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Kong系列-04-Helm安装Kong 1.3.0 with PostgreSQL and with Ingress Controller
系统环境。
kubeadm version
kubeadm version: &version.Info{Major:"1", Minor:"16", GitVersion:"v1.16.4", GitCommit:"224be7bdce5a9dd0c2fd0d46b83865648e2fe0ba", GitTreeState:"clean", BuildDate:"2019-12-11T12:44:45Z", GoVersion:"go1.12.12", Compiler:"gc", Platform:"linux/amd64"}
helm version
version.BuildInfo{Version:"v3.0.1", GitCommit:"7c22ef9ce89e0ebeb7125ba2ebf7d421f3e82ffa", GitTreeState:"clean", GoVersion:"go1.13.4"}
helm repo list
NAME URL
stable https://kubernetes-charts.storage.googleapis.com
aliyuncs https://apphub.aliyuncs.com
bitnami https://charts.bitnami.com/bitnami由于需要安装PostgreSQL数据库，需要使用StorageClass动态存储卷，我们采用NFS共享文件系统来搭建共享存储卷。NFS服务器的安装请参见nfs v4安装和使用-CentOS。
NFS服务器安装完成后，为Kong创建共享文件系统。
mkdir /data/kong -p
chmod 777 /data/kong/
vi /etc/exports
/data/kong 192.168.1.0/24(sync,rw,no_root_squash,no_subtree_check)
exportfs -r
showmount -e 192.168.1.80
Export list for nfs:
/data/kong 192.168.1.0/24在Kubernetes集群所有节点安装nfs客户端。
yum install -y nfs-utils我们通过helm安装nfs-cleint-provisioner。
helm install nfs-provisioner stable/nfs-client-provisioner --set nfs.server=192.168.1.80 --set nfs.path=/data/kong
kubectl get sc
NAME PROVISIONER AGE
nfs-client cluster.local/nfs-provisioner-nfs-client-provisioner 61m
kubectl get all
NAME READY STATUS RESTARTS AGE
pod/nfs-provisioner-nfs-client-provisioner-77678db49f-xrq6w 1/1 Running 2 84m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/kubernetes ClusterIP 10.1.0.1 <none> 443/TCP 17h
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/nfs-provisioner-nfs-client-provisioner 1/1 1 1 84m
NAME DESIRED CURRENT READY AGE
replicaset.apps/nfs-provisioner-nfs-client-provisioner-77678db49f 1 1 1 84m查找Kong Chart，并安装。由于从Kong Chart 0.27.0开始，缺省安装为DB-less方式，此处使用0.26.1版本安装。
helm search repo kong
NAME CHART VERSION APP VERSION DESCRIPTION
aliyuncs/kong 0.27.0 1.3 The Cloud-Native Ingress and Service Mesh for A...
stable/kong 0.28.0 1.3 The Cloud-Native Ingress and Service Mesh for A...
# admin.useTLS=false admin端口不使用tls
# ingressController.enabled-true 0.26.1版本缺省不启用Ingress Controller
# postgresql.persistence.storageClass="nfs-client" 使用nfs创建的动态存储卷，注意此处值为安装nfs-provisioner时的名称。或者kubectl ge sc的名称。
# postgresql.persistence.size=1Gi 缺省的存储卷size太大，此处改小一些。
helm install gateway stable/kong --version 0.26.1 \
--set admin.useTLS=false \
--set admin.nodePort=32444 \
--set proxy.http.nodePort=32080 \
--set proxy.tls.nodePort=32443 \
--set replicaCount=2 \
--set ingressController.enabled=true \
--set postgresql.persistence.storageClass="nfs-client" \
--set postgresql.persistence.size=1Gi
NAME: gateway
LAST DEPLOYED: Sun Dec 15 15:51:37 2019
NAMESPACE: default
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
1. Kong Admin can be accessed inside the cluster using:
DNS=gateway-kong-admin.default.svc.cluster.local
PORT=8444
To connect from outside the K8s cluster:
HOST=$(kubectl get nodes --namespace default -o jsonpath='{.items[0].status.addresses[0].address}')
PORT=$(kubectl get svc --namespace default gateway-kong-admin -o jsonpath='{.spec.ports[0].nodePort}')
2. Kong Proxy can be accessed inside the cluster using:
DNS=gateway-kong-proxy.default.svc.cluster.localPORT=443To connect from outside the K8s cluster:
