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Improved kubernetes error handling

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pull/448/head
James Wynn 2 years ago
parent 8887fcc3ee
commit 4fc6db49ca
8 changed files with 208 additions and 127 deletions
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2
src/components/widgets/longhorn/longhorn.jsx
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@ -1,6 +1,6 @@
import useSWR from "swr";
import { BiError } from "react-icons/bi";
import { i18n, useTranslation } from "next-i18next";
import { useTranslation } from "next-i18next";
import Node from "./node";

71
src/pages/api/kubernetes/stats/[...service].js
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@ -2,15 +2,18 @@ import { CoreV1Api, Metrics } from "@kubernetes/client-node";
import getKubeConfig from "../../../../utils/config/kubernetes";
import { parseCpu, parseMemory } from "../../../../utils/kubernetes/kubernetes-utils";
import createLogger from "../../../../utils/logger";
const logger = createLogger("kubernetesStatsService");
export default async function handler(req, res) {
const APP_LABEL = "app.kubernetes.io/name";
const APP_LABEL = "app.kubernetes.io/name";
const { service } = req.query;
const [namespace, appName] = service;
if (!namespace && !appName) {
res.status(400).send({
error: "kubernetes query parameters are required",
error: "kubernetes query parameters are required"
});
return;
}
@ -20,12 +23,23 @@ export default async function handler(req, res) {
const kc = getKubeConfig();
const coreApi = kc.makeApiClient(CoreV1Api);
const metricsApi = new Metrics(kc);
const podsResponse = await coreApi.listNamespacedPod(namespace, null, null, null, null, labelSelector);
const pods = podsResponse.body.items;
const podsResponse = await coreApi.listNamespacedPod(namespace, null, null, null, null, labelSelector)
.then((response) => response.body)
.catch((err) => {
logger.error("Error getting pods: %d %s %s", err.statusCode, err.body, err.response);
return null;
});
if (!podsResponse) {
res.status(500).send({
error: "Error communicating with kubernetes"
});
return;
}
const pods = podsResponse.items;
if (pods.length === 0) {
res.status(200).send({
error: "not found",
res.status(404).send({
error: "not found"
});
return;
}
@ -46,34 +60,43 @@ export default async function handler(req, res) {
const stats = await pods.map(async (pod) => {
let depMem = 0;
let depCpu = 0;
const podMetrics = await metricsApi.getPodMetrics(namespace, pod.metadata.name);
podMetrics.containers.forEach((container) => {
depMem += parseMemory(container.usage.memory);
depCpu += parseCpu(container.usage.cpu);
});
const podMetrics = await metricsApi.getPodMetrics(namespace, pod.metadata.name)
.then((response) => response)
.catch((err) => {
// 404 generally means that the metrics have not been populated yet
if (err.statusCode !== 404) {
logger.error("Error getting pod metrics: %d %s %s", err.statusCode, err.body, err.response);
}
return null;
});
if (podMetrics) {
podMetrics.containers.forEach((container) => {
depMem += parseMemory(container.usage.memory);
depCpu += parseCpu(container.usage.cpu);
});
}
return {
mem: depMem,
cpu: depCpu
}
}).reduce(async (finalStats, podStatPromise) => {
const podStats = await podStatPromise;
return {
mem: finalStats.mem + podStats.mem,
cpu: finalStats.cpu + podStats.cpu
};
});
}).reduce(async (finalStats, podStatPromise) => {
const podStats = await podStatPromise;
return {
mem: finalStats.mem + podStats.mem,
cpu: finalStats.cpu + podStats.cpu
};
});
stats.cpuLimit = cpuLimit;
stats.memLimit = memLimit;
stats.cpuUsage = stats.cpu / cpuLimit;
stats.memUsage = stats.mem / memLimit;
stats.cpuUsage = cpuLimit ? stats.cpu / cpuLimit : 0;
stats.memUsage = memLimit ? stats.mem / memLimit : 0;
res.status(200).json({
stats,
stats
});
} catch (e) {
console.log("error", e);
logger.error(e);
res.status(500).send({
error: "unknown error",
error: "unknown error"
});
}
}

