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"""The Pods cog helps with managing Kubernetes pods."""
import zoneinfo
from datetime import datetime
import humanize
from discord.ext import commands
from kubernetes_asyncio.client.rest import ApiException
from loguru import logger
from tabulate import tabulate
from arthur.apis.kubernetes import pods
from arthur.bot import KingArthur
from arthur.config import CONFIG
from arthur.utils import generate_error_message
MAX_MESSAGE_LENGTH = 2000
def tabulate_pod_data(data: list[list[str]]) -> str:
"""Tabulate the pod data to be sent to Discord."""
table = tabulate(
data,
headers=["Status", "Pod", "Phase", "IP", "Node", "Age", "Restarts"],
tablefmt="psql",
colalign=("center", "left", "left", "center", "center", "left", "center"),
)
return f"```\n{table}```"
class Pods(commands.Cog):
"""Commands for working with Kubernetes Pods."""
def __init__(self, bot: KingArthur) -> None:
self.bot = bot
@commands.group(name="pods", aliases=["pod"], invoke_without_command=True)
async def pods_cmd(self, ctx: commands.Context) -> None:
"""Commands for working with Kubernetes Pods."""
await ctx.send_help(ctx.command)
@pods_cmd.command(name="list", aliases=["ls"])
async def pods_list(self, ctx: commands.Context, namespace: str = "default") -> None:
"""List pods in the selected namespace (defaults to default)."""
pod_list = await pods.list_pods(namespace)
if len(pod_list.items) == 0:
return await ctx.send(
generate_error_message(description="No pods found, check the namespace exists.")
)
tables = [[]]
for pod in pod_list.items:
match pod.status.phase:
case "Running":
emote = "\N{LARGE GREEN CIRCLE}"
case "Pending":
emote = "\N{LARGE YELLOW CIRCLE}"
case "Succeeded":
emote = "\N{WHITE HEAVY CHECK MARK}"
case "Failed":
emote = "\N{CROSS MARK}"
case "Unknown":
emote = "\N{WHITE QUESTION MARK ORNAMENT}"
case _:
emote = "\N{BLACK QUESTION MARK ORNAMENT}"
time_human = humanize.naturaldelta(
datetime.now(tz=zoneinfo.ZoneInfo("UTC")) - pod.metadata.creation_timestamp
)
# we know that Linode formats names like "lke<cluster>-<pool>-<node>"
node_name = pod.spec.node_name.split("-")[2]
table_data = [
emote,
pod.metadata.name,
pod.status.phase,
pod.status.pod_ip,
node_name,
time_human,
pod.status.container_statuses[0].restart_count,
]
if len(tabulate_pod_data(tables[-1] + [table_data])) > MAX_MESSAGE_LENGTH:
tables.append([])
tables[-1].append(table_data)
else:
tables[-1].append(table_data)
await ctx.send(f"**Pods in namespace `{namespace}`**")
for table in tables:
await ctx.send(tabulate_pod_data(table))
return None
@pods_cmd.command(name="logs", aliases=["log", "tail"])
@commands.check(lambda ctx: ctx.channel.id == CONFIG.devops_channel_id)
async def pods_logs(
self, ctx: commands.Context, pod_name: str, namespace: str = "default", lines: int = 15
) -> None:
"""
Tail the logs of a pod in the selected namespace (defaults to default).
We also support the syntax of `deploy/<deployment-name>` to get the logs of the first pod associated with the deployment.
"""
if pod_name.startswith("deploy/"):
pod_names = await pods.get_pod_names_from_deployment(
namespace, pod_name.removeprefix("deploy/")
)
logger.debug(f"Resolved deployment pod name to {pod_names}")
else:
pod_names = [pod_name]
if pod_names is None:
return await ctx.send(
generate_error_message(description="No pods found for the provided deployment.")
)
for pod in pod_names:
try:
logs = await pods.tail_pod(namespace, pod, lines=lines)
except ApiException as e:
if e.status == 404: # noqa: PLR2004, 404 is a known error
return await ctx.send(
generate_error_message(
description="Pod or namespace not found, check the name."
)
)
return await ctx.send(generate_error_message(description=str(e)))
if len(logs) == 0:
return await ctx.send(
generate_error_message(description="No logs found for the pod.")
)
truncated = False
if len(logs) > MAX_MESSAGE_LENGTH - 100:
truncated = True
while len(logs) > MAX_MESSAGE_LENGTH - 100:
logs = logs[: logs.rfind("\n")]
message = f"**Logs for pod `{pod}` in namespace `{namespace}`**\n"
if truncated:
message += "`[Logs truncated]`\n"
message += "```"
message += logs
message += "```"
await ctx.send(message)
return None
async def setup(bot: KingArthur) -> None:
"""Add the extension to the bot."""
await bot.add_cog(Pods(bot))
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