HOST=$(kubectl get nodes --namespace default -o jsonpath='{.items[0].status.addresses[0].address}')
PORT=$(kubectl get svc --namespace default gateway-kong-proxy -o jsonpath='{.spec.ports[0].nodePort}')查看各对象状态。
kubectl get all
NAME READY STATUS RESTARTS AGE
pod/gateway-kong-79498b67b7-plmlm 2/2 Running 2 4m24s
pod/gateway-kong-79498b67b7-zcfh6 2/2 Running 2 4m24s
pod/gateway-kong-init-migrations-5qdxc 0/1 Completed 0 4m24s
pod/gateway-postgresql-0 1/1 Running 0 4m24s
pod/nfs-provisioner-nfs-client-provisioner-77678db49f-xrq6w 1/1 Running 2 105m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/gateway-kong-admin NodePort 10.1.6.70 <none> 8444:32444/TCP 4m24s
service/gateway-kong-proxy NodePort 10.1.232.237 <none> 80:32080/TCP,443:32443/TCP 4m24s
service/gateway-postgresql ClusterIP 10.1.161.34 <none> 5432/TCP 4m24s
service/gateway-postgresql-headless ClusterIP None <none> 5432/TCP 4m24s
service/kubernetes ClusterIP 10.1.0.1 <none> 443/TCP 18h
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/gateway-kong 2/2 2 2 4m24s
deployment.apps/nfs-provisioner-nfs-client-provisioner 1/1 1 1 105m
NAME DESIRED CURRENT READY AGE
replicaset.apps/gateway-kong-79498b67b7 2 2 2 4m24s
replicaset.apps/nfs-provisioner-nfs-client-provisioner-77678db49f 1 1 1 105m
NAME READY AGE
statefulset.apps/gateway-postgresql 1/1 4m24s
NAME COMPLETIONS DURATION AGE
job.batch/gateway-kong-init-migrations 1/1 64s 4m24s
kubectl get deploy -o wide
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
gateway-kong 2/2 2 2 9m34s ingress-controller,kong kong-docker-kubernetes-ingress-controller.bintray.io/kong-ingress-controller:0.6.0,kong:1.3 app=kong,component=app,release=gateway
kubectl get pvc
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
data-gateway-postgresql-0 Bound pvc-2c8a72b2-f649-4c1f-9ba5-afc89e184796 1Gi RWO nfs-client 4m52s
kubectl get pv
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
pvc-2c8a72b2-f649-4c1f-9ba5-afc89e184796 1Gi RWO Delete Bound default/data-gateway-postgresql-0 nfs-client 4m53s
#在nfs服务器端。
cd /data/kong
ls
default-data-gateway-postgresql-0-pvc-2c8a72b2-f649-4c1f-9ba5-afc89e184796在Kubernetes下部署的有数据库的Kong，Kong定义了多个自定义资源CRDs，Kong通过这些CRDs定义路由、插件等配置，这些配置数据通过Kubernetes API转发给Kong Ingress Controller，并通过控制平面将数据保存在数据库中，数据平面从数据库中读取配置信息并缓存，Kong继而控制客户端的请求流量。
CRDs数据应该存放在Kubernetes的etcd数据库中，这些数据通过Ingress Controller转换为Kong的数据库配置方式，Kong数据平面从数据库中读取配置数据。现在这种方式有些复杂，感觉为了复用原来的Kong和数据库同步数据的方式，而且无数据库方式不支持传统的管理Rest API方式。Kubernetes并支持Ingress Controller的方式下支持数据库做持久存储有些多此一举。应该直接无数据库比较合理。当然Kong已经明确推荐在Kubernetes下采用无数据库方式。
无数据方式不支持传统的管理Rest API。为了向后兼容，Kubernetes保留了数据库的方式。
从上面也可以看出Kong Pod中有两个容器：ingress-controller、kong。
如果要卸载Kong，执行如下命令：
helm uninstall gateway
kubectl delete pvc data-gateway-postgresql-0
在NFS服务器端，执行：
cd /data/kong
rm -rf *
Kong的admin服务对外的nodePort为32444，proxy服务对外nodePort为32080(http)/32443(https)，如果都能访问，表示Kong安装成功。
curl http://192.168.1.55:32444 -s | python -m json.tool
{
"configuration": {
"admin_acc_logs": "/usr/local/kong/logs/admin_access.log",
"admin_access_log": "/dev/stdout",
"admin_error_log": "/dev/stderr",
"admin_listen": [
"0.0.0.0:8444"
],
"admin_listeners": [
{
"bind": false,
"deferred": false,
"http2": false,
"ip": "0.0.0.0",
"listener": "0.0.0.0:8444",
"port": 8444,
"proxy_protocol": false,
"reuseport": false,
"ssl": false,
"transparent": false
}
],
"admin_ssl_cert_default": "/usr/local/kong/ssl/admin-kong-default.crt",
