我有 3 个完全不同的豆荚:
kubectl get pods -o go-template --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end}}'
kubernetes-bootcamp-5c69669756-5rh9t
queenly-seahorse-mysql-6dc964999c-h4w54
wordpress-mysql-bcc89f687-hs677
但他们似乎共享相同的环境变量。例如
kubectl exec "kubernetes-bootcamp-5c69669756-5rh9t" env | grep MYSQL
QUEENLY_SEAHORSE_MYSQL_PORT_3306_TCP=tcp://10.98.170.14:3306
QUEENLY_SEAHORSE_MYSQL_SERVICE_PORT_MYSQL=3306
QUEENLY_SEAHORSE_MYSQL_PORT_3306_TCP_ADDR=10.98.170.14
QUEENLY_SEAHORSE_MYSQL_SERVICE_HOST=10.98.170.14
QUEENLY_SEAHORSE_MYSQL_SERVICE_PORT=3306
QUEENLY_SEAHORSE_MYSQL_PORT=tcp://10.98.170.14:3306
QUEENLY_SEAHORSE_MYSQL_PORT_3306_TCP_PORT=3306
QUEENLY_SEAHORSE_MYSQL_PORT_3306_TCP_PROTO=tcp
然后在一个完全不同的、不相关的 pod 上(但在同一个节点上):
kubectl exec "queenly-seahorse-mysql-6dc964999c-h4w54" env | grep MYSQL
MYSQL_ROOT_PASSWORD=<redact>
MYSQL_PASSWORD=<redact>
MYSQL_USER=
MYSQL_DATABASE=
QUEENLY_SEAHORSE_MYSQL_PORT=tcp://10.98.170.14:3306
QUEENLY_SEAHORSE_MYSQL_PORT_3306_TCP=tcp://10.98.170.14:3306
QUEENLY_SEAHORSE_MYSQL_PORT_3306_TCP_PORT=3306
QUEENLY_SEAHORSE_MYSQL_PORT_3306_TCP_ADDR=10.98.170.14
QUEENLY_SEAHORSE_MYSQL_SERVICE_PORT=3306
QUEENLY_SEAHORSE_MYSQL_SERVICE_HOST=10.98.170.14
QUEENLY_SEAHORSE_MYSQL_SERVICE_PORT_MYSQL=3306
QUEENLY_SEAHORSE_MYSQL_PORT_3306_TCP_PROTO=tcp
MYSQL_MAJOR=5.7
MYSQL_VERSION=5.7.14-1debian8
任何解释为什么?
FWIW,我显然exec
正在进入 2 个不同的吊舱。例如
kubectl exec "queenly-seahorse-mysql-6dc964999c-h4w54" env | grep HOSTNAME
HOSTNAME=queenly-seahorse-mysql-6dc964999c-h4w54
kubectl exec "kubernetes-bootcamp-5c69669756-5rh9t" env | grep HOSTNAME
HOSTNAME=kubernetes-bootcamp-5c69669756-5rh9t