return [] + + cmd = ['replace'] + if self.api_version != 'v1': + cmd = ['update'] + + if self.force: + cmd.append('--force') + + if not self.filename: + self.module.fail_json(msg='filename required to reload') + + cmd.append('--filename=' + self.filename) + + return self._execute(cmd) + + def delete(self): + + if not self.force and not self.exists(): + return [] + + cmd = ['delete'] + + if self.filename: + cmd.append('--filename=' + self.filename) + else: + if not self.resource: + self.module.fail_json(msg='resource required to delete without filename') + + cmd.append(self.resource) + + if self.name: + cmd.append(self.name) + + if self.label: + cmd.append('--selector=' + self.label) + + if self.all: + cmd.append('--all') + + if self.force: + cmd.append('--ignore-not-found') + + return self._execute(cmd) + + def exists(self): + cmd = ['get'] + + if not self.resource: + return False + + cmd.append(self.resource) + + if self.name: + cmd.append(self.name) + + cmd.append('--no-headers') + + if self.label: + cmd.append('--selector=' + self.label) + + if self.all: + cmd.append('--all-namespaces') + + result = self._execute_nofail(cmd) + if not result: + return False + return True + + def stop(self): + + if not self.force and not self.exists(): + return [] + + cmd = ['stop'] + + if self.filename: + cmd.append('--filename=' + self.filename) + else: + if not self.resource: + self.module.fail_json(msg='resource required to stop without filename') + + cmd.append(self.resource) + + if self.name: + cmd.append(self.name) + + if self.label: + cmd.append('--selector=' + self.label) + + if self.all: + cmd.append('--all') + + if self.force: + cmd.append('--ignore-not-found') + + return self._execute(cmd) + + +def main(): + + module = AnsibleModule( + argument_spec=dict( + name=dict(), + filename=dict(), + namespace=dict(), + resource=dict(), + label=dict(), + server=dict(), + api_version=dict(default='v1', choices=['v1', 'v1beta3']), + force=dict(default=False, type='bool'), + all=dict(default=False, type='bool'), + log_level=dict(default=0, type='int'), + state=dict(default='present', choices=['present', 'absent', 'latest', 'reloaded', 'stopped']), + ) + ) + + changed = False + + manager = KubeManager(module) + state = module.params.get('state') + + if state == 'present': + result = manager.create() + + elif state == 'absent': + result = manager.delete() + + elif state == 'reloaded': + result = manager.replace() + + elif state == 'stopped': + result = manager.stop() + + elif state == 'latest': + if manager.exists(): + manager.force = True + result = manager.replace() + else: + result = manager.create(check=False) + + else: + module.fail_json(msg='Unrecognized state %s.' % state) + + if result: + changed = True + module.exit_json(changed=changed, + msg='success: %s' % (' '.join(result)) + ) + + +from ansible.module_utils.basic import * # noqa +if __name__ == '__main__': + main() diff --git a/roles/dnsmasq/tasks/main.yml b/roles/dnsmasq/tasks/main.yml index 01b898fda..ced62b2d5 100644 --- a/roles/dnsmasq/tasks/main.yml +++ b/roles/dnsmasq/tasks/main.yml @@ -31,11 +31,26 @@ dest: /etc/dnsmasq.d/01-kube-dns.conf state: link -- name: Create dnsmasq pod manifest - template: src=dnsmasq-pod.yml dest=/etc/kubernetes/manifests/dnsmasq-pod.manifest +- name: Create dnsmasq manifests + template: src={{item.file}} dest=/etc/kubernetes/{{item.file}} + with_items: + - {file: dnsmasq-ds.yml, type: ds} + - {file: dnsmasq-svc.yml, type: svc} + register: manifests + +- name: Start resources + kube: + name: dnsmasq + namespace: kube-system + resource: "{{item.item.type}}" + filename: /etc/kubernetes/{{item.item.file}} + state: "{{item.changed | ternary('latest','present') }}" + with_items: manifests.results + - name: Check for dnsmasq port (pulling image and running container) wait_for: + host: "{{dns_server}}" port: 53 delay: 5 @@ -59,7 +74,7 @@ - name: Add local dnsmasq to resolv.conf lineinfile: - line: "nameserver 127.0.0.1" + line: "nameserver {{dns_server}}" dest: "{{resolvconffile}}" state: present insertafter: "^search.