23
src/pages/api/kubernetes/status/[...service].js
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@ -1,6 +1,9 @@
import { CoreV1Api } from "@kubernetes/client-node";
import getKubeConfig from "../../../../utils/config/kubernetes";
import createLogger from "../../../../utils/logger";
const logger = createLogger("kubernetesStatusService");
export default async function handler(req, res) {
const APP_LABEL = "app.kubernetes.io/name";
@ -18,11 +21,22 @@ export default async function handler(req, res) {
try {
const kc = getKubeConfig();
const coreApi = kc.makeApiClient(CoreV1Api);
const podsResponse = await coreApi.listNamespacedPod(namespace, null, null, null, null, labelSelector);
const pods = podsResponse.body.items;
const podsResponse = await coreApi.listNamespacedPod(namespace, null, null, null, null, labelSelector)
.then((response) => response.body)
.catch((err) => {
logger.error("Error getting pods: %d %s %s", err.statusCode, err.body, err.response);
return null;
});
if (!podsResponse) {
res.status(500).send({
error: "Error communicating with kubernetes"
});
return;
}
const pods = podsResponse.items;
if (pods.length === 0) {
res.status(200).send({
res.status(404).send({
error: "not found",
});
return;
@ -34,7 +48,8 @@ export default async function handler(req, res) {
res.status(200).json({
status
});
} catch {
} catch (e) {
logger.error(e);
res.status(500).send({
error: "unknown error",
});

114
src/pages/api/widgets/kubernetes.js
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@ -2,59 +2,79 @@ import { CoreV1Api, Metrics } from "@kubernetes/client-node";
import getKubeConfig from "../../../utils/config/kubernetes";
import { parseCpu, parseMemory } from "../../../utils/kubernetes/kubernetes-utils";
import createLogger from "../../../utils/logger";
const logger = createLogger("kubernetes-widget");
export default async function handler(req, res) {
const { type } = req.query;
const kc = getKubeConfig();
const coreApi = kc.makeApiClient(CoreV1Api);
const metricsApi = new Metrics(kc);
const nodes = await coreApi.listNode();
const nodeCapacity = new Map();
let cpuTotal = 0;
let cpuUsage = 0;
let memTotal = 0;
let memUsage = 0;
nodes.body.items.forEach((node) => {
nodeCapacity.set(node.metadata.name, node.status.capacity);
cpuTotal += Number.parseInt(node.status.capacity.cpu, 10);
memTotal += parseMemory(node.status.capacity.memory);
});
const nodeMetrics = await metricsApi.getNodeMetrics();
const nodeUsage = new Map();
nodeMetrics.items.forEach((metrics) => {
nodeUsage.set(metrics.metadata.name, metrics.usage);
cpuUsage += parseCpu(metrics.usage.cpu);
memUsage += parseMemory(metrics.usage.memory);
});
if (type === "cpu") {
return res.status(200).json({
cpu: {
usage: (cpuUsage / cpuTotal) * 100,
load: cpuUsage
}
try {
const kc = getKubeConfig();
const coreApi = kc.makeApiClient(CoreV1Api);
const metricsApi = new Metrics(kc);
const nodes = await coreApi.listNode()
.then((response) => response.body)
.catch((error) => {
logger.error("Error getting ingresses: %d %s %s", error.statusCode, error.body, error.response);
return null;
});
if (!nodes) {
return res.status(500).send({
error: "unknown error"
});
}
const nodeCapacity = new Map();
let cpuTotal = 0;
let cpuUsage = 0;
let memTotal = 0;
let memUsage = 0;
nodes.items.forEach((node) => {
nodeCapacity.set(node.metadata.name, node.status.capacity);
cpuTotal += Number.parseInt(node.status.capacity.cpu, 10);
memTotal += parseMemory(node.status.capacity.memory);
});
}
if (type === "memory") {
const SCALE_MB = 1024 * 1024;
const usedMemMb = memUsage / SCALE_MB;
const totalMemMb = memTotal / SCALE_MB;
const freeMemMb = totalMemMb - usedMemMb;
return res.status(200).json({
memory: {
usedMemMb,
freeMemMb,
totalMemMb
}
const nodeMetrics = await metricsApi.getNodeMetrics();
const nodeUsage = new Map();
nodeMetrics.items.forEach((metrics) => {
nodeUsage.set(metrics.metadata.name, metrics.usage);
cpuUsage += parseCpu(metrics.usage.cpu);
memUsage += parseMemory(metrics.usage.memory);
});
}
return res.status(400).json({
error: "invalid type"
});
if (type === "cpu") {
return res.status(200).json({
cpu: {
usage: (cpuUsage / cpuTotal) * 100,
load: cpuUsage
}
});
}
if (type === "memory") {
const SCALE_MB = 1024 * 1024;
const usedMemMb = memUsage / SCALE_MB;
const totalMemMb = memTotal / SCALE_MB;
const freeMemMb = totalMemMb - usedMemMb;
return res.status(200).json({
memory: {
usedMemMb,
freeMemMb,
totalMemMb
}
});
}
return res.status(400).json({
error: "invalid type"
});
} catch (e) {
logger.error("exception %s", e);
return res.status(500).send({
error: "unknown error"
});
}
}

