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# Files | ||
.DS_Store |
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# The MIT License (MIT) | ||
Copyright 2020 Rafael Grigorian | ||
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* * * | ||
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Permission is hereby granted, free of charge, to any person obtaining a copy of | ||
this software and associated documentation files (the "Software"), to deal in | ||
the Software without restriction, including without limitation the rights to | ||
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of | ||
the Software, and to permit persons to whom the Software is furnished to do so, | ||
subject to the following conditions: | ||
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The above copyright notice and this permission notice shall be included in all | ||
copies or substantial portions of the Software. | ||
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS | ||
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR | ||
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER | ||
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | ||
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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# Kube-Switch | ||
> Switch between Kubernetes context & namespace using an interactive menu. | ||
![MIT License](https://img.shields.io/badge/License-MIT-yellow.svg?style=for-the-badge) | ||
![Version 1.0.0](https://img.shields.io/badge/Version-1.0.0-yellow.svg?style=for-the-badge) | ||
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### About | ||
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Similar to [kubectx](https://github.com/ahmetb/kubectx) & [kubens](https://github.com/ahmetb/kubectx), but with the ability to pick using arrow keys. | ||
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### Install (Homebrew) | ||
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```shell | ||
$ brew install null93/kube-switch/kube-switch | ||
$ bind -x '"\C-k":"kube-switch"' | ||
``` |
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#!/usr/bin/env python3 | ||
# | ||
# The MIT License (MIT) | ||
# Copyright 2020, Rafael Grigorian <rafael@grigorian.org> | ||
# | ||
# --- | ||
# | ||
# Permission is hereby granted, free of charge, to any person obtaining a copy of | ||
# this software and associated documentation files (the "Software"), to deal in | ||
# the Software without restriction, including without limitation the rights to | ||
# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of | ||
# the Software, and to permit persons to whom the Software is furnished to do so, | ||
# subject to the following conditions: | ||
# | ||
# The above copyright notice and this permission notice shall be included in all | ||
# copies or substantial portions of the Software. | ||
# | ||
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS | ||
# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR | ||
# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER | ||
# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | ||
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | ||
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import yaml, re, sys, tty, termios | ||
from os import path | ||
from kubernetes import client, config | ||
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def get_char (): | ||
fd = sys.stdin.fileno () | ||
old_settings = termios.tcgetattr ( fd ) | ||
try: | ||
tty.setcbreak ( fd ) | ||
ch = sys.stdin.read ( 1 ) | ||
finally: | ||
termios.tcsetattr ( fd, termios.TCSADRAIN, old_settings ) | ||
return ch | ||
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class ANSI: | ||
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def civis (): | ||
print ( "\033[?25l", end = "" ) | ||
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def cnorm (): | ||
print ( "\033[34h\033[?25h", end = "" ) | ||
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def smcup (): | ||
print ( "\033[?1049h\033[H", end = "" ) | ||
