Kubernetes HTTP活性プローブは、URLがなくても「接続が拒否されました」で失敗する
環境：
Kubernetes version: v1.16.3
OS: CentOS 7
Kernel: Linux k8s02-master01 3.10.0-1062.4.3.el7.x86_64 #1 SMP Wed Nov 13 23:58:53 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
何が起こったのか：
私はWordpressカスタムApache/Wordpressイメージから構築されたコンテナを実行するデプロイメントを持っています。イメージは80ではなくポート8080を公開しています（Dockerfile下） 。ポッドはTraefikリバースプロキシを介して世界に公開されています。すべてが活性または準備チェックなしで正常に動作します。ポッドは準備が整い、Wordpressは https：// www。 example.com/ 。
活性プローブと準備プローブを追加してみましたが、どちらも「接続が拒否されました」というメッセージで繰り返し失敗します。両方のプローブを削除してデプロイメントを再適用すると、再び機能します。これは、プローブが障害しきい値に達するまで機能します。このしきい値に達すると、コンテナーは無限の再起動ループに入り、アクセスできなくなります。
PODイベント：
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled <unknown> default-scheduler Successfully assigned development/blog-wordpress-5dbcd9c7c7-kdgpc to gg-k8s02-worker02
Normal Killing 16m (x2 over 17m) kubelet, gg-k8s02-worker02 Container blog-wordpress failed liveness probe, will be restarted
Normal Created 16m (x3 over 18m) kubelet, gg-k8s02-worker02 Created container blog-wordpress
Normal Started 16m (x3 over 18m) kubelet, gg-k8s02-worker02 Started container blog-wordpress
Normal Pulled 13m (x5 over 18m) kubelet, gg-k8s02-worker02 Container image "wordpress-test:test12" already present on machine
Warning Unhealthy 8m17s (x35 over 18m) kubelet, gg-k8s02-worker02 Liveness probe failed: Get http://10.244.3.83/: dial tcp 10.244.3.83:80: connect: connection refused
Warning BackOff 3m27s (x27 over 11m) kubelet, gg-k8s02-worker02 Back-off restarting failed container
PODログ：
WordPress not found in /var/www/html - copying now...
WARNING: /var/www/html is not empty! (copying anyhow)
Complete! WordPress has been successfully copied to /var/www/html
AH00558: Apache2: Could not reliably determine the server's fully qualified domain name, using 10.244.3.83. Set the 'ServerName' directive globally to suppress this message
AH00558: Apache2: Could not reliably determine the server's fully qualified domain name, using 10.244.3.83. Set the 'ServerName' directive globally to suppress this message
[Wed Dec 11 06:39:07.502247 2019] [mpm_prefork:notice] [pid 1] AH00163: Apache/2.4.38 (Debian) PHP/7.3.11 configured -- resuming normal operations
[Wed Dec 11 06:39:07.502323 2019] [core:notice] [pid 1] AH00094: Command line: 'Apache2 -D FOREGROUND'
10.244.3.1 - - [11/Dec/2019:06:39:18 +0000] "GET /index.php HTTP/1.1" 301 264 "-" "kube-probe/1.16"
10.244.3.1 - - [11/Dec/2019:06:39:33 +0000] "GET /index.php HTTP/1.1" 301 264 "-" "kube-probe/1.16"
10.244.3.1 - - [11/Dec/2019:06:39:48 +0000] "GET /index.php HTTP/1.1" 301 264 "-" "kube-probe/1.16"
10.244.3.1 - - [11/Dec/2019:06:40:03 +0000] "GET /index.php HTTP/1.1" 301 264 "-" "kube-probe/1.16"
10.244.3.1 - - [11/Dec/2019:06:40:18 +0000] "GET /index.php HTTP/1.1" 301 264 "-" "kube-probe/1.16"
DOCKERFILE（ "wordpress-test：test12"）：
FROM wordpress:5.2.4-Apache
RUN sed -i 's/Listen 80/Listen 8080/g' /etc/Apache2/ports.conf;
RUN sed -i 's/:80/:8080/g' /etc/Apache2/sites-enabled/000-default.conf;
# RUN sed -i 's/#ServerName www.example.com/ServerName localhost/g' /etc/Apache2/sites-enabled/000-default.conf;
EXPOSE 8080
CMD ["Apache2-foreground"]
導入：
apiVersion: apps/v1