*$" diff --git a/roles/dnsmasq/templates/01-kube-dns.conf.j2 b/roles/dnsmasq/templates/01-kube-dns.conf.j2 index 7a46bee82..5ade101ce 100644 --- a/roles/dnsmasq/templates/01-kube-dns.conf.j2 +++ b/roles/dnsmasq/templates/01-kube-dns.conf.j2 @@ -1,6 +1,6 @@ #Listen on localhost bind-interfaces -listen-address=127.0.0.1 +listen-address=0.0.0.0 addn-hosts=/etc/hosts @@ -17,4 +17,4 @@ server={{ srv }} {% endif %} # Forward k8s domain to kube-dns -server=/{{ dns_domain }}/{{ dns_server }} +server=/{{ dns_domain }}/{{ skydns_server }} diff --git a/roles/dnsmasq/templates/dnsmasq-ds.yml b/roles/dnsmasq/templates/dnsmasq-ds.yml new file mode 100644 index 000000000..daabf63f3 --- /dev/null +++ b/roles/dnsmasq/templates/dnsmasq-ds.yml @@ -0,0 +1,53 @@ +--- +apiVersion: extensions/v1beta1 +kind: DaemonSet +metadata: + name: dnsmasq + namespace: kube-system + labels: + k8s-app: dnsmasq +spec: + template: + metadata: + labels: + k8s-app: dnsmasq + spec: + containers: + - name: dnsmasq + image: andyshinn/dnsmasq:2.72 + command: + - dnsmasq + args: + - -k + - "-7" + - /etc/dnsmasq.d + - --local-service + securityContext: + capabilities: + add: + - NET_ADMIN + imagePullPolicy: Always + resources: + limits: + cpu: 100m + memory: 256M + ports: + - name: dns + containerPort: 53 + protocol: UDP + - name: dns-tcp + containerPort: 53 + protocol: TCP + volumeMounts: + - name: etcdnsmasqd + mountPath: /etc/dnsmasq.d + - name: etcdnsmasqdavailable + mountPath: /etc/dnsmasq.d-available + + volumes: + - name: etcdnsmasqd + hostPath: + path: /etc/dnsmasq.d + - name: etcdnsmasqdavailable + hostPath: + path: /etc/dnsmasq.d-available diff --git a/roles/dnsmasq/templates/dnsmasq-pod.yml b/roles/dnsmasq/templates/dnsmasq-pod.yml deleted file mode 100644 index 1150e14c7..000000000 --- a/roles/dnsmasq/templates/dnsmasq-pod.yml +++ /dev/null @@ -1,49 +0,0 @@ ---- -apiVersion: v1 -kind: Pod -metadata: - name: dnsmasq - namespace: kube-system -spec: - hostNetwork: true - containers: - - name: dnsmasq - image: andyshinn/dnsmasq:2.72 - command: - - dnsmasq - args: - - -k - - "-7" - - /etc/dnsmasq.d - - --local-service - securityContext: - capabilities: - add: - - NET_ADMIN - imagePullPolicy: Always - resources: - limits: - cpu: 100m - memory: 256M - ports: - - name: dns - containerPort: 53 - hostPort: 53 - protocol: UDP - - name: dns-tcp - containerPort: 53 - hostPort: 53 - protocol: TCP - volumeMounts: - - name: etcdnsmasqd - mountPath: /etc/dnsmasq.d - - name: etcdnsmasqdavailable - mountPath: /etc/dnsmasq.d-available - - volumes: - - name: etcdnsmasqd - hostPath: - path: /etc/dnsmasq.d - - name: etcdnsmasqdavailable - hostPath: - path: /etc/dnsmasq.d-available diff --git a/roles/dnsmasq/templates/dnsmasq-svc.yml b/roles/dnsmasq/templates/dnsmasq-svc.yml new file mode 100644 index 000000000..52be6fd83 --- /dev/null +++ b/roles/dnsmasq/templates/dnsmasq-svc.yml @@ -0,0 +1,23 @@ +--- +apiVersion: v1 +kind: Service +metadata: + labels: + kubernetes.io/cluster-service: 'true' + k8s-app: dnsmasq + name: dnsmasq + namespace: kube-system +spec: + ports: + - port: 53 + name: dns-tcp + targetPort: 53 + protocol: TCP + - port: 53 + name: dns + targetPort: 53 + protocol: UDP + type: ClusterIP + clusterIP: {{dns_server}} + selector: + k8s-app: dnsmasq