DataStoreError：无效的ETCD_CA_CERT_FILE . 证书颁发机构证书是必需的，并且必须是可读的文件路径

我家里有两台CoreOS稳定（1185.5.0）服务器 . 我尝试在这两个上安装kubernetes控制器和worker .

我使用coreos-kubernetes脚本从https://github.com/coreos/coreos-kubernetes/tree/master/multi-node/generic进行安装，并从https://github.com/kfirufk/coreos-kubernetes-multi-node-generic-install-script进行修补 . 我使用 rkt 来运行相关的容器 .

我使用以下环境变量选项覆盖文件：

ETCD_AUTHORITY=coreos-3.tux-in.com:2379
ETCD_ENDPOINTS="https://coreos-2.tux-in.com:2379,https://coreos-3.tux-in.com:2379"
CONTROLLER_ENDPOINT=https://coreos-2.tux-in.com
K8S_VER=v1.5.0-beta.3_coreos.0
HYPERKUBE_IMAGE_REPO=quay.io/coreos/hyperkube
DNS_SERVICE_IP=10.3.0.10
USE_CALICO=true
CONTAINER_RUNTIME=rkt
OVERWRITE_ALL_FILES=true
ADVERTISE_IP=10.79.218.3
ETCD_CERT_FILE="/etc/ssl/etcd/etcd2.pem"
ETCD_KEY_FILE="/etc/ssl/etcd/etcd2-key.pem"
ETCD_TRUSTED_CA_FILE="/etc/ssl/etcd/ca.pem"
ETCD_SCHEME="https"
IS_MASK_UPDATE_ENGINE=false

解析为 10.79.218.2 的 coreos-2.tux-in.com 是控制器节点 .

解析为 10.79.218.3 的 coreos-3.tux-in.com 是工作节点 .

似乎控制器脚本安装得很好 .

当我尝试在第二台服务器上安装kubernetes worker时，我注意到以下错误消息一直出现在kubelet日志中：

2016-12-12 12:24:08,171 6960 [kube-system/kubernetes-dashboard-v1.4.1-kjj0c] ERROR Unhandled Exception killed plugin
Dec 12 12:24:08 coreos-3.tux-in.com kubelet-wrapper[1786]: Traceback (most recent call last):
Dec 12 12:24:08 coreos-3.tux-in.com kubelet-wrapper[1786]:   File "<string>", line 773, in main
Dec 12 12:24:08 coreos-3.tux-in.com kubelet-wrapper[1786]:   File "<string>", line 64, in __init__
Dec 12 12:24:08 coreos-3.tux-in.com kubelet-wrapper[1786]:   File "site-packages/pycalico/datastore.py", line 229, in __init__
Dec 12 12:24:08 coreos-3.tux-in.com kubelet-wrapper[1786]: DataStoreError: Invalid ETCD_CA_CERT_FILE. Certificate Authority cert is required and must be a readable file path. Value provided:
Dec 12 12:24:08 coreos-3.tux-in.com kubelet-wrapper[1786]: 2016-12-12 12:24:08,171 6960 [kube-system/kubernetes-dashboard-v1.4.1-kjj0c] ERROR CNI Error:
Dec 12 12:24:08 coreos-3.tux-in.com kubelet-wrapper[1786]: {
Dec 12 12:24:08 coreos-3.tux-in.com kubelet-wrapper[1786]:   "msg": "Unhandled Exception killed plugin",
Dec 12 12:24:08 coreos-3.tux-in.com kubelet-wrapper[1786]:   "cniVersion": "0.1.0",
Dec 12 12:24:08 coreos-3.tux-in.com kubelet-wrapper[1786]:   "code": 100,
Dec 12 12:24:08 coreos-3.tux-in.com kubelet-wrapper[1786]:   "details": null
Dec 12 12:24:08 coreos-3.tux-in.com kubelet-wrapper[1786]: }
Dec 12 12:24:08 coreos-3.tux-in.com kubelet-wrapper[1786]: Traceback (most recent call last):
Dec 12 12:24:08 coreos-3.tux-in.com kubelet-wrapper[1786]:   File "<string>", line 773, in main
Dec 12 12:24:08 coreos-3.tux-in.com kubelet-wrapper[1786]:   File "<string>", line 64, in __init__
Dec 12 12:24:08 coreos-3.tux-in.com kubelet-wrapper[1786]:   File "site-packages/pycalico/datastore.py", line 229, in __init__
Dec 12 12:24:08 coreos-3.tux-in.com kubelet-wrapper[1786]: DataStoreError: Invalid ETCD_CA_CERT_FILE. Certificate Authority cert is required and must be a readable file path. Value provided:

Invalid ETCD_CA_CERT_FILE 错误消息显示提供的值为空，这表明由于某种原因未设置ETCD_CA_CERT_FILE环境变量 . 我尝试编辑 /etc/systemd/system/kubelet.service 并在[服务]下添加 Environment=ETCD_CA_CERT_FILE=/etc/ssl/etcd/ca.pem 但结果是一样的 . 有任何想法吗 ？