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def rmcup (): | ||
print ( "\033[?1049l", end = "" ) | ||
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def clear (): | ||
print ( "\033[H\033[2J", end = "" ) | ||
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def set_cursor ( r, c ): | ||
print ( "\033[%d;%dH" % ( r, c ), end = "" ) | ||
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def selection_color ( message ): | ||
return "\033[43;30m%s\033[0m" % message | ||
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def active_color ( message ): | ||
return "\033[33m%s\033[0m" % message | ||
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def error_color ( message ): | ||
return "\033[31m%s\033[0m" % message | ||
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def is_arrow ( queue ): | ||
if len ( queue ) is 3: | ||
return queue [ 0 ] is 27 and queue [ 1 ] is 91 | ||
return False | ||
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class Kube: | ||
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config_path = None | ||
config_yaml = None | ||
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contexts = None | ||
context = None | ||
context_names = None | ||
active_context = None | ||
active_context_index = None | ||
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namespaces = None | ||
namespace = None | ||
namespace_names = None | ||
active_namespace = None | ||
active_namespace_index = None | ||
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def __init__ ( self ): | ||
relative = config.kube_config.KUBE_CONFIG_DEFAULT_LOCATION | ||
self.config_path = path.expanduser ( relative ) | ||
self.load_config () | ||
self.contexts, self.context = config.list_kube_config_contexts () | ||
self.context_names = list ( map ( lambda x : x ["name"], self.contexts ) ) | ||
self.active_context = self.context ["name"] | ||
self.active_namespace = self.context ["context"] ["namespace"] | ||
self.active_context_index = self.context_names.index ( self.active_context ) | ||
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def load_config ( self ): | ||
with open ( self.config_path ) as file: | ||
self.config_yaml = yaml.load ( file, Loader = yaml.FullLoader ) | ||
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def save_config ( self ): | ||
with open ( self.config_path, 'w' ) as file: | ||
yaml.dump ( self.config_yaml, file, default_flow_style = False ) | ||
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def get_api ( self, context_name ): | ||
api_config = config.new_client_from_config ( context = context_name ) | ||
return client.CoreV1Api ( api_client = api_config ) | ||
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def set_context ( self, chosen ): | ||
self.config_yaml ["current-context"] = chosen | ||
self.save_config () | ||
self.context = next ( e for e in self.contexts if e ["name"] == chosen ) | ||
self.active_context = self.context ["name"] | ||
self.active_namespace = self.context ["context"] ["namespace"] | ||
self.active_context_index = self.context_names.index ( self.active_context ) | ||
self.namespaces = list ( self.get_api ( chosen ).list_namespace ( timeout_seconds = 1 ).items ) | ||
self.namespace = next ( e for e in self.namespaces if e.metadata.name == self.active_namespace ) | ||
self.namespace_names = list ( map ( lambda x : x .metadata.name, self.namespaces ) ) | ||
self.active_namespace_index = self.namespace_names.index ( self.active_namespace ) | ||
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def set_namespace ( self, chosen ): | ||
self.namespace = next ( e for e in self.namespaces if e.metadata.name == chosen ) | ||
self.active_namespace = chosen | ||
self.active_namespace_index = self.namespace_names.index ( chosen ) | ||
index = list ( map ( lambda x : x ["name"], self.contexts ) ).index ( self.active_context ) | ||
self.config_yaml ["contexts"] [ index ] ["context"] ["namespace"] = chosen | ||
self.save_config () | ||
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def prompt ( self, title, choices, active_index = None ): | ||
