Merge pull request #376 from Yannig/kubectl
Kubernetes connection support for mitogen.pull/381/head
dw
6 years ago
committed by
GitHub
commit
4356fdf027
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# coding: utf-8
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# Copyright 2018, Yannig Perré
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# 1. Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# 3. Neither the name of the copyright holder nor the names of its contributors
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# may be used to endorse or promote products derived from this software without
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# specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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from __future__ import absolute_import
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import os.path
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import sys
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try:
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import ansible_mitogen
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except ImportError:
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base_dir = os.path.dirname(__file__)
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sys.path.insert(0, os.path.abspath(os.path.join(base_dir, '../../..')))
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del base_dir
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import ansible_mitogen.connection
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class Connection(ansible_mitogen.connection.Connection):
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transport = 'kubectl'
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@ -0,0 +1,78 @@
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# coding: utf-8
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# Copyright 2018, Yannig Perré
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# 1. Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# 3. Neither the name of the copyright holder nor the names of its contributors
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# may be used to endorse or promote products derived from this software without
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# specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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import logging
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import mitogen.core
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import mitogen.parent
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LOG = logging.getLogger(__name__)
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class Stream(mitogen.parent.Stream):
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child_is_immediate_subprocess = True
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pod = None
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container = None
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username = None
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kubectl_path = 'kubectl'
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# TODO: better way of capturing errors such as "No such container."
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create_child_args = {
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'merge_stdio': True
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}
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def construct(self, pod = None, container=None,
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kubectl_path=None, username=None,
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**kwargs):
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assert pod
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super(Stream, self).construct(**kwargs)
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if pod:
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self.pod = pod
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if container:
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self.container = container
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if kubectl_path:
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self.kubectl_path = kubectl_path
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if username:
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self.username = username
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def connect(self):
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super(Stream, self).connect()
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self.name = u'kubectl.' + (self.pod) + str(self.container)
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def get_boot_command(self):
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args = ['exec', '-it', self.pod]
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if self.username:
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args += ['--username=' + self.username]
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if self.container:
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args += ['--container=' + self.container]
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bits = [self.kubectl_path]
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return bits + args + [ "--" ] + super(Stream, self).get_boot_command()
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@ -0,0 +1,91 @@
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---
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- name: "Create pod"
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tags: always
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hosts: localhost
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gather_facts: no
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tasks:
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- name: Create a test pod
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k8s:
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state: present
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definition:
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apiVersion: v1
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kind: Pod
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metadata:
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name: test-pod-{{item}}
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namespace: default
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spec:
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containers:
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- name: python2
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image: python:2
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args: [ "sleep", "100000" ]
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loop: "{{ range(10)|list }}"
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- name: "Wait pod to be running"
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debug: { msg: "pod is running" }
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# status and availableReplicas might not be there. Using default value (d(default_value))
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until: "pod_def.status.containerStatuses[0].ready"
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# Waiting 100 s
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retries: 50
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delay: 2
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vars:
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pod_def: "{{lookup('k8s', kind='Pod', namespace='default', resource_name='test-pod-' ~ item)}}"
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loop: "{{ range(10)|list }}"
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- name: "Add pod to pods group"
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add_host:
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name: "test-pod-{{item}}"
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groups: [ "pods" ]
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ansible_connection: "kubectl"
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changed_when: no
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tags: "always"
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loop: "{{ range(10)|list }}"
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- name: "Test kubectl connection (default strategy)"
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tags: default
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hosts: pods
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strategy: "linear"
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gather_facts: no
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tasks:
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- name: "Simple shell with linear"
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shell: ls /tmp
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loop: [ 1, 2, 3, 4, 5 ]
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- name: "Simple file with linear"
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file:
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path: "/etc"
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state: directory
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loop: [ 1, 2, 3, 4, 5 ]
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- name: "Test kubectl connection (mitogen strategy)"
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tags: mitogen
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hosts: pods
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strategy: "mitogen_linear"
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gather_facts: no
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tasks:
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- name: "Simple shell with mitogen"
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shell: ls /tmp
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loop: [ 1, 2, 3, 4, 5 ]
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- name: "Simple file with mitogen"
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file:
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path: "/etc"
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state: directory
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loop: [ 1, 2, 3, 4, 5 ]
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register: _
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- name: "Destroy pod"
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tags: cleanup
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hosts: localhost
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gather_facts: no
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tasks:
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- name: Destroy pod
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k8s:
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state: absent
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definition:
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apiVersion: v1
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kind: Pod
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metadata:
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name: test-pod-{{item}}
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namespace: default
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loop: "{{ range(10)|list }}"
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