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Commit7da7e86

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Merge pull request#23 from partcyborg/ns-and-ctx
Support providing namespace and context
2 parents10f9b71 +542d2a3 commit7da7e86

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‎README.md‎

Lines changed: 8 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -125,16 +125,18 @@ Options:
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dest_node must start from the following letters:
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ASCII letters 'a' through 'z' or 'A' through 'Z',
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the digits '0' through '9', or hyphen ('-').
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NOTE: Setting dest_node as 'jumphost' allows to
129-
ssh into SSH jump Pod as 'root' user
128+
NOTE: Setting dest_node as 'jumphost' allows to
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ssh into SSH jump Pod as 'root' user
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-u, --user <sshuser> SSH User name
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-i, --identity <identity_file> Identity key file, or PEM(Privacy Enhanced Mail)
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-p, --pubkey <pub_key_file> Public key file
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-P, --port <port> SSH port for target node SSH server
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Defaults to 22
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-a, --args <args> Args to exec in ssh session
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-n, --namespace <ns> Namespace for jump pod
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--context <context> Kubernetes context
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--pod-template <file> Path to custom sshjump pod definition
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--skip-agent Skip automatically starting SSH agent and adding
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--skip-agent Skip automatically starting SSH agent and adding
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SSH Identity key into the agent before SSH login
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(=> You need to manage SSH agent by yourself)
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--cleanup-agent Clearning up SSH agent at the end
@@ -174,10 +176,11 @@ In addtion, add `--skip-agent` option if you want to skip automatic starting `ss
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###Customize SSH jump pod
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You can customize the sshjump pod created by`kubectl ssh-jump` by setting the`$SSH_JUMP_POD_TEMPLATE` environment variable to the path to a pod template on disk.
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You can customize the sshjump pod created by`kubectl ssh-jump` by setting the`--pod-template` flag to the path to a pod template on disk.
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However, customized sshjump pods must be named`sshjump` and run in the current namespace or`kubectl ssh-jump` won't be able to find them.
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You can also specify the namespace and context used by`kubectl ssh-jump` by setting the`--namespace` and`--context` flags respectively.
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###Examples
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Show all node list. Simply executing`kubectl ssh-jump` gives you the list of destination nodes as well as command usage

‎kubectl-ssh-jump‎

Lines changed: 14 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -33,6 +33,8 @@ Options:
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-P, --port <port> SSH port for target node SSH server
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Defaults to 22
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-a, --args <args> Args to exec in ssh session
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-n, --namespace <ns> Namespace for jump pod
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--context <context> Kubernetes context
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--pod-template <file> Path to custom sshjump pod definition
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--skip-agent Skip automatically starting SSH agent and adding
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SSH Identity key into the agent before SSH login
@@ -78,7 +80,7 @@ EOF
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get_node_list(){
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echo"List of destination node..."
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kubectl get no -o custom-columns=Hostname:.metadata.name,Internal-IP:'{.status.addresses[?(@.type=="InternalIP")].address}'
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kubectl"${k_args[@]}"get no -o custom-columns=Hostname:.metadata.name,Internal-IP:'{.status.addresses[?(@.type=="InternalIP")].address}'
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echo""
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}
8486

@@ -88,7 +90,7 @@ get_openssh_verion_number() {
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cleanup_sshjump_pod(){
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echo"Clearning up SSH Jump host (Pod)..."
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kubectl delete pod sshjump
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kubectl"${k_args[@]}"delete pod sshjump
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}
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check_and_start_agent(){
@@ -150,7 +152,7 @@ EOF
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)
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fi
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echo"Creating SSH jump host (Pod)..."
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echo"${pod_template}"| kubectl apply -f -
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echo"${pod_template}"| kubectl"${k_args[@]}"apply -f -
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}
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run_ssh_node(){
@@ -162,15 +164,15 @@ run_ssh_node(){
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local sshargs="$6"
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# Install an SSH Server if not yet installed
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r=$(kubectl get pod sshjump2>/dev/null| tail -1| awk'{print $1}')#
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r=$(kubectl"${k_args[@]}"get pod sshjump2>/dev/null| tail -1| awk'{print $1}')#
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if ["${r}"!="sshjump" ];then
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create_jump_pod
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# Wait until sshjump gets ready
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c=1
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while [[${c}-le${MAX_POD_CREATION_TIME} ]];
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do
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pod_status=$(kubectl get pod sshjump2>/dev/null| tail -1| awk'{print $3}')
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pod_status=$(kubectl"${k_args[@]}"get pod sshjump2>/dev/null| tail -1| awk'{print $3}')
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if ["${pod_status}"="Running" ];then
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break
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fi
@@ -192,15 +194,15 @@ run_ssh_node(){
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fi
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# Setup portforward
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kubectl port-forward sshjump 2222:222>/dev/null&
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kubectl"${k_args[@]}"port-forward sshjump 2222:222>/dev/null&
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pid_port_forward=$!
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# Wait a bit for the port forwarding to get ready for connection handling for 2222
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sleep 2
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# Inject public SSH key to sshjump
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cat${pubkey_sshjump}| \
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kubectlexec -i sshjump -- /bin/bash -c"cat > /root/.ssh/authorized_keys"
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kubectl"${k_args[@]}"exec -i sshjump -- /bin/bash -c"cat > /root/.ssh/authorized_keys"
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# Add default ssh option
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sshargs="${sshargs} -o StrictHostKeyChecking=no"
@@ -227,6 +229,7 @@ plugin_main() {
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cleanup_jump=no
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cleanup_agent=no
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sshargs=""
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k_args=()
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while [$#-gt 0 ];do
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nSkip=1
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case$1in
@@ -266,6 +269,10 @@ plugin_main() {
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sshargs="${sshargs}$2"
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nSkip=2
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;;
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"-n" |"--namespace" |"--context")
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k_args+=("$1""$2")
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nSkip=2
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;;
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"--pod-template")
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jump_pod_template="$2"
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nSkip=2

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