"admin_ssl_cert_key_default": "/usr/local/kong/ssl/admin-kong-default.key",
"admin_ssl_enabled": false,
"anonymous_reports": true,
"cassandra_consistency": "ONE",
"cassandra_contact_points": [
"127.0.0.1"
],
"cassandra_data_centers": [
"dc1:2",
"dc2:3"
],
"cassandra_keyspace": "kong",
"cassandra_lb_policy": "RequestRoundRobin",
"cassandra_port": 9042,
"cassandra_repl_factor": 1,
"cassandra_repl_strategy": "SimpleStrategy",
"cassandra_schema_consensus_timeout": 10000,
"cassandra_ssl": false,
"cassandra_ssl_verify": false,
"cassandra_timeout": 5000,
"cassandra_username": "kong",
"client_body_buffer_size": "8k",
"client_max_body_size": "0",
"client_ssl": false,
"client_ssl_cert_default": "/usr/local/kong/ssl/kong-default.crt",
"client_ssl_cert_key_default": "/usr/local/kong/ssl/kong-default.key",
"database": "postgres",
"db_cache_ttl": 0,
"db_cache_warmup_entities": [
"services",
"plugins"
],
"db_resurrect_ttl": 30,
"db_update_frequency": 5,
"db_update_propagation": 0,
"dns_error_ttl": 1,
"dns_hostsfile": "/etc/hosts",
"dns_no_sync": false,
"dns_not_found_ttl": 30,
"dns_order": [
"LAST",
"SRV",
"A",
"CNAME"
],
"dns_resolver": {},
"dns_stale_ttl": 4,
"enabled_headers": {
"Server": true,
"Via": true,
"X-Kong-Proxy-Latency": true,
"X-Kong-Upstream-Latency": true,
"X-Kong-Upstream-Status": false,
"latency_tokens": true,
"server_tokens": true
},
"error_default_type": "text/plain",
"headers": [
"server_tokens",
"latency_tokens"
],
"kong_env": "/usr/local/kong/.kong_env",
"loaded_plugins": {
"acl": true,
"aws-lambda": true,
"azure-functions": true,
"basic-auth": true,
"bot-detection": true,
"correlation-id": true,
"cors": true,
"datadog": true,
"file-log": true,
"hmac-auth": true,
"http-log": true,
"ip-restriction": true,
"jwt": true,
"key-auth": true,
"kubernetes-sidecar-injector": true,
"ldap-auth": true,
"loggly": true,
"oauth2": true,
"post-function": true,
"pre-function": true,
"prometheus": true,
"proxy-cache": true,
"rate-limiting": true,
"request-size-limiting": true,
"request-termination": true,
"request-transformer": true,
"response-ratelimiting": true,
"response-transformer": true,
"session": true,
"statsd": true,
"syslog": true,
"tcp-log": true,
"udp-log": true,
"zipkin": true
},
"log_level": "notice",
"lua_package_cpath": "",
"lua_package_path": "/opt/?.lua;;",
"lua_socket_pool_size": 30,
"lua_ssl_verify_depth": 1,
"mem_cache_size": "128m",
"nginx_acc_logs": "/usr/local/kong/logs/access.log",
"nginx_admin_directives": {},
"nginx_conf": "/usr/local/kong/nginx.conf",
"nginx_daemon": "off",
"nginx_err_logs": "/usr/local/kong/logs/error.log",
"nginx_http_directives": [
{
"name": "ssl_protocols",
"value": "TLSv1.1 TLSv1.2 TLSv1.3"
},
{
"name": "include",
"value": "/kong/servers.conf"
},
{
"name": "lua_shared_dict",
"value": "prometheus_metrics 5m"
}
],
"nginx_http_include": "/kong/servers.conf",
"nginx_http_ssl_protocols": "TLSv1.1 TLSv1.2 TLSv1.3",
"nginx_http_upstream_directives": [
{
"name": "keepalive_timeout",
"value": "60s"
},
{
"name": "keepalive_requests",
"value": "100"
},
{
"name": "keepalive",
"value": "60"
}
],
"nginx_http_upstream_keepalive": "60",
"nginx_http_upstream_keepalive_requests": "100",
"nginx_http_upstream_keepalive_timeout": "60s",
"nginx_kong_conf": "/usr/local/kong/nginx-kong.conf",
"nginx_kong_stream_conf": "/usr/local/kong/nginx-kong-stream.conf",
