tutorial：https://developer.lightbend.com/guides/lagom-kubernetes-k8s-deploy-microservices/

一、harbor deployment:

https://blog.frognew.com/2017/06/install-harbor.html

#harbor compose

wget https://github.com/vmware/harbor/releases/download/v1.1.2/harbor-offline-installer-v1.1.2.tgz

tar -zxvf harbor-offline-installer-v1.1.2.tgz

cd harbor/
ls
common docker-compose.notary.yml docker-compose.yml harbor_1_1_0_template harbor.cfg harbor.v1.1.2.tar.gz install.sh LICENSE NOTICE prepare upgrade

修改harbor.cfg：

#或者指定域名 如 hostname = harbor.myCompany.com
hostname = 192.168.61.11

二、harbor deployment

# habor
wget https://github.com/vmware/harbor/releases/download/v1.1.2/harbor-offline-installer-v1.1.2.tgz
tar -zxvf harbor-offline-installer-v1.1.2.tgz
cd harbor
vi harbor.cfg

change the domain name, https, password,

default user name: admin

hostname = harbor.xx.xxx.com

harbor_admin_password = Xxxxxxx

三、https deployment

# https(input the domain name and ip)
cd https
# 这是一个自动生成证书的工具
./lc-tlscert
mkdir -p /data/cert/
cp server.* /data/cert/

./install.sh

四、client

client

vi /etc/hosts

add 10.0..xxx harbor.xx.xxx.com

docker client import *.crt

mkdir -p /usr/share/ca-certificates/extra
scp root@10.0..xxx:/root/harbor/https/server.crt /usr/share/ca-certificates/extra/
dpkg-reconfigure ca-certificates
systemctl restart docker

# before push
docker login -u admin -p xxxxx harbor.xx.xxx.com

在客户端将harbor的hostname添加到 /etc/hosts中，在本地创建文件夹，拷贝证书， depackage， 然后重启本地docker -》 登陆docker

# change image pull policy
Always

五、在本地将工程publish到harbor

sbt -DbuildTarget=kubernetes clean docker:publish

build.sbt中需要修改

lazy val friendImpl = project("friend-impl")
.enablePlugins(LagomJava)
.settings(
version := buildVersion,
version in Docker := buildVersion,
dockerBaseImage := "openjdk:8-jre-alpine",
dockerRepository := Some(BuildTarget.dockerRepository),
dockerUpdateLatest := true,
dockerEntrypoint ++= """-Dhttp.address="$(eval "echo $FRIENDSERVICE_BIND_IP")" -Dhttp.port="$(eval "echo $FRIENDSERVICE_BIND_PORT")" -Dakka.remote.netty.tcp.hostname="$(eval "echo $AKKA_REMOTING_HOST")" -Dakka.remote.netty.tcp.bind-hostname="$(eval "echo $AKKA_REMOTING_BIND_HOST")" -Dakka.remote.netty.tcp.port="$(eval "echo $AKKA_REMOTING_PORT")" -Dakka.remote.netty.tcp.bind-port="$(eval "echo $AKKA_REMOTING_BIND_PORT")" $(IFS=','; I=0; for NODE in $AKKA_SEED_NODES; do echo "-Dakka.cluster.seed-nodes.$I=akka.tcp://friendservice@$NODE"; I=$(expr $I + 1); done)""".split(" ").toSeq,
dockerCommands :=
dockerCommands.value.flatMap {
case ExecCmd("ENTRYPOINT", args @ _*) => Seq(Cmd("ENTRYPOINT", args.mkString(" ")))
case c @ Cmd("FROM", _) => Seq(c, ExecCmd("RUN", "/bin/sh", "-c", "apk add --no-cache bash && ln -sf /bin/bash /bin/sh"))
case v => Seq(v)
},
resolvers += bintrayRepo("hajile", "maven"),
resolvers += bintrayRepo("hseeberger", "maven"),
libraryDependencies ++= Seq(
lagomJavadslPersistenceCassandra,
lagomJavadslTestKit
)
)
.settings(BuildTarget.additionalSettings)
.settings(lagomForkedTest

dockerRepository的值设置成publishTo的目标，比如： harbor.xx.xxx.com/chirper

六、kubenets拉取image
注意：上述在master节点做的CA工作，在slave节点上也要做，另外slave节点上也需要做hosts的配置

edit /etc/hosts

cd lagom-java-chirper-example/deploy/kubernetes/resources/chirper

kubectl create -f friend-impl-service.json

kubectl create -f friend-impl-statefulset.json

如果出现

2015/07/21 11:11:00 Get https://kubernetes.default.svc.cluster.local/api/v1/nodes: dial tcp: lookup kubernetes.default.svc.cluster.local: no such host