2
src/utils/config/api-response.js
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@ -64,7 +64,7 @@ export async function servicesResponse() {
try {
discoveredKubernetesServices = cleanServiceGroups(await servicesFromKubernetes());
} catch (e) {
console.error("Failed to discover services, please check docker.yaml for errors or remove example entries.");
console.error("Failed to discover services, please check kubernetes.yaml for errors or remove example entries.");
if (e) console.error(e);
discoveredKubernetesServices = [];
}

105
src/utils/config/service-helpers.js
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@ -6,10 +6,13 @@ import Docker from "dockerode";
import * as shvl from "shvl";
import { NetworkingV1Api } from "@kubernetes/client-node";
import createLogger from "utils/logger";
import checkAndCopyConfig from "utils/config/config";
import getDockerArguments from "utils/config/docker";
import getKubeConfig from "utils/config/kubernetes";
const logger = createLogger("service-helpers");
export async function servicesFromConfig() {
checkAndCopyConfig("services.yaml");
@ -105,54 +108,80 @@ export async function servicesFromDocker() {
return mappedServiceGroups;
}
function getUrlFromIngress(ingress) {
let url = ingress.metadata.annotations['homepage/url'];
if(!url) {
const host = ingress.spec.rules[0].host;
const path = ingress.spec.rules[0].http.paths[0].path;
const schema = ingress.spec.tls ? 'https' : 'http';
url = `${schema}://${host}${path}`;
}
return url;
}
export async function servicesFromKubernetes() {
checkAndCopyConfig("kubernetes.yaml");
const kc = getKubeConfig();
const networking = kc.makeApiClient(NetworkingV1Api);
const ingressResponse = await networking.listIngressForAllNamespaces(null, null, null, "homepage/enabled=true");
const services = ingressResponse.body.items.map((ingress) => {
const constructedService = {
app: ingress.metadata.name,
namespace: ingress.metadata.namespace,
href: `https://${ingress.spec.rules[0].host}`,
name: ingress.metadata.annotations['homepage/name'],
group: ingress.metadata.annotations['homepage/group'],
icon: ingress.metadata.annotations['homepage/icon'],
description: ingress.metadata.annotations['homepage/description']
};
Object.keys(ingress.metadata.labels).forEach((label) => {
if (label.startsWith("homepage/widget/")) {
shvl.set(constructedService, label.replace("homepage/widget/", ""), ingress.metadata.labels[label]);
}
try {
const kc = getKubeConfig();
const networking = kc.makeApiClient(NetworkingV1Api);
const ingressList = await networking.listIngressForAllNamespaces(null, null, null, "homepage/enabled=true")
.then((response) => response.body)
.catch((error) => {
logger.error("Error getting ingresses: %d %s %s", error.statusCode, error.body, error.response);
return null;
});
if (!ingressList) {
return [];
}
const services = ingressList.items.map((ingress) => {
const constructedService = {
app: ingress.metadata.name,
namespace: ingress.metadata.namespace,
href: getUrlFromIngress(ingress),
name: ingress.metadata.annotations['homepage/name'] || ingress.metadata.name,
group: ingress.metadata.annotations['homepage/group'] || "Kubernetes",
icon: ingress.metadata.annotations['homepage/icon'] || '',
description: ingress.metadata.annotations['homepage/description'] || ''
};
Object.keys(ingress.metadata.annotations).forEach((annotation) => {
if (annotation.startsWith("homepage/widget/")) {
shvl.set(constructedService, annotation.replace("homepage/widget/", ""), ingress.metadata.annotations[annotation]);
}
});
return constructedService;
});
return constructedService;
});
const mappedServiceGroups = [];
const mappedServiceGroups = [];
services.forEach((serverService) => {
let serverGroup = mappedServiceGroups.find((searchedGroup) => searchedGroup.name === serverService.group);
if (!serverGroup) {
mappedServiceGroups.push({
name: serverService.group,
services: [],
});
serverGroup = mappedServiceGroups[mappedServiceGroups.length - 1];
}
services.forEach((serverService) => {
let serverGroup = mappedServiceGroups.find((searchedGroup) => searchedGroup.name === serverService.group);
if (!serverGroup) {
mappedServiceGroups.push({
name: serverService.group,
services: [],
});
serverGroup = mappedServiceGroups[mappedServiceGroups.length - 1];
}
const { name: serviceName, group: serverServiceGroup, ...pushedService } = serverService;
const result = {
name: serviceName,
...pushedService,
};
const { name: serviceName, group: serverServiceGroup, ...pushedService } = serverService;
const result = {
name: serviceName,
...pushedService,
};
serverGroup.services.push(result);
});
serverGroup.services.push(result);
});
return mappedServiceGroups;
return mappedServiceGroups;
} catch (e) {
logger.error(e);
throw e;
}
}
export function cleanServiceGroups(groups) {

