Lab 4.1 - sh: find: command not found

I ran into this as well. I am not entirely sure if it is because the etcd container is updated to a very minimal image, but I found a workaround:

1. On the control panel / master server, I looked for the etcd container:

sudo docker ps -a | grep etcd
efb1d0cf67a5        0369cf4303ff           "etcd --advertise-cl…"   About an hour ago   Up About an hour                                   k8s_etcd_etcd-cp01_kube-system_c14cf7d1dfa698068ffc2f808ebe757d_5
eb00f4b04d24        k8s.gcr.io/pause:3.2   "/pause"                 About an hour ago   Up About an hour                                   k8s_POD_etcd-cp01_kube-system_c14cf7d1dfa698068ffc2f808ebe757d_5
f0cc0d56dfbf        0369cf4303ff           "etcd --advertise-cl…"   32 hours ago        Exited (0) 32 hours ago                            k8s_etcd_etcd-cp01_kube-system_c14cf7d1dfa698068ffc2f808ebe757d_4
4ed688ab3e53        k8s.gcr.io/pause:3.2   "/pause"                 32 hours ago        Exited (0) 32 hours ago                            k8s_POD_etcd-cp01_kube-system_c14cf7d1dfa698068ffc2f808ebe757d_4

2. Once I found the container, I ran docker inspec on the container and look at the parameters passed to the containers that reference the etc directory, like so:

rilindo@cp01:~$ sudo docker inspect efb1d0cf67a5 | grep etc
        "Path": "etcd",
            "--cert-file=/etc/kubernetes/pki/etcd/server.crt",
            "--data-dir=/var/lib/etcd",
            "--key-file=/etc/kubernetes/pki/etcd/server.key",
            "--peer-cert-file=/etc/kubernetes/pki/etcd/peer.crt",
            "--peer-key-file=/etc/kubernetes/pki/etcd/peer.key",
            "--peer-trusted-ca-file=/etc/kubernetes/pki/etcd/ca.crt",
            "--trusted-ca-file=/etc/kubernetes/pki/etcd/ca.crt"
        "HostsPath": "/var/lib/kubelet/pods/c14cf7d1dfa698068ffc2f808ebe757d/etc-hosts",
        "Name": "/k8s_etcd_etcd-cp01_kube-system_c14cf7d1dfa698068ffc2f808ebe757d_5",
                "/var/lib/etcd:/var/lib/etcd",
                "/etc/kubernetes/pki/etcd:/etc/kubernetes/pki/etcd",
                "/var/lib/kubelet/pods/c14cf7d1dfa698068ffc2f808ebe757d/etc-hosts:/etc/hosts",
                "/var/lib/kubelet/pods/c14cf7d1dfa698068ffc2f808ebe757d/containers/etcd/7aecfad3:/dev/termination-log"
                "Source": "/var/lib/etcd",
                "Destination": "/var/lib/etcd",
                "Source": "/etc/kubernetes/pki/etcd",
                "Destination": "/etc/kubernetes/pki/etcd",
                "Source": "/var/lib/kubelet/pods/c14cf7d1dfa698068ffc2f808ebe757d/etc-hosts",
                "Destination": "/etc/hosts",
                "Source": "/var/lib/kubelet/pods/c14cf7d1dfa698068ffc2f808ebe757d/containers/etcd/7aecfad3",
                "SSL_CERT_FILE=/etc/ssl/certs/ca-certificates.crt"
                "etcd",
                "--cert-file=/etc/kubernetes/pki/etcd/server.crt",
                "--data-dir=/var/lib/etcd",
                "--key-file=/etc/kubernetes/pki/etcd/server.key",
                "--peer-cert-file=/etc/kubernetes/pki/etcd/peer.crt",
                "--peer-key-file=/etc/kubernetes/pki/etcd/peer.key",
                "--peer-trusted-ca-file=/etc/kubernetes/pki/etcd/ca.crt",
                "--trusted-ca-file=/etc/kubernetes/pki/etcd/ca.crt"
                "io.kubernetes.container.logpath": "/var/log/pods/kube-system_etcd-cp01_c14cf7d1dfa698068ffc2f808ebe757d/etcd/5.log",
                "io.kubernetes.container.name": "etcd",
                "io.kubernetes.pod.name": "etcd-cp01",

3. Now I got the paths, I can simply log in to the etcd pod and using the paths I found in my grep output, backup the etcd database.

@chrispokorni That is even easier. I would go with that approach, then.

Then how can I delete the file inside the container? When I tried to restore the etcd backup, I got the following error "Error: data-dir "default.etcd" exists"; I found default.etcd and snapshot.db under /tmp, I would like to remove those 2 files and retry toe etcd restore, how can I remove those 2 files inside the etcd container?

Thanks