"nginx_optimizations": true,
"nginx_pid": "/usr/local/kong/pids/nginx.pid",
"nginx_proxy_directives": {},
"nginx_sproxy_directives": {},
"nginx_stream_directives": {},
"nginx_worker_processes": "1",
"origins": {},
"pg_database": "kong",
"pg_host": "gateway-postgresql",
"pg_max_concurrent_queries": 0,
"pg_password": "******",
"pg_port": 5432,
"pg_semaphore_timeout": 60000,
"pg_ssl": false,
"pg_ssl_verify": false,
"pg_timeout": 5000,
"pg_user": "kong",
"plugins": [
"bundled"
],
"prefix": "/usr/local/kong",
"proxy_access_log": "/dev/stdout",
"proxy_error_log": "/dev/stderr",
"proxy_listen": [
"0.0.0.0:8000",
"0.0.0.0:8443 ssl"
],
"proxy_listeners": [
{
"bind": false,
"deferred": false,
"http2": false,
"ip": "0.0.0.0",
"listener": "0.0.0.0:8000",
"port": 8000,
"proxy_protocol": false,
"reuseport": false,
"ssl": false,
"transparent": false
},
{
"bind": false,
"deferred": false,
"http2": false,
"ip": "0.0.0.0",
"listener": "0.0.0.0:8443 ssl",
"port": 8443,
"proxy_protocol": false,
"reuseport": false,
"ssl": true,
"transparent": false
}
],
"proxy_ssl_enabled": true,
"real_ip_header": "X-Real-IP",
"real_ip_recursive": "off",
"router_consistency": "strict",
"ssl_cert": "/usr/local/kong/ssl/kong-default.crt",
"ssl_cert_csr_default": "/usr/local/kong/ssl/kong-default.csr",
"ssl_cert_default": "/usr/local/kong/ssl/kong-default.crt",
"ssl_cert_key": "/usr/local/kong/ssl/kong-default.key",
"ssl_cert_key_default": "/usr/local/kong/ssl/kong-default.key",
"ssl_cipher_suite": "modern",
"ssl_ciphers": "ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256",
"ssl_preread_enabled": true,
"stream_listen": [
"off"
],
"stream_listeners": {},
"trusted_ips": {},
"upstream_keepalive": 60
},
"hostname": "gateway-kong-79498b67b7-zcfh6",
"lua_version": "LuaJIT 2.1.0-beta3",
"node_id": "524eb7e9-5903-4577-8088-a075e35a779c",
"plugins": {
"available_on_server": {
"acl": true,
"aws-lambda": true,
"azure-functions": true,
"basic-auth": true,
"bot-detection": true,
"correlation-id": true,
"cors": true,
"datadog": true,
"file-log": true,
"hmac-auth": true,
"http-log": true,
"ip-restriction": true,
"jwt": true,
"key-auth": true,
"kubernetes-sidecar-injector": true,
"ldap-auth": true,
"loggly": true,
"oauth2": true,
"post-function": true,
"pre-function": true,
"prometheus": true,
"proxy-cache": true,
"rate-limiting": true,
"request-size-limiting": true,
"request-termination": true,
"request-transformer": true,
"response-ratelimiting": true,
"response-transformer": true,
"session": true,
"statsd": true,
"syslog": true,
"tcp-log": true,
"udp-log": true,
"zipkin": true
},
"enabled_in_cluster": []
},
"prng_seeds": {
"pid: 1": 717133147233,
"pid: 31": 175771461992
},
"tagline": "Welcome to kong",
"timers": {
"pending": 7,
"running": 0
},
"version": "1.3.0"
}
curl -i http://192.168.1.55:32080
HTTP/1.1 404 Not Found
Date: Sun, 15 Dec 2019 08:17:00 GMT
Content-Type: application/json; charset=utf-8
Connection: keep-alive
Content-Length: 48
Server: kong/1.3.0
{"message":"no Route matched with those values"}
curl -i -k https://192.168.1.55:32443
HTTP/1.1 404 Not Found
Date: Sun, 15 Dec 2019 08:19:28 GMT
Content-Type: application/json; charset=utf-8
Connection: keep-alive
Content-Length: 48
Server: kong/1.3.0
{"message":"no Route matched with those values"}安装完毕。
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