click 0.6.3

A command-line REPL for Kubernetes that integrates into existing cli workflows
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267

// Copyright 2021 Databricks, Inc.

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at

// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// service is a bit more complex, so handle it here

use crate::{
    command::keyval_string,
    env::Env,
    error::ClickError,
    output::ClickWriter,
    values::{val_str, val_u64},
};

use clap::ArgMatches;
use k8s_openapi::api::core::v1 as api;
use serde_json::Value;
use std::{borrow::Cow, io::Write, str::FromStr};

pub fn service_describe(
    name: &str,
    namespace: &str,
    matches: &ArgMatches,
    env: &Env,
    writer: &mut ClickWriter,
    table: &mut comfy_table::Table,
) -> Result<(), ClickError> {
    let (request, _) =
        api::Endpoints::read_namespaced_endpoints(name, namespace, Default::default()).unwrap();
    let epval = match env
        .run_on_context(|c| c.read(env.get_impersonate_user(), request))
        .unwrap()
    {
        api::ReadNamespacedEndpointsResponse::Ok(resp) => serde_json::value::to_value(resp).ok(),
        _ => {
            clickwriteln!(writer, "Error fetching endpoints");
            None
        }
    };

    let (request, _) =
        api::Service::read_namespaced_service(name, namespace, Default::default()).unwrap();
    match env
        .run_on_context(|c| c.read(env.get_impersonate_user(), request))
        .unwrap()
    {
        api::ReadNamespacedServiceResponse::Ok(service) => {
            if !super::maybe_full_describe_output(matches, &service, writer) {
                super::describe_metadata(&service, table)?;
                let val = serde_json::value::to_value(&service).unwrap();
                describe_format_service(&service, val, epval, table);
            }
        }
        _ => {
            clickwriteln!(writer, "Invalid response trying to read service info");
        }
    }
    Ok(())
}

/// Utility function for describe to print service info
fn describe_format_service(
    service: &api::Service,
    v: Value,
    endpoint_val: Option<Value>,
    table: &mut comfy_table::Table,
) {
    let port_str = get_ports_str(v.pointer("/spec/ports"), endpoint_val);
    table.add_row(vec![
        "Selector:",
        service
            .spec
            .as_ref()
            .and_then(|spec| {
                spec.selector
                    .as_ref()
                    .map(|selector| keyval_string(selector.iter(), None))
            })
            .unwrap_or_else(|| "<none>".to_string())
            .as_str(),
    ]);
    table.add_row(vec![
        "Type:",
        service
            .spec
            .as_ref()
            .and_then(|spec| spec.type_.as_deref())
            .unwrap_or("<none>"),
    ]);
    table.add_row(vec![
        "IP:",
        service
            .spec
            .as_ref()
            .and_then(|spec| spec.cluster_ip.as_deref())
            .unwrap_or("<none>"),
    ]);

    let ingress = match service.status.as_ref().and_then(|status| {
        status
            .load_balancer
            .as_ref()
            .and_then(|load_bal| load_bal.ingress.as_ref())
    }) {
        Some(ingress) => {
            let mut buf = String::new();
            if ingress.is_empty() {
                buf.push_str("<none>");
            } else {
                for ingress in ingress.iter() {
                    let istr = ingress
                        .hostname
                        .as_deref()
                        .unwrap_or_else(|| ingress.ip.as_deref().unwrap_or("<unknown>"));
                    buf.push_str(istr);
                }
            }
            buf
        }
        None => "<none>".to_string(),
    };
    table.add_row(vec!["LoadBalIngress:", ingress.as_str()]);
    table.add_row(vec![
        "Session Affinity:",
        service
            .spec
            .as_ref()
            .and_then(|spec| spec.session_affinity.as_deref())
            .unwrap_or("<none>"),
    ]);
    table.add_row(vec![
        "External Traffic Policy:",
        service
            .spec
            .as_ref()
            .and_then(|spec| spec.external_traffic_policy.as_deref())
            .unwrap_or("<none>"),
    ]);
    table.add_row(vec![
        "Load Balancer Source Ranges:",
        service
            .spec
            .as_ref()
            .and_then(|spec| {
                spec.load_balancer_source_ranges.as_ref().and_then(|lbsr| {
                    if lbsr.is_empty() {
                        None
                    } else {
                        Some(lbsr.join(", "))
                    }
                })
            })
            .unwrap_or_else(|| "<none>".to_string())
            .as_str(),
    ]);
    table.add_row(vec!["Ports:", port_str.as_ref()]);
}

/// Get ports info out of ports array
fn get_ports_str(v: Option<&Value>, endpoint_val: Option<Value>) -> Cow<str> {
    if v.is_none() {
        return "<none>".into();
    }
    let mut buf = String::new();
    match v.unwrap().as_array() {
        // safe unwrap, checked above
        Some(port_array) => {
            for port in port_array.iter() {
                let proto = val_str("/protocol", port, "<Unknown>");
                let name = val_str("/name", port, "<No Name>");
                let port_num = val_u64("/port", port, 0);
                let endpoints = match endpoint_val {
                    Some(ref ep) => {
                        // to get all the endpoints, we need to check all subsets this port is in
                        // TODO: This is complex, simplify and/or abstract
                        let mut epbuf = String::from_str("Endpoints:  ").unwrap();
                        let mut found_one = false;
                        ep.pointer("/subsets").map(|s| {
                            s.as_array().map(|subsets| {
                                for subset in subsets.iter() {
                                    // see if this subset has this port by checking if any port in
                                    // the ports array has the same port number
                                    let contains = subset
                                        .pointer("/ports")
                                        .map(|p| {
                                            p.as_array()
                                                .map(|ports_array| {
                                                    let mut c = false;
                                                    for port in ports_array.iter() {
                                                        if port_num == val_u64("/port", port, 0) {
                                                            c = true;
                                                        }
                                                    }
                                                    c
                                                })
                                                .unwrap_or(false)
                                        })
                                        .unwrap_or(false);
                                    if contains {
                                        // we do have this port, need to add all addresses as
                                        // endpoints
                                        found_one = true;
                                        let port_num = val_u64("/targetPort", port, 0);
                                        subset.pointer("/addresses").map(|a| {
                                            a.as_array().map(|addr_array| {
                                                let mut first = true;
                                                for addr in addr_array.iter() {
                                                    if first {
                                                        first = false;
                                                    } else {
                                                        epbuf.push_str(", ");
                                                    }
                                                    epbuf.push_str(
                                                        format!(
                                                            "{}:{}",
                                                            val_str("/ip", addr, "<No IP>"),
                                                            port_num
                                                        )
                                                        .as_str(),
                                                    );
                                                }
                                            })
                                        });
                                    }
                                }
                            })
                        });
                        if !found_one {
                            epbuf.push_str("<none>");
                        }
                        epbuf.push('\n');
                        epbuf
                    }
                    None => "<No Endpoints>\n".to_owned(),
                };
                buf.push_str(format!("Port:  {name} {port_num}/{proto}\n").as_str());
                buf.push_str(
                    format!(
                        "NodePort:  {} {}/{}\n",
                        val_str("/name", port, "<No Name>"),
                        val_u64("/nodePort", port, 0),
                        proto
                    )
                    .as_str(),
                );
                buf.push_str(endpoints.as_str());
            }
        }
        None => buf.push_str("<none>"),
    }
    if let Some(last) = buf.chars().last() {
        if last == '\n' {
            buf.pop();
        }
    }
    buf.into()
}