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# Copyright 2020 Alexey Aksenov and individual contributors | ||
# See the LICENSE.txt file at the top-level directory of this distribution. | ||
# | ||
# Licensed under the MIT license | ||
# <LICENSE-MIT or http://opensource.org/licenses/MIT> | ||
# This file may not be copied, modified, or distributed | ||
# except according to those terms. | ||
"""Module collecting instances from Kubernetes namespaces.""" | ||
import copy | ||
import logging | ||
import re | ||
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from kubernetes import client | ||
from kubernetes import config as config | ||
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from cloudselect import Container, Pod | ||
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from . import DiscoveryService | ||
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class Kubernetes(DiscoveryService): | ||
"""Class implementing discovery service plugin.""" | ||
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log = None | ||
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def __init__(self): | ||
"""Class constructor.""" | ||
self.log = logging.getLogger("cloudselect.discovery.kubernetes") | ||
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def run(self): | ||
"""Collect Kubernetes pods.""" | ||
self.log.debug("Discover Kubernetes pods") | ||
return list(self.instances()) | ||
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def instances(self): | ||
"""Collect Kubernetes pods.""" | ||
for i in self.find(): | ||
instance_id = i["metadata"]["uid"] | ||
metadata = self.simplify_metadata(i) | ||
configuration = i["cluster"]["configuration"] | ||
context = i["cluster"]["context"] | ||
ip = i["status"]["pod_ip"] | ||
name = i["metadata"]["name"] | ||
namespace = i["metadata"]["namespace"] | ||
node_ip = i["status"]["host_ip"] | ||
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representation = [instance_id, name] | ||
self.enrich_representation(representation, metadata) | ||
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instance = Pod( | ||
instance_id, | ||
name, | ||
None, | ||
metadata, | ||
representation, | ||
configuration, | ||
context, | ||
namespace, | ||
ip, | ||
node_ip, | ||
) | ||
yield instance | ||
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def find(self): | ||
"""Discover pods in Kubernetes clouds.""" | ||
cluster = Container.config.discovery.cluster() | ||
for cluster_id in cluster: | ||
patterns = [re.compile(i) for i in cluster[cluster_id].get("namespace", [])] | ||
config_file = cluster[cluster_id].get("configuration") | ||
context = cluster[cluster_id].get("context") | ||
api_client = config.new_client_from_config( | ||
config_file=config_file, context=context, | ||
) | ||
version_api = client.VersionApi(api_client=api_client) | ||
version = version_api.get_code() | ||
self.log.debug( | ||
"Connected to '%s', control plane version %s", | ||
cluster_id, | ||
version.git_version, | ||
) | ||
core_v1 = client.CoreV1Api(api_client=api_client) | ||
ret = core_v1.list_pod_for_all_namespaces(watch=False) | ||
for pod in ret.items: | ||
instance = copy.deepcopy(pod.to_dict()) | ||
if instance["status"]["phase"] == "Running": | ||
instance["cluster"] = { | ||
"configuration": config_file, | ||
"context": context, | ||
} | ||
if patterns: | ||
namespace = instance["metadata"]["namespace"] | ||
matched = next( | ||
(m for m in patterns if m.match(namespace) is not None), | ||
None, | ||
) | ||
if matched is not None: | ||
yield instance | ||
else: | ||
yield instance |
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#!/bin/sh | ||
# | ||
# Split arguments by --: | ||
# cloudselect arguments -- exec arguments | ||
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CLOUDSELECT_ARGS=$# | ||
if [ $CLOUDSELECT_ARGS -eq 0 ]; then | ||
python -m cloudselect | ||
exit | ||
fi | ||
for (( i=1; i <= "$#"; i++ )); do | ||
if [ "${!i}" == "--" ]; then | ||
CLOUDSELECT_ARGS=$(($i-1)) | ||
break | ||
fi | ||
done | ||
KEXEC_ARGS=$(($CLOUDSELECT_ARGS+2)) | ||
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OUTPUT=$(python -m cloudselect "${@:1:$CLOUDSELECT_ARGS}") | ||
if [ $? -ne 0 ];then | ||
exit | ||
fi | ||
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CLOUD=$(echo $OUTPUT | jq -r '.instances[] | @base64') | ||
TMUX_LAYOUT=${TMUX_LAYOUT:-tiled} | ||
TMUX_SESSION_NAME="assh-"$(date +%s) | ||
WAIT_FOR_INPUT='read -n 1 -s -r -p "Press any key to continue"' | ||
WINDOW=0 | ||
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OPTION_AFTER=$(echo $OUTPUT | jq -r '.option.after // ""') | ||
OPTION_BEFORE=$(echo $OUTPUT | jq -r '.option.before // ""') | ||
OPTION_SHELL=$(echo $OUTPUT | jq -r '.option.shell // "bash"') | ||
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# Collect shared arguments | ||
for row in $(echo $CLOUD); do | ||
OUTPUT=$(echo ${row} | base64 --decode) | ||
break | ||
done | ||
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test "$OPTION_BEFORE" != "null" && eval "$OPTION_BEFORE" | ||
# Iterate over instances | ||
for row in $(echo $CLOUD); do | ||
OUTPUT=$(echo ${row} | base64 --decode) | ||
HOST=$(echo $OUTPUT | jq -r '.host') | ||
CONFIGURATION="--kubeconfig="$(echo $OUTPUT | jq -r '.configuration // ""') | ||
CONTEXT="--context="$(echo $OUTPUT | jq -r '.context // ""') | ||
NAMESPACE=$(echo $OUTPUT | jq -r '.namespace // ""') | ||
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test "$CONFIGURATION" == "--kubeconfig=" && CONFIGURATION="" | ||
test "$CONTEXT" == "--context=" && CONTEXT="" | ||
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connectString="kubectl $CONFIGURATION $CONTEXT -n $NAMESPACE exec $HOST -i -t $OPTION_SHELL" | ||
commandString="${connectString}; $WAIT_FOR_INPUT" | ||
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if [ $# -ge $KEXEC_ARGS ];then | ||
echo "kubectl $CONFIGURATION $CONTEXT -n $NAMESPACE exec $HOST -- ${@:$KEXEC_ARGS}" | ||
kubectl $CONFIGURATION $CONTEXT -n $NAMESPACE exec $HOST -- ${@:$KEXEC_ARGS} | ||
continue | ||
fi | ||
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tmux list-windows | grep -q "${TMUX_SESSION_NAME}" | ||
if [ $WINDOW -eq 0 -a $? -ne 0 ]; then | ||
tmux new-window -n "${TMUX_SESSION_NAME}" "$commandString" | ||
echo "$connectString" | ||
else | ||
tmux split-window -t "${TMUX_SESSION_NAME}" "${commandString}" && \ | ||
echo "$connectString" | ||
fi | ||
WINDOW=$((WINDOW+1)) | ||
done | ||
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test $WINDOW -gt 0 && tmux set-window-option -t "${TMUX_SESSION_NAME}" synchronize-panes on | ||
test $WINDOW -gt 0 && tmux select-layout -t "${TMUX_SESSION_NAME}" "${TMUX_LAYOUT}" | ||
test "$OPTION_AFTER" != "null" && eval "$OPTION_AFTER" |