kind: Deployment
metadata:
name: blog-wordpress
namespace: development
labels:
app: blog
spec:
selector:
matchLabels:
app: blog
tier: wordpress
replicas: 4
strategy:
type: RollingUpdate
rollingUpdate:
maxSurge: 2
maxUnavailable: 2
template:
metadata:
labels:
app: blog
tier: wordpress
spec:
volumes:
- name: blog-wordpress
persistentVolumeClaim:
claimName: blog-wordpress
containers:
- name: blog-wordpress
# image: wordpress:5.2.4-Apache
image: wordpress-test:test12
securityContext:
runAsUser: 65534
allowPrivilegeEscalation: false
capabilities:
add:
- "NET_ADMIN"
- "NET_BIND_SERVICE"
- "SYS_TIME"
resources:
requests:
cpu: "250m"
memory: "64Mi"
limits:
cpu: "500m"
memory: "128Mi"
ports:
- name: liveness-port
containerPort: 8080
readinessProbe:
initialDelaySeconds: 15
httpGet:
path: /index.php
port: 8080
timeoutSeconds: 15
periodSeconds: 15
failureThreshold: 5
livenessProbe:
initialDelaySeconds: 10
httpGet:
path: /index.php
port: 8080
timeoutSeconds: 10
periodSeconds: 15
failureThreshold: 5
env:
# Database
- name: WORDPRESS_DB_Host
value: blog-mysql
- name: WORDPRESS_DB_NAME
value: wordpress
- name: WORDPRESS_DB_USER
valueFrom:
secretKeyRef:
name: blog-mysql
key: username
- name: WORDPRESS_DB_PASSWORD
valueFrom:
secretKeyRef:
name: blog-mysql
key: password
- name: WORDPRESS_TABLE_PREFIX
value: wp_
- name: WORDPRESS_AUTH_KEY
valueFrom:
secretKeyRef:
name: blog-wordpress
key: auth-key
- name: WORDPRESS_SECURE_AUTH_KEY
valueFrom:
secretKeyRef:
name: blog-wordpress
key: secure-auth-key
- name: WORDPRESS_LOGGED_IN_KEY
valueFrom:
secretKeyRef:
name: blog-wordpress
key: logged-in-key
- name: WORDPRESS_NONCE_KEY
valueFrom:
secretKeyRef:
name: blog-wordpress
key: nonce-key
- name: WORDPRESS_AUTH_SALT
valueFrom:
secretKeyRef:
name: blog-wordpress
key: auth-salt
- name: WORDPRESS_SECURE_AUTH_SALT
valueFrom:
secretKeyRef:
name: blog-wordpress
key: secure-auth-salt
- name: WORDPRESS_LOGGED_IN_SALT
valueFrom:
secretKeyRef:
name: blog-wordpress
key: logged-in-salt
- name: WORDPRESS_NONCE_SALT
valueFrom:
secretKeyRef:
name: blog-wordpress
key: nonce-salt
- name: WORDPRESS_CONFIG_EXTRA
value: |
define('WPLANG', 'fr_FR');
define('WP_CACHE', false);
define('WP_MEMORY_LIMIT', '64M');
volumeMounts:
- name: blog-wordpress
mountPath: "/var/www/html/wp-content"
導入サービス：
apiVersion: v1
kind: Service
metadata:
name: blog-wordpress
namespace: development
labels:
app: blog
spec:
ports:
- protocol: TCP
port: 80
targetPort: 8080
selector:
app: blog
tier: wordpress
type: ClusterIP
TRAEFIK INGRESSROUTE：
##
# HTTP
##
apiVersion: traefik.containo.us/v1alpha1
kind: IngressRoute
metadata:
name: blog
namespace: development
spec:
entryPoints:
- http
routes:
- match: Host(`example.com`)
kind: Rule
services:
- name: blog-wordpress
port: 80
middlewares:
- name: redirect-to-https
namespace: kube-system
---
##
# HTTPS
##
apiVersion: traefik.containo.us/v1alpha1
kind: IngressRoute
metadata:
name: blog-https
namespace: development
spec:
entryPoints:
- https
routes:
- match: Host(`example.com`) && PathPrefix(`/`)
kind: Rule
services:
- name: blog-wordpress
port: 80
tls:
certResolver: letsencrypt
ありがとうございました！
WPは/の「クリーン」なURLにリダイレクトします。index.php部分を削除します