 这类错误，可以

vim /etc/hosts 10.0..xxx（harbor） harbor
vim /etc/resolv.conf 114.114.114.114 （修改至harbor的url）

七、kubenetes deployment：

ref: https://blog.frognew.com/2017/09/kubeadm-install-kubernetes-1.8.html

# 0. Verify the mac address and product_uuid

ifconfig -a

cat /sys/class/dmi/id/product_uuid

# 1. Turn off swap

swapoff -a

vi /etc/fstab

vi /etc/hosts

10.0.0.56 master.dev.xx.xxx.com

10.0.0.51 slave01.dev.xx.xxx.com

10.0.0.52 slave02.dev.xx.xxx.com

10.0.0.53 slave03.dev.xx.xxx.com

#swap line

# 2. Docker

apt install -y docker.io

cat << EOF > /etc/docker/daemon.json

{

"exec-opts": ["native.cgroupdriver=cgroupfs"]

}

EOF

? service docker restart

# 3. Kubeadm, Kubectl, Kubelet

apt update && apt install -y apt-transport-https

curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -

cat </etc/apt/sources.list.d/kubernetes.list

deb http://apt.kubernetes.io/ kubernetes-xenial main

EOF

apt update

apt install -y kubelet kubeadm kubectl

# 4. Init. Take the token!!!

vi ~/.profile

export KUBECONFIG=/etc/kubernetes/admin.conf

./init.sh

# 5. Flannel

# copy portmap to master and all slaves

cp flannel/portmap /opt/cni/bin

kubectl apply -f flannel/kube-flannel.yml

# 6. Dashboard

kubectl create -f dashboard/kubernetes-dashboard.yaml

kubectl create -f dashboard/kubernetes-dashboard-admin.rbac.yaml

kubectl create -f dashboard/grafana.yaml

kubectl create -f dashboard/influxdb.yaml

kubectl create -f dashboard/heapster.yaml

kubectl create -f dashboard/heapster-rbac.yaml

#7.

kubectl get pod --all-namespaces -o wide

找出dashboard 的ip

如：

kube-system   kubernetes-dashboard-7486b894c6-4rhfn    1/1       Running   0          1h        10.244.0.3   k8s-dev-master

./rinetd -c  10.0.0.56 8443 (target ip)  10.244.0.3 8443 (dashboard ip)

如果：rinetd: couldn't bind to address

关闭rinetd重新run即可

pkill rinetd

集群清理，不管master还是slave 都是：

kubeadm reset
ifconfig cni0 down
ip link delete cni0
ifconfig flannel.1 down
ip link delete flannel.1
rm -rf /var/lib/cni/

查看kubernete-dashboard-admin的token:

根据第一句命令查看token，把token写入第二句

kubectl -n kube-system get secret | grep kubernetes-dashboard-admin
kubernetes-dashboard-admin-token-pfss5   kubernetes.io/service-account-token   3         14s

kubectl describe -n kube-system secret/kubernetes-dashboard-admin-token-pfss5

八、deploy chirper-ingress

kubectl create -f /deploy/kubernetes/resources/nginx/chirper-ingress.json

九、set up static cassandra

在impl的application.conf中加入

cassandra.default {

## list the contact points  here

contact-points = ["10.0.0.58", "23.51.143.11"]