filter = "" | ||
key_queue = [] | ||
selection = active_index | ||
current_value = choices [ active_index ] | ||
return_value = None | ||
while True: | ||
filtered_choices = [i for i in choices if filter in i] | ||
selection = filtered_choices.index ( current_value ) if selection is -2 and current_value in filtered_choices else selection | ||
selection = min ( max ( selection, 0 ), len ( filtered_choices ) - 1 ) | ||
selected_value = None if len ( filtered_choices ) is 0 else filtered_choices [ selection ] | ||
ANSI.clear () | ||
ANSI.civis () | ||
ANSI.set_cursor ( 1, 1 ) | ||
print ( "Filter: %s" % filter, end = "" ) | ||
print ( ANSI.active_color ("_") ) | ||
print ("Type to filter, UP/DOWN move, ENTER select, ESC exit\n") | ||
print ( "%s: %s\n" % ( title, selected_value ) ) | ||
for index, choice in enumerate ( filtered_choices ): | ||
if index is selection: | ||
print ( ANSI.selection_color ( " + %s " % choice ) ) | ||
elif current_value is choice: | ||
print ( ANSI.active_color ( " + %s " % choice ) ) | ||
else: | ||
print ( " + %s" % choice ) | ||
if len ( filtered_choices ) is 0: | ||
print ( ANSI.error_color ("No results; refine filter.") ) | ||
ANSI.set_cursor ( 1, len ( filter ) + 9 ) | ||
char = get_char () | ||
key_queue.append ( ord ( char ) ) | ||
key_queue = key_queue [-3:] | ||
ANSI.set_cursor ( 30, 1 ) | ||
if ord ( char ) is 3: | ||
return_value = None | ||
break | ||
elif ord ( char ) is 13 or ord ( char ) is 10: | ||
if len ( filtered_choices ) is not 0: | ||
return_value = selected_value | ||
break | ||
elif ord ( char ) is 127: | ||
filter = filter [0:-1] | ||
selection = -2 | ||
elif ord ( char ) is 68 or ord ( char ) is 67: | ||
continue | ||
elif is_arrow ( key_queue ) and ord ( char ) is 65: | ||
if len ( filtered_choices ) > 0: | ||
selection -= 1 | ||
elif is_arrow ( key_queue ) and ord ( char ) is 66: | ||
if len ( filtered_choices ) > 0: | ||
selection += 1 | ||
elif re.match ( "^[0-9a-z-_]*$", str ( char ), re.IGNORECASE ): | ||
filter += str ( char ) | ||
selection = -2 | ||
ANSI.clear () | ||
ANSI.cnorm () | ||
return return_value | ||
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def main (): | ||
ANSI.smcup () | ||
try: | ||
kube = Kube () | ||
chosen_context = kube.prompt ( | ||
"Pick Kubernetes Context", | ||
kube.context_names, | ||
kube.active_context_index | ||
) | ||
if chosen_context is not None: | ||
kube.set_context ( chosen_context ) | ||
chosen_namespace = kube.prompt ( | ||
"Pick Kubernetes Namespace", | ||
kube.namespace_names, | ||
kube.active_namespace_index | ||
) | ||
if chosen_namespace is not None: | ||
kube.set_namespace ( chosen_namespace ) | ||
except ( KeyboardInterrupt, SystemExit ): | ||
ANSI.rmcup () | ||
ANSI.cnorm () | ||
except: | ||
ANSI.rmcup () | ||
ANSI.cnorm () | ||
print ( ANSI.error_color ("Error") + ": failed to communicate with k8s." ) | ||
# raise | ||
else: | ||
ANSI.rmcup () | ||
ANSI.cnorm () | ||
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if __name__ == "__main__": | ||
main () |
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appdirs==1.4.4 | ||
cachetools==4.1.0 | ||
certifi==2019.11.28 | ||
chardet==3.0.4 | ||
distlib==0.3.0 | ||
filelock==3.0.12 | ||
future==0.18.2 | ||
google-auth==1.16.1 | ||
homebrew-pypi-poet==0.10.0 | ||
idna==2.8 | ||
importlib-metadata==1.6.1 | ||
Jinja2==2.11.2 | ||
kubernetes==11.0.0 | ||
MarkupSafe==1.1.1 | ||
netaddr==0.7.19 | ||
netifaces==0.10.9 | ||
oauthlib==3.1.0 | ||
packaging==19.2 | ||
pbr==5.4.5 | ||
pick==0.6.7 | ||
prettytable==0.7.2 | ||
pyasn1==0.4.8 | ||
pyasn1-modules==0.2.8 | ||
pyparsing==2.4.5 | ||
python-dateutil==2.8.1 | ||
PyYAML==5.3.1 | ||
requests==2.22.0 | ||
requests-mock==1.7.0 | ||
requests-oauthlib==1.3.0 | ||
rsa==4.0 | ||
ruamel.yaml==0.16.5 | ||
ruamel.yaml.clib==0.2.0 | ||
scapy==2.4.3 | ||
simple-chalk==0.1.0 | ||
six==1.13.0 | ||
stevedore==2.0.0 | ||
urllib3==1.24.3 | ||
virtualenv==20.0.21 | ||
virtualenv-clone==0.5.4 | ||
virtualenvwrapper==4.8.4 | ||
websocket-client==0.57.0 | ||
zipp==3.1.0 |