2
src/utils/kubernetes/kubernetes-utils.js
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@ -2,7 +2,6 @@ export function parseCpu(cpuStr) {
const unitLength = 1;
const base = Number.parseInt(cpuStr, 10);
const units = cpuStr.substring(cpuStr.length - unitLength);
// console.log(Number.isNaN(Number(units)), cpuStr, base, units);
if (Number.isNaN(Number(units))) {
switch (units) {
case 'n':
@ -23,7 +22,6 @@ export function parseMemory(memStr) {
const unitLength = (memStr.substring(memStr.length - 1) === 'i' ? 2 : 1);
const base = Number.parseInt(memStr, 10);
const units = memStr.substring(memStr.length - unitLength);
// console.log(Number.isNaN(Number(units)), memStr, base, units);
if (Number.isNaN(Number(units))) {
switch (units) {
case 'Ki':

16
src/widgets/kubernetes/component.jsx
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@ -32,23 +32,19 @@ export default function Component({ service }) {
<Container service={service}>
<Block label="docker.cpu" />
<Block label="docker.mem" />
<Block label="docker.rx" />
<Block label="docker.tx" />
</Container>
);
}
const network = statsData.stats?.networks?.eth0 || statsData.stats?.networks?.network;
return (
<Container service={service}>
<Block label="docker.cpu" value={t("common.percent", { value: statsData.stats.cpuUsage })} />
<Block label="docker.mem" value={t("common.bytes", { value: statsData.stats.mem })} />
{network && (
<>
<Block label="docker.rx" value={t("common.bytes", { value: network.rx_bytes })} />
<Block label="docker.tx" value={t("common.bytes", { value: network.tx_bytes })} />
</>
{statsData.stats.cpuLimit && (
<Block label="docker.cpu" value={t("common.percent", { value: statsData.stats.cpuUsage })} />
) || (
<Block label="docker.cpu" value={t("common.number", { value: statsData.stats.cpu, maximumFractionDigits: 4 })}
/>
)}
<Block label="docker.mem" value={t("common.bytes", { value: statsData.stats.mem })} />
</Container>
);
}

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