## override Lagom’s ServiceLocator-based ConfigSessionProvider

session-provider = akka.persistence.cassandra.ConfigSessionProvider

}

cassandra-journal {

contact-points = ${cassandra.default.contact-points}

session-provider = ${cassandra.default.session-provider}

}

cassandra-snapshot-store {

contact-points = ${cassandra.default.contact-points}

session-provider = ${cassandra.default.session-provider}

}

lagom.persistence.read-side.cassandra {

contact-points = ${cassandra.default.contact-points}

session-provider = ${cassandra.default.session-provider}

}

十、部署自己的scala application时，发现一直会抛一个异常说是一个名为“application”的akka-remote-actor无法定位，发现通过play.akka.actor-system配置的name被篡改成application，

发现因为ConductR是收费的，而我们使用了DnsServiceLocator,所以Loader中需要把extends ConductR改成extends DnsServiceLocator，这样actor-system就可以正常配置了。

ref：https://index.scala-lang.org/lightbend/service-locator-dns/lagom-service-locator-dns/1.0.2?target=_2.11

十一、kafka配置问题。

在配置外部静态kafka时，会遇到下面这个问题。

[error] com.lightbend.lagom.internal.broker.kafka.KafkaSubscriberActor [sourceThread=myservice-akka.actor.default-dispatcher-19, akkaTimestamp=07:51:51.537UTC, akkaSource=akka.tcp://myservice@myservice-0.myservice.default.svc.cluster.local:2551/user/KafkaBackoffConsumer1-myEvents/KafkaConsumerActor1-myEvents, sourceActorSystem=myservice] - Unable to locate Kafka service named [myservice]

这个问题解决的方法是，我们不仅要在build.sbt中配置

lagomKafkaEnabled in ThisBuild := false
lagomKafkaAddress in ThisBuild := "10.0.0.xx:9092"

还要在serviceImpl的applicaton.conf中配置,首先要把service-name置空，brokers=ip:port,其他和Lagom官网上Kafka client配置一样。

lagom.broker.kafka {
# The name of the Kafka service to look up out of the service locator.
# If this is an empty string, then a service locator lookup will not be done,
# and the brokers configuration will be used instead.
service-name = ""

# The URLs of the Kafka brokers. Separate each URL with a comma.
# This will be ignored if the service-name configuration is non empty.
brokers = "10.0.0.58:9092"
}

如果kafka抛出WakeupException，Consumer actor terminated，详情见：https://github.com/lagom/lagom/issues/705，需要修改kafka server.properties中的

advertised.listeners=PLAINTEXT://your IP:9092

十二、k8s健康检查探针的问题

k8s部署之后，通过kube get pods发现我们刚deploy的服务状态是Running，但是容器状态Ready是false，通过kubectl describe pod servicename，发现

readiness probe failed: Get http://10.108.88.40:8080/healthz: dial tcp 10.108.88.40:8080: getsockopt: connection refused这里是因为我们URL错误。

Lagom需要我们在使用circuit-breaker来配置这个URL。

application.conf

lagom.circuit-breaker {

# Default configuration that is used if a configuration section
# with the circuit breaker identifier is not defined.
default {
# Possibility to disable a given circuit breaker.
enabled = on

# Number of failures before opening the circuit.  
max-failures = 

# Duration of time after which to consider a call a failure.  
call-timeout = 10s

# Duration of time in open state after which to attempt to close  
# the circuit, by first entering the half-open state.  
reset-timeout = 15s  

}
}

在scala版本的serviceApplication中，

lazy val lagomServer = LagomServer.forServices(
bindService[YourService].to(wire[YourImpl]),
metricsServiceBinding
)

加入metricsServiceBinding，这里就可以解决这个问题。

十三、traefik会把k8s对外的ip设置成80.

harbor：https://www.jianshu.com/p/2ebadd9a323d

docker-compose.yml主要修改registry容器参数，在network下增加如下图中框内的内容：

4、harbor.cfg只需要修改hostname为你自己的机器IP或者域名，harbor默认的db连接密码为root123，可以自己修改，也可以保持默认，harbor初始管理员密码为Harbor12345，可以根据自己需要进行修改，email选项是用来忘记密码重置用的，根据实际情况修改，如果使用163或者qq邮箱等，需要使用授权码进行登录，此时就不能使用密码登录了，会无效的（qq使用授权码登录第三方邮箱客户端自行百度

5.访问harbor， 